com.progress.open4gl

Class Holder

java.lang.Object

com.progress.open4gl.Holder

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

BigDecimalArrayHolder, BigDecimalHolder, BooleanArrayHolder, BooleanHolder, ByteArrayArrayHolder, ByteArrayHolder, COMHandleArrayHolder, COMHandleHolder, DateArrayHolder, DateHolder, HandleArrayHolder, HandleHolder, IntArrayHolder, IntHolder, LongArrayHolder, LongHolder, MemptrArrayHolder, MemptrHolder, ProDataGraphHolder, ResultSetHolder, RowidArrayHolder, RowidHolder, StringArrayHolder, StringHolder

public class Holder
extends java.lang.Object
implements java.io.Serializable

The Holder class is the super class for all the different holder classes. Holder objects are used to pass OUTPUT and INPUT-OUTPUT values from Java to the 4GL through proxy methods (since the Java language does not support output parameters). There is one holder class for each 4GL data type. Null values correspond to the 4GL UNKNOWN value.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Holder()
Holder(java.lang.Object o)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	getValue()
boolean	isNull()
void	setValue(java.lang.Object o)

Methods inherited from class java.lang.Object

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

Constructor Detail

Holder

public Holder()

Holder

public Holder(java.lang.Object o)

Method Detail

setValue

public void setValue(java.lang.Object o)

getValue

public java.lang.Object getValue()

isNull

public boolean isNull()