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org.jdom.filter
Class ElementFilter  

java.lang.Object
  org.jdom.filter.AbstractFilter
      org.jdom.filter.ElementFilter

All Implemented Interfaces:

Filter, java.io.Serializable

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public class ElementFilter

extends AbstractFilter

A Filter that only matches org.jdom.Element objects.

Version:

$Revision: 1.18 $, $Date: 2004/09/07 06:37:20 $

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Field Summary
private static java.lang.String	CVS_ID
private  java.lang.String	name           The element name
private  org.jdom.Namespace	namespace           The element namespace

 

Constructor Summary

ElementFilter()           Select only the Elements.

ElementFilter(org.jdom.Namespace namespace)           Select only the Elements with the supplied Namespace.

ElementFilter(java.lang.String name)           Select only the Elements with the supplied name in any Namespace.

ElementFilter(java.lang.String name, org.jdom.Namespace namespace)           Select only the Elements with the supplied name and Namespace.

 

Method Summary
boolean	equals(java.lang.Object obj)           Returns whether the two filters are equivalent (i.e. the matching names and namespace are equivalent).
int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.
boolean	matches(java.lang.Object obj)           Check to see if the object matches a predefined set of rules.
private  void	readObject(java.io.ObjectInputStream in)
private  void	writeObject(java.io.ObjectOutputStream out)

 

Methods inherited from class org.jdom.filter.AbstractFilter

and, negate, or

 

Methods inherited from class java.lang.Object

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

 

Field Detail

CVS_ID

private static final java.lang.String CVS_ID

See Also:

Constant Field Values

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name

private java.lang.String name

The element name

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namespace

private transient org.jdom.Namespace namespace

The element namespace

Constructor Detail

ElementFilter

public ElementFilter()

Select only the Elements.

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ElementFilter

public ElementFilter(java.lang.String name)

Select only the Elements with the supplied name in any Namespace.

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ElementFilter

public ElementFilter(org.jdom.Namespace namespace)

Select only the Elements with the supplied Namespace.

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ElementFilter

public ElementFilter(java.lang.String name,
                     org.jdom.Namespace namespace)

Select only the Elements with the supplied name and Namespace.

Method Detail

matches

public boolean matches(java.lang.Object obj)

Check to see if the object matches a predefined set of rules.

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equals

public boolean equals(java.lang.Object obj)

Returns whether the two filters are equivalent (i.e. the matching names and namespace are equivalent).

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hashCode

public int hashCode()

Description copied from class: java.lang.Object

Get a value that represents this Object, as uniquely as possible within the confines of an int.

There are some requirements on this method which subclasses must follow:

• Semantic equality implies identical hashcodes. In other words, if a.equals(b) is true, then a.hashCode() == b.hashCode() must be as well. However, the reverse is not necessarily true, and two objects may have the same hashcode without being equal.
• It must be consistent. Whichever value o.hashCode() returns on the first invocation must be the value returned on all later invocations as long as the object exists. Notice, however, that the result of hashCode may change between separate executions of a Virtual Machine, because it is not invoked on the same object.

Notice that since hashCode is used in java.util.Hashtable and other hashing classes, a poor implementation will degrade the performance of hashing (so don't blindly implement it as returning a constant!). Also, if calculating the hash is time-consuming, a class may consider caching the results.

The default implementation returns System.identityHashCode(this)

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writeObject

private void writeObject(java.io.ObjectOutputStream out)
                  throws java.io.IOException

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readObject

private void readObject(java.io.ObjectInputStream in)
                 throws java.io.IOException,
                        java.lang.ClassNotFoundException

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