# BaseDataTypeSerializer.java

    /*
    ** Module   : BaseDataTypeSerializer.java
    ** Abstract : A serializer and parser for BaseDataType instances.
    **
    ** Copyright (c) 2022, Golden Code Development Corporation.
    **
    ** -#- -I- --Date-- ---------------------------------------Description----------------------------------------
    ** 001 CA  20220323 Created initial version.
    **     TJD 20220504 Java 11 compatibility minor changes
    */
    /*
    ** 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.
    **
    **     You may not represent yourself for publicity purposes as associated with
    **     Golden Code Development Corporation, FWD, or any author or contributor to
    **     the covered work, without written authorization.
    **
    **   3. No Misrepresentation of Source or Origin.
    **
    **     You may not represent the covered work as solely your work.  All modified
    **     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.rest.serializers;

    import java.math.*;

    import com.fasterxml.jackson.databind.*;
    import com.fasterxml.jackson.databind.node.*;
    import com.goldencode.p2j.rest.*;
    import com.goldencode.p2j.util.*;

    /**
     * A parser and serializer for {@link BaseDataType} instances.
     */
    public class BaseDataTypeSerializer
    extends JavaTypeSerializer<BaseDataType>
    {
       /**
        * Create a new serializer for {@link BaseDataType} instances.
        */
       public BaseDataTypeSerializer()
       {
          super(BaseDataType.class);
       }

       /**
        * Create an initial (default) instance for this serializer.
        * <p>
        * Can be null for non-mutable instances.
        *
        * @param    definitionType
        *           The type as it appears at the parameter's definition.
        *
        * @return   <code>null</code> for immutable types, a Java native value for native types or a new instance,
        *           for mutable types.
        *
        * @throws   InstantiationException
        * @throws   IllegalAccessException
        */
       @Override
       public BaseDataType initialize(Class<? extends BaseDataType> definitionType)
       throws ReflectiveOperationException
       {
          return newInstance(definitionType, () -> new unknown());
       }

       /**
        * Parse the string JSON representation and assign it to the given argument.  If null or not mutable, a
        * new instance will be created.
        *
        * @param    arg
        *           The argument (obtained via {@link #initialize}.
        * @param    sval
        *           The string JSON representation of this argument.
        *
        * @return   The argument instance.
        *
        * @throws   RequestArgumentError
        *           If the argument can't be parsed.
        */
       @Override
       public BaseDataType fromJson(BaseDataType arg, String sval)
       throws RequestArgumentError
       {
          if (arg instanceof unknown)
          {
             return arg;
          }

          String typeName = arg.getTypeName();
          JavaTypeSerializer serializer = getBaseSerializer(typeName);

          if (serializer == null)
          {
             throw new RuntimeException("No serializer registered for " + arg.getClass().getName());
          }

          Object val;
          try
          {
             val = serializer.initialize(serializer.getType());
          }
          catch (ReflectiveOperationException e)
          {
             throw new RequestArgumentError("Could not initialize value in serializer " + serializer.getType());
          }

          val = serializer.fromJson(val, sval);

          BaseDataType.Type type = BaseDataType.Type.of(typeName);
          switch (type)
          {
             case CHARACTER:
             case LONGCHAR:
             case CLOB:
                ((Text) arg).assign((String) val);
                break;

             case DATE:
             case DATETIME:
             case DATETIMETZ:
             case DATETIME_TZ:
                ((date) arg).fromIso((String) val);
                break;

             case LOGICAL:
                ((logical) arg).assign((Boolean) val);
                break;

             case DECIMAL:
                ((decimal) arg).assign((BigDecimal) val);
                break;
             case INTEGER:
                ((integer) arg).assign((Integer) val);
                break;
             case INT64:
                ((int64) arg).assign((Long) val);
                break;

             case BLOB:
             case RAW:
                ((BinaryData) arg).assign((byte[]) val);
                break;

             case RECID:
                ((recid) arg).assign((Long) val);
                break;

             case ROWID:
                ((rowid) arg).assign((String) val);
                break;
          }

          return arg;
       }

       /**
        * Serialize the given instance to JSON.
        *
        * @param    val
        *           The instance to serialize.
        *
        * @return   The JSON representation of this instance.
        */
       @Override
       public JsonNode toJson(BaseDataType val)
       {
          if (val == null || val.isUnknown())
          {
             return JsonNodeFactory.instance.nullNode();
          }

          Object oval = null;

          BaseDataType.Type type = BaseDataType.Type.of(val.getTypeName());
          switch (type)
          {
             case UNKNOWN:
                oval = null;
                break;

             case CHARACTER:
             case LONGCHAR:
             case CLOB:
                oval = ((Text) val).toJavaType();
                break;

             case COMHANDLE:
             case COM_HANDLE:
             case OBJECT:
             case JOBJECT:
             case HANDLE:
             case TABLE_HANDLE:
             case DATASET_HANDLE:
             case MEMPTR:
                throw new RuntimeException("No serializer registered for " + val.getClass().getName());

             case DATE:
             case DATETIME:
             case DATETIMETZ:
             case DATETIME_TZ:
                oval = ((date) val).getIsoDate();
                break;

             case LOGICAL:
                oval = ((logical) val).toJavaType();
                break;

             case DECIMAL:
                oval = ((decimal) val).toJavaType();
                break;
             case INTEGER:
                oval = ((integer) val).toJavaIntegerType();
                break;
             case INT64:
                oval = ((int64) val).toJavaLongType();
                break;

             case BLOB:
             case RAW:
                oval = ((BinaryData) val).getByteArray();
                break;

             case RECID:
                oval = ((recid) val).toJavaLongType();
                break;

             case ROWID:
                oval = ((rowid) val).toStringMessage();
                break;
          }

          if (oval == null)
          {
             return JsonNodeFactory.instance.nullNode();
          }

          JavaTypeSerializer serializer = getSerializer(oval.getClass().getTypeName());

          return serializer.toJson(oval);
       }

       /**
        * Get the dedicated serializer for the specified {@link BaseDataType} implementation, which will be used
        * to convert the JSON text to a Java instance, to which the {@link BaseDataType} instance will be
        * assigned.
        *
        * @param    typeName
        *           The type name, as returned by {@link BaseDataType#getTypeName()}.
        *
        * @return   The associated serializer, or <code>null</code> if the type is not supported.
        */
       private JavaTypeSerializer getBaseSerializer(String typeName)
       {
          BaseDataType.Type type = BaseDataType.Type.of(typeName);
          JavaTypeSerializer serializer = null;
          switch (type)
          {
             case UNKNOWN:
                serializer = null;
                break;

             case CHARACTER:
             case LONGCHAR:
             case CLOB:
                serializer = STRING_SERIALIZER;
                break;

             case COMHANDLE:
             case COM_HANDLE:
             case OBJECT:
             case JOBJECT:
             case HANDLE:
             case TABLE_HANDLE:
             case DATASET_HANDLE:
             case MEMPTR:
                serializer = null;
                break;

             case DATE:
             case DATETIME:
             case DATETIMETZ:
             case DATETIME_TZ:
                serializer = STRING_SERIALIZER;
                break;

             case LOGICAL:
                serializer = BOOLEAN_SERIALIZER;
                break;

             case DECIMAL:
                serializer = BIGDECIMAL_SERIALIZER;
                break;
             case INTEGER:
                serializer = INTEGER_SERIALIZER;
                break;
             case INT64:
                serializer = LONG_SERIALIZER;
                break;

             case BLOB:
             case RAW:
                serializer = BYTEARRAY_SERIALIZER;
                break;

             case RECID:
                serializer = LONG_SERIALIZER;
                break;

             case ROWID:
                serializer = STRING_SERIALIZER;
                break;
          }

          return serializer;
       }
    }