PutField.java

/*
** Module   : PutField.java
** Abstract : handle data fields for I/O helpers
**
** Copyright (c) 2006-2020, Golden Code Development Corporation.
**
** -#- -I- --Date-- --JPRM-- ---------------------------------Description-----------------------------------
** 001 GES 20060925   @29900 Created initial version to handle data fields for I/O helpers.
** 002 SIY 20071001   @35320 Made class suitable for network transfers. Ref: #35314
** 003 SIY 20071003   @35351 Added default constructor. Header cleanup. Fixed NPE during
**                           serialization. Ref: #35347.
** 004 EVL 20160224          Javadoc fixes to make compatible with Oracle Java 8 for Solaris 10.
** 005 GES 20160530          Use lambdas instead of Resolvable instances.
** 006 GES 20200605          Added direct support for enums (implicitly treats them as being wrapped in the
**                           STRING() builtin function since the usage works with character format strings.
** 007 IAS 20200908          Rework (de)serialization.
*/

/*
** This program is free software: you can redistribute it and/or modify
** it under the terms of the GNU Affero General Public License as
** published by the Free Software Foundation, either version 3 of the
** License, or (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU Affero General Public License for more details.
**
** You may find a copy of the GNU Affero GPL version 3 at the following
** location: https://www.gnu.org/licenses/agpl-3.0.en.html
** 
** Additional terms under GNU Affero GPL version 3 section 7:
** 
**   Under Section 7 of the GNU Affero GPL version 3, the following additional
**   terms apply to the works covered under the License.  These additional terms
**   are non-permissive additional terms allowed under Section 7 of the GNU
**   Affero GPL version 3 and may not be removed by you.
** 
**   0. Attribution Requirement.
** 
**     You must preserve all legal notices or author attributions in the covered
**     work or Appropriate Legal Notices displayed by works containing the covered
**     work.  You may not remove from the covered work any author or developer
**     credit already included within the covered work.
** 
**   1. No License To Use Trademarks.
** 
**     This license does not grant any license or rights to use the trademarks
**     Golden Code, FWD, any Golden Code or FWD logo, or any other trademarks
**     of Golden Code Development Corporation. You are not authorized to use the
**     name Golden Code, FWD, or the names of any author or contributor, for
**     publicity purposes without written authorization.
** 
**   2. No Misrepresentation of Affiliation.
** 
**     You may not represent yourself as Golden Code Development Corporation or FWD.
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**     Golden Code Development Corporation, FWD, or any author or contributor to
**     the covered work, without written authorization.
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**   3. No Misrepresentation of Source or Origin.
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**     versions of the covered work must be marked in a reasonable way to make it
**     clear that the modified work is not originating from Golden Code Development
**     Corporation or FWD.  All modified versions must contain the notices of
**     attribution required in this license.
*/

package com.goldencode.p2j.util;

import static com.goldencode.util.NativeTypeSerializer.*; 
import java.io.*;
import java.util.function.*;
import com.goldencode.p2j.oo.lang.*;

/**
 * Handles output of data fields for I/O helpers. 
 */
public class PutField
extends FieldEntry
{
   /** The data to output to the stream. */
   private Supplier<BaseDataType> data = null;
                            
   /** 
    * The format string to use on output. TODO: the format string needs to be validated, before
    * starting the output. Note that a "?" string represents the unknown value. 
    */
   private String fmt = null;
                                                  
   /** <code>true</code> to force either AT or TO positional modes. */
   private boolean positional = false;
   
   /** <code>true</code> if using AT mode, <code>false</code> for TO mode. */
   private boolean atMode = false;
   
   /** The column to honor in AT or TO mode. */
   private int column = -1;

   /** Resolved variable value. */
   private BaseDataType savedVar = null;

   /**
    * Default constructor which is necessary to restores instance when it is
    * transferred via network.
    */
   public PutField()
   {
   }
   
   /**
    * Append the <code>int</code> value to the output buffer with the default
    * format string of '-&gt;,&gt;&gt;&gt;,&gt;&gt;9' at the current output column.
    * <p>
    * Note that this format string works as the display form, which pads on
    * the left to the full size of the format string.  This is different from
    * the normal operation of <code>toString</code>.    
    *
    * @param    val
    *           The data to be output.
    */
   public PutField(int val)
   {
      this(val, null);
   }
   
   /**
    * Append the <code>int</code> value to the output buffer with the given
    * format string at the current output column.
    * <p>
    * Note that this format string works as the display form, which pads on
    * the left to the full size of the format string.  This is different from
    * the normal operation of <code>toString</code>.
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           '-&gt;,&gt;&gt;&gt;,&gt;&gt;9' will be used.
    */
   public PutField(int val, String fmt)
   {
      this(new integer(val), fmt);
   }
   
   /**
    * Append the <code>int</code> value to the output buffer with the default
    * format string of '-&gt;,&gt;&gt;&gt;,&gt;&gt;9' at the current output column.
    * <p>
    * Note that this format string works as the display form, which pads on
    * the left to the full size of the format string.  This is different from
    * the normal operation of <code>toString</code>.
    *
    * @param    val
    *           The data to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(int val, boolean starts, int col)
   {
      this(val, null, starts, col);
   }
   
   /**
    * Append the <code>int</code> value to the output buffer with the given
    * format string at the current output column.
    * <p>
    * Note that this format string works as the display form, which pads on
    * the left to the full size of the format string.  This is different from
    * the normal operation of <code>toString</code>.
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           '-&gt;,&gt;&gt;&gt;,&gt;&gt;9' will be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(int val, String fmt, boolean starts, int col)
   {
      this(new integer(val), fmt, starts, col);
   }
   
   /**
    * Append the <code>int</code> value to the output buffer with the default
    * format string of '-&gt;,&gt;&gt;&gt;,&gt;&gt;9' at the current output column.
    * <p>
    * Note that this format string works as the display form, which pads on
    * the left to the full size of the format string.  This is different from
    * the normal operation of <code>toString</code>.
    *
    * @param    val
    *           The data to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(int val, boolean starts, NumberType col)
   {
      this(val, null, starts, col.intValue());
   }
   
   /**
    * Append the <code>int</code> value to the output buffer with the given
    * format string at the current output column.
    * <p>
    * Note that this format string works as the display form, which pads on
    * the left to the full size of the format string.  This is different from
    * the normal operation of <code>toString</code>.
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           '-&gt;,&gt;&gt;&gt;,&gt;&gt;9' will be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(int val, String fmt, boolean starts, NumberType col)
   {
      this(new integer(val), fmt, starts, col.intValue());
   }
   
   /**
    * Append the <code>double</code> value to the output buffer with the
    * default format string of '-&gt;&gt;,&gt;&gt;9.99' at the current output column. 
    * <p>
    * Note that this format string works as the display form, which pads on
    * the left to the full size of the format string.  This is different from
    * the normal operation of <code>toString</code>.    
    *
    * @param    val
    *           The data to be output.
    */
   public PutField(double val)
   {
      this(val, null);
   }
   
   /**
    * Append the <code>double</code> value to the output buffer with the
    * given format string at the current output column.
    * <p>
    * Note that this format string works as the display form, which pads on
    * the left to the full size of the format string.  This is different from
    * the normal operation of <code>toString</code>.
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           '-&gt;&gt;,&gt;&gt;9.99' will be used.
    */
   public PutField(double val, String fmt)
   {
      this(new decimal(val), fmt);
   }
   
   /**
    * Append the <code>double</code> value to the output buffer with the
    * default format string of '-&gt;&gt;,&gt;&gt;9.99' at the current output column.
    * <p>
    * Note that this format string works as the display form, which pads on
    * the left to the full size of the format string.  This is different from
    * the normal operation of <code>toString</code>.
    *
    * @param    val
    *           The data to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(double val, boolean starts, int col)
   {
      this(val, null, starts, col);
   }
   
   /**
    * Append the <code>double</code> value to the output buffer with the
    * given format string at the current output column.
    * <p>
    * Note that this format string works as the display form, which pads on
    * the left to the full size of the format string.  This is different from
    * the normal operation of <code>toString</code>.
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           '-&gt;&gt;,&gt;&gt;9.99' will be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(double val, String fmt, boolean starts, int col)
   {
      this(new decimal(val), fmt, starts, col);
   }
   
   /**
    * Append the <code>double</code> value to the output buffer with the
    * default format string of '-&gt;&gt;,&gt;&gt;9.99' at the current output column.
    * <p>
    * Note that this format string works as the display form, which pads on
    * the left to the full size of the format string.  This is different from
    * the normal operation of <code>toString</code>.
    *
    * @param    val
    *           The data to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(double val, boolean starts, NumberType col)
   {
      this(val, null, starts, col.intValue());
   }
   
   /**
    * Append the <code>double</code> value to the output buffer with the
    * given format string at the current output column.
    * <p>
    * Note that this format string works as the display form, which pads on
    * the left to the full size of the format string.  This is different from
    * the normal operation of <code>toString</code>.
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           '-&gt;&gt;,&gt;&gt;9.99' will be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(double     val,
                String     fmt,
                boolean    starts,
                NumberType col)
   {
      this(new decimal(val), fmt, starts, col.intValue());
   }
   
   /**
    * Append the <code>boolean</code> value to the output buffer with the
    * default format string of 'yes/no' at the current output column. 
    *
    * @param    val
    *           The data to be output.
    */
   public PutField(boolean val)
   {
      this(val, null);
   }
   
   /**
    * Append the <code>boolean</code> value to the output buffer with the
    * given format string at the current output column.
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           'yes/no' will be used.
    */
   public PutField(boolean val, String fmt)
   {
      this(new logical(val), fmt);
   }
   
   /**
    * Append the <code>boolean</code> value to the output buffer with the
    * default format string of 'yes/no' at the current output column.
    *
    * @param    val
    *           The data to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(boolean val, boolean starts, int col)
   {
      this(val, null, starts, col);
   }
   
   /**
    * Append the <code>boolean</code> value to the output buffer with the
    * given format string at the current output column.
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           'yes/no' will be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(boolean val, String fmt, boolean starts, int col)
   {
      this(new logical(val), fmt, starts, col);
   }
   
   /**
    * Append the <code>boolean</code> value to the output buffer with the
    * default format string of 'yes/no' at the current output column.
    *
    * @param    val
    *           The data to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(boolean val, boolean starts, NumberType col)
   {
      this(val, null, starts, col.intValue());
   }
   
   /**
    * Append the <code>boolean</code> value to the output buffer with the
    * given format string at the current output column.
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           'yes/no' will be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(boolean    val,
                   String     fmt,
                   boolean    starts,
                   NumberType col)
   {
      this(new logical(val), fmt, starts, col.intValue());
   }
   
   /**
    * Append the <code>String</code> value to the output buffer with a 
    * format string of 'x(N)' (where N is the length of the value) at the 
    * current output column. 
    *
    * @param    val
    *           The data to be output.
    */
   public PutField(String val)
   {
      this(val, null);
   }
   
   /**
    * Append the <code>String</code> value to the output buffer with the
    * given format string at the current output column.
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           'x(N)' will be used (where N is the length of the value).
    */
   public PutField(String val, String fmt)
   {
      this(new character(val), 
           Stream.generateStringFormat(fmt, val.length()));
   }
   
   /**
    * Append the <code>String</code> value to the output buffer with the
    * default format string of 'x(N)' will be used (where N is the length of
    * the value) at the current output column.
    *
    * @param    val
    *           The data to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(String val, boolean starts, int col)
   {
      this(val, null, starts, col);
   }
   
   /**
    * Append the <code>String</code> value to the output buffer with the
    * given format string at the current output column.
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           'x(N)' will be used (where N is the length of the value) will
    *           be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(String val, String fmt, boolean starts, int col)
   {
      this(new character(val),
           Stream.generateStringFormat(fmt, val.length()),
           starts,
           col);
   }
   
   /**
    * Append the <code>String</code> value to the output buffer with the
    * default format string of 'x(N)' will be used (where N is the length of
    * the value) at the current output column.
    *
    * @param    val
    *           The data to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(String val, boolean starts, NumberType col)
   {
      this(val, null, starts, col.intValue());
   }
   
   /**
    * Append the <code>String</code> value to the output buffer with the
    * given format string at the current output column.
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           'x(N)' will be used (where N is the length of the value) will
    *           be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(String     val,
                String     fmt,
                boolean    starts,
                NumberType col)
   {
      this(new character(val),
           Stream.generateStringFormat(fmt, val.length()),
           starts,
           col.intValue());
   }
   
   /**
    * Append the value to the output buffer with the default type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    */
   public PutField(BaseDataType val)
   {
      this(val, null);
   }
   
   /**
    * Append the value to the output buffer with the default type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    */
   public PutField(object<? extends LegacyEnum> val)
   {
      this(() -> character.valueOf(val), null);
   }
      
   /**
    * Append the value to the output buffer with the default type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    */
   public PutField(Resolvable val)
   {
      this(val, null);
   }
   
   /**
    * Append the value to the output buffer with the default type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The function which supplies the value to be output.
    */
   public PutField(Supplier<BaseDataType> val)
   {
      this(val, null);
   }
   
   /**
    * Append the value to the output buffer with the given type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           type-specific format will be used.
    */
   public PutField(final BaseDataType val, String fmt)
   {
      this.data = () -> val;
      this.fmt  = fmt;
   }
   
   /**
    * Append the value to the output buffer with the given type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           type-specific format will be used.
    */
   public PutField(final object<? extends LegacyEnum> val, String fmt)
   {
      this(() -> character.valueOf(val), fmt);
   }
   
   /**
    * Append the value to the output buffer with the given type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           type-specific format will be used.
    */
   public PutField(final Resolvable val, String fmt)
   {
      this.data = () -> val.resolve();
      this.fmt  = fmt;
   }
   
   /**
    * Append the value to the output buffer with the given type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The function which supplies the value to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           type-specific format will be used.
    */
   public PutField(Supplier<BaseDataType> val, String fmt)
   {
      this.data = val;
      this.fmt  = fmt;
   }
   
   /**
    * Append the value to the output buffer with the default type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(BaseDataType val, boolean starts, int col)
   {
      this(val, null, starts, col);
   }
   
   /**
    * Append the value to the output buffer with the default type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(Resolvable val, boolean starts, int col)
   {
      this(val, null, starts, col);
   }
   
   /**
    * Append the value to the output buffer with the default type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The function which supplies the value to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(Supplier<BaseDataType> val, boolean starts, int col)
   {
      this(val, null, starts, col);
   }
   
   /**
    * Append the value to the output buffer with the default type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(BaseDataType val, boolean starts, NumberType col)
   {
      this(val, null, starts, col.intValue());
   }
   
   /**
    * Append the value to the output buffer with the default type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(Resolvable val, boolean starts, NumberType col)
   {
      this(val, null, starts, col.intValue());
   }
   
   /**
    * Append the value to the output buffer with the default type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The function which supplies the value to be output.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(Supplier<BaseDataType> val, boolean starts, NumberType col)
   {
      this(val, null, starts, col.intValue());
   }
   
   /**
    * Append the value to the output buffer with the given type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           type-specific format will be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(BaseDataType val, String fmt, boolean starts, NumberType col)
   {
      this(val, fmt, starts, col.intValue());
   }      
      
   /**
    * Append the value to the output buffer with the given type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           type-specific format will be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(Resolvable val, String fmt, boolean starts, NumberType col)
   {
      this(val, fmt, starts, col.intValue());
   }      
      
   /**
    * Append the value to the output buffer with the given type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The function which supplies the value to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           type-specific format will be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(Supplier<BaseDataType> val, String fmt, boolean starts, NumberType col)
   {
      this(val, fmt, starts, col.intValue());
   }      
      
   /**
    * Append the value to the output buffer with the given type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           type-specific format will be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(final BaseDataType val, String fmt, boolean starts, int col)
   {
      this.data       = () -> val;
      this.fmt        = fmt;
      this.positional = true;
      this.atMode     = starts;
      this.column     = col;
   }
   
   /**
    * Append the value to the output buffer with the given type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           type-specific format will be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(final object<? extends LegacyEnum> val, String fmt, boolean starts, int col)
   {
      this(() -> character.valueOf(val), fmt, starts, col);
   }
   
   /**
    * Append the value to the output buffer with the given type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The data to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           type-specific format will be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(final Resolvable val, String fmt, boolean starts, int col)
   {
      this.data       = () -> val.resolve();
      this.fmt        = fmt;
      this.positional = true;
      this.atMode     = starts;
      this.column     = col;
   }
   
   /**
    * Append the value to the output buffer with the given type-specific 
    * format string at the current output column. 
    *
    * @param    val
    *           The function which supplies the value to be output.
    * @param    fmt
    *           The format string to use.  If <code>null</code>, the default
    *           type-specific format will be used.
    * @param    starts
    *           If <code>true</code>, the output will be placed starting at
    *           the given column (or on the next line at that column, if the
    *           given column is already in use on the current line). If
    *           <code>false</code>, the output will be placed so that it
    *           ends at the given column (or on the next line at that column,
    *           if the calculated start column is already in use on the
    *           current line).
    * @param    col
    *           The start or end column (which it is depends on the previous 
    *           parameter's value). This is used as a 1-based index into the
    *           current output line.
    */
   public PutField(Supplier<BaseDataType> val, String fmt, boolean starts, int col)
   {
      this.data       = val;
      this.fmt        = fmt;
      this.positional = true;
      this.atMode     = starts;
      this.column     = col;
   }
   
   /**
    * Renders the contained field definition to the given stream.
    *
    * @param    out
    *           The stream to which the field should be rendered.
    * @throws ErrorConditionException 
    */
   public void output(Stream out)
   throws ErrorConditionException
   {
      if (positional)
      {
         out.putField(data.get(), fmt, atMode, column);
      }
      else
      {
         out.putField(data.get(), fmt);
      }
   }

   /**
    * Notify instance that it is about to be transferred so all resolvable
    * data should be resolved and prepared for sending via network.
    */
   public void resolveData()   
   {
      savedVar = data.get();
   }
   
   /**
    * Replacement for the default object reading method. The latest
    * state is read from the input source.
    *
    * @param    in
    *           The input source from which fields will be restored.
    *
    * @throws   IOException
    *           In case of I/O errors.
    * @throws   ClassNotFoundException
    *           If payload can't be instantiated.
    */
   public void readExternal(ObjectInput in)
   throws IOException,
          ClassNotFoundException
   {
      boolean isNull;
      
      atMode     = in.readBoolean();
      positional = in.readBoolean();
      column     = in.readInt();
      fmt = readString(in);
      final BaseDataType data = readBaseDataType(in);
      this.data = () -> data;
   }

   /**
    * Replacement for the default object writing method. The latest
    * state is written to the output destination.
    *
    * @param    out
    *           The output destination to which fields will be saved.
    *
    * @throws   IOException
    *           In case of I/O errors.
    */
   public void writeExternal(ObjectOutput out)
   throws IOException
   {
      out.writeBoolean(atMode);
      out.writeBoolean(positional);
      out.writeInt(column);
      writeString(out, fmt);
      writeBaseDataType(out, savedVar);
   }
}