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org.apache.derby.catalog.types
Class ReferencedColumnsDescriptorImpl  

java.lang.Object
  org.apache.derby.catalog.types.ReferencedColumnsDescriptorImpl

All Implemented Interfaces:

java.io.Externalizable, org.apache.derby.iapi.services.io.Formatable, org.apache.derby.catalog.ReferencedColumns, java.io.Serializable, org.apache.derby.iapi.services.io.TypedFormat

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public class ReferencedColumnsDescriptorImpl

extends java.lang.Object

implements org.apache.derby.catalog.ReferencedColumns, org.apache.derby.iapi.services.io.Formatable

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Field Summary
private  int[]	referencedColumns           This class implements Formatable.

 

Constructor Summary

ReferencedColumnsDescriptorImpl()           Zero-argument constructor for Formatable interface

ReferencedColumnsDescriptorImpl(int[] referencedColumns)           Constructor for an ReferencedColumnsDescriptorImpl

 

Method Summary
int[]	getReferencedColumnPositions()           Returns an array of 1-based column positions in the table that the check constraint is on.
int	getTypeFormatId()           Get a universally unique identifier for the type of this object.
void	readExternal(java.io.ObjectInput in)           This method restores an object's state by reading in the instance data for the object from the passed in stream.
java.lang.String	toString()           Convert this Object to a human-readable String.
void	writeExternal(java.io.ObjectOutput out)           This method is responsible for writing the instance data of an object to the passed in stream.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

referencedColumns

private int[] referencedColumns

This class implements Formatable. That means that it can write itself to and from a formatted stream. If you add more fields to this class, make sure that you also write/read them with the writeExternal()/readExternal() methods. If, inbetween releases, you add more fields to this class, then you should bump the version number emitted by the getTypeFormatId() method.

Constructor Detail

ReferencedColumnsDescriptorImpl

public ReferencedColumnsDescriptorImpl(int[] referencedColumns)

Constructor for an ReferencedColumnsDescriptorImpl

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ReferencedColumnsDescriptorImpl

public ReferencedColumnsDescriptorImpl()

Zero-argument constructor for Formatable interface

Method Detail

getReferencedColumnPositions

public int[] getReferencedColumnPositions()

Description copied from interface: org.apache.derby.catalog.ReferencedColumns

Returns an array of 1-based column positions in the table that the check constraint is on.

Specified by:

getReferencedColumnPositions in interface org.apache.derby.catalog.ReferencedColumns

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readExternal

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

Description copied from interface: java.io.Externalizable

This method restores an object's state by reading in the instance data for the object from the passed in stream. Note that this stream is not a subclass of InputStream, but rather is a class that implements the ObjectInput interface. That interface provides a mechanism for reading in Java data types from a stream.

Note that this method must be compatible with writeExternal. It must read back the exact same types that were written by that method in the exact order they were written.

If this method needs to read back an object instance, then the class for that object must be found and loaded. If that operation fails, then this method throws a ClassNotFoundException

Specified by:

readExternal in interface java.io.Externalizable

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writeExternal

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

Description copied from interface: java.io.Externalizable

This method is responsible for writing the instance data of an object to the passed in stream. Note that this stream is not a subclass of OutputStream, but rather is a class that implements the ObjectOutput interface. That interface provides a number of methods for writing Java data values to a stream.

Not that the implementation of this method must be coordinated with the implementation of readExternal.

Specified by:

writeExternal in interface java.io.Externalizable

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getTypeFormatId

public int getTypeFormatId()

Description copied from interface: org.apache.derby.iapi.services.io.TypedFormat

Get a universally unique identifier for the type of this object.

Specified by:

getTypeFormatId in interface org.apache.derby.iapi.services.io.TypedFormat

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toString

public java.lang.String toString()

Description copied from class: java.lang.Object

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> catalog >> [ types overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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