Value - JBOSS Portal 2.4 API 英文版文档

Overview

Package

Class

Tree

Deprecated

Index

Help

PREV CLASS NEXT CLASS

FRAMES NO FRAMES

SUMMARY: NESTED | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

org.jboss.portal.common.value
Class Value

java.lang.Object
  org.jboss.portal.common.value.Value

All Implemented Interfaces:: java.lang.Cloneable, java.io.Serializable

Direct Known Subclasses:: BooleanValue, FloatValue, IntegerValue, StringValue

public abstract class Value
extends java.lang.Object
implements java.io.Serializable, java.lang.Cloneable

A read only interface used to retrieve data. It represents both for mono value and multi values. It must implement equals and hashCode.

The semantics :

storage mono multi

xxx xxx [xxx]

null null [null]

[] null []

[null,..] null [null,..]

["1",..] "1" ["1",..]

storage	mono	multi
xxx	xxx	[xxx]
null	null	[null]

[]	null	[]
[null,..]	null	[null,..]
["1",..]	"1"	["1",..]

See Also:: Serialized Form

Constructor Summary

Value()


Method Summary

java.lang.Object asObject()
          Return the value.

java.lang.Object[] asObjectArray()
          Create a new array and fill it with the values.

java.util.List asObjectList()
          Return an immutable list of objects.

java.lang.String asString()
          Return the value as a string or null if the value is null.

java.lang.String[] asStringArray()
          Creates a new array and fill it with the string values.

java.util.List asStringList()
          Return an immutable list of strings.

java.lang.Object clone()
          Clone this object.

boolean equals(java.lang.Object obj)


protected abstract java.lang.Object[] getObjectArray()
          Return the values as an array of converted object.

int hashCode()


boolean isEmpty()
          Return true if it contains zero value.

abstract boolean isInstanceOf(java.lang.Class clazz)


boolean isMultiValued()
          Return true if it contains more than one value.

boolean isNull()
          Return true if the value is null.

int size()
          Return the size.

java.lang.String toString()


Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Value

public Value()

Method Detail

isInstanceOf

public abstract boolean isInstanceOf(java.lang.Class clazz)

hashCode

public final int hashCode()

equals

public final boolean equals(java.lang.Object obj)

toString

public final java.lang.String toString()

clone

public final java.lang.Object clone()

Clone this object.

Returns:: a clone of this object

isNull

public final boolean isNull()

Return true if the value is null.

asString

public final java.lang.String asString()

Return the value as a string or null if the value is null.

asObject

public final java.lang.Object asObject()

Return the value.

isMultiValued

public final boolean isMultiValued()

Return true if it contains more than one value.

isEmpty

public final boolean isEmpty()

Return true if it contains zero value.

size

public final int size()

Return the size.

asStringArray

public final java.lang.String[] asStringArray()

Creates a new array and fill it with the string values.

asObjectArray

public final java.lang.Object[] asObjectArray()

Create a new array and fill it with the values.

asStringList

public final java.util.List asStringList()

Return an immutable list of strings.

asObjectList

public final java.util.List asObjectList()

Return an immutable list of objects.

getObjectArray

protected abstract java.lang.Object[] getObjectArray()

Return the values as an array of converted object. It must always return a non null array.