com.goldencode.p2j.persist

Class TableSignature

java.lang.Object

com.goldencode.p2j.persist.TableSignature

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable

public class TableSignature
extends java.lang.Object
implements java.io.Externalizable

Records the structure of a table in a manner that can be compared, serialized and deserialized. This class is used for RAW-TRANSFER. This is a basic implementation. The serialized form is not binary compatible with the 4GL.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private static java.util.Map<java.lang.Class<? extends BaseDataType>,java.lang.Byte>	c2b Class to byte mapping table.
private short[]	extents Each field's extent value in ascending order by the POSITION attribute in the schema.
private int	num Number of fields in the table.
private byte[]	types Each field's data type in ascending order by the POSITION attribute in the schema.

Constructor Summary

Constructors

Constructor and Description
TableSignature() Default constructor.
TableSignature(java.util.List<TableMapper.LegacyFieldInfo> fields) Constructor.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object that) Test the equivalence of the current instance to the given object.
void	readExternal(java.io.ObjectInput in) Replacement for the default object reading method.
void	writeExternal(java.io.ObjectOutput out) Replacement for the default object writing method.

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

c2b

private static final java.util.Map<java.lang.Class<? extends BaseDataType>,java.lang.Byte> c2b

Class to byte mapping table.

num

private int num

Number of fields in the table.

types

private byte[] types

Each field's data type in ascending order by the POSITION attribute in the schema.

extents

private short[] extents

Each field's extent value in ascending order by the POSITION attribute in the schema.

Constructor Detail

TableSignature

public TableSignature()

Default constructor.

TableSignature

public TableSignature(java.util.List<TableMapper.LegacyFieldInfo> fields)

Constructor.

Parameters:

fields - List of field descriptors.

Method Detail

equals

public boolean equals(java.lang.Object that)

Test the equivalence of the current instance to the given object.

Overrides:

equals in class java.lang.Object

Parameters:

that - The instance for comparison.

Returns:

true if given object is equal to the current instance

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Replacement for the default object reading method. The latest state is read from the input source.

Specified by:

readExternal in interface java.io.Externalizable

Parameters:

in - The input source from which fields will be restored.

Throws:

java.io.IOException - In case of I/O errors.

java.lang.ClassNotFoundException - If payload can't be instantiated.

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Replacement for the default object writing method. The latest state is written to the output destination.

Specified by:

writeExternal in interface java.io.Externalizable

Parameters:

out - The output destination to which fields will be saved.

Throws:

java.io.IOException - In case of I/O errors.