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docx4j is a library which helps you to work with the Office Open
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package com.topologi.diffx.event.impl;
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import java.io.IOException;
import org.apache.commons.lang.builder.HashCodeBuilder;
import com.topologi.diffx.event.AttributeEvent;
import com.topologi.diffx.event.DiffXEvent;
import com.topologi.diffx.xml.XMLWriter;
/**
* A namespace aware implementation of the attribute event.
*
* @author Christophe Lauret, Jean-Baptiste Reure
* @version 7 April 2005
*/
public final class AttributeEventNSImpl extends DiffXEventBase implements AttributeEvent {
/**
* The namespace URI this attribute belongs to.
*/
private final String uri;
/**
* The name of the attribute.
*/
private final String name;
/**
* The value of the attribute.
*/
private final String value;
/**
* Creates a new attribute event.
*
* @param name The local name of the attribute.
* @param value The value of the attribute.
*
* @throws NullPointerException if any of the argument is null.
*/
public AttributeEventNSImpl(String name, String value) throws NullPointerException {
if (name == null)
throw new NullPointerException("Attribute must have a name.");
if (value == null)
throw new NullPointerException("The attribute value cannot be null, use \"\".");
this.name = name;
this.value = value;
this.uri = null;
}
/**
* Creates a new attribute event.
*
* @param uri The uri of the attribute.
* @param name The local name of the attribute.
* @param value The value of the attribute.
*
* @throws NullPointerException if any of the argument is null.
*/
public AttributeEventNSImpl(String uri, String name, String value) throws NullPointerException {
if (name == null)
throw new NullPointerException("Attribute must have a name.");
if (value == null)
throw new NullPointerException("The attribute value cannot be null, use \"\".");
this.name = name;
this.value = value;
this.uri = uri;
}
/**
* @see com.topologi.diffx.event.AttributeEvent#getName()
*/
public String getName() {
return this.name;
}
/**
* @see com.topologi.diffx.event.AttributeEvent#getURI()
*/
public String getURI() {
return this.uri;
}
/**
* @see com.topologi.diffx.event.AttributeEvent#getValue()
*/
public String getValue() {
return this.value;
}
/**
* @see java.lang.Object#hashCode()
*/
// public int hashCode() {
// return this.name.hashCode() + this.value.hashCode();
// }
private int fHashCode;
@Override public int hashCode() {
if ( fHashCode == 0) {
// you pick a hard-coded, randomly chosen, non-zero, odd number
// ideally different for each class
fHashCode = new HashCodeBuilder(17, 37).
append(this.name).
append(this.uri).
append(this.value).
toHashCode();
}
return fHashCode;
}
/**
* Returns true if the event is a
*
* @param e The event to compare with this event.
*
* @return true if this event is equal to the specified event;
* false otherwise.
*/
public boolean equals(DiffXEvent e) {
if (e.getClass() != this.getClass()) return false;
AttributeEventNSImpl ae = (AttributeEventNSImpl)e;
if (!ae.name.equals(this.name)) return false;
if (!equals(ae.uri, this.uri)) return false;
if (!ae.value.equals(this.value)) return false;
return true;
}
/**
* @see Object#toString()
*/
public String toString() {
return "attribute: "+this.name+"="+this.value+" ["+this.uri+"]";
}
/**
* @see com.topologi.diffx.xml.XMLWritable#toXML(com.topologi.diffx.xml.XMLWriter)
*/
public void toXML(XMLWriter xml) throws IOException {
xml.attribute(this.uri, this.name, this.value);
}
/**
* @see com.topologi.diffx.xml.XMLWritable#toXML(com.topologi.diffx.xml.XMLWriter)
*/
public StringBuffer toXML(StringBuffer xml) throws NullPointerException {
// FIXME: no support for NS????
xml.append(' ');
xml.append(this.name);
xml.append("=\"");
xml.append(ESC.toAttributeValue(this.value));
xml.append('"');
return xml;
}
/**
* Returns true if both namespace URI are null
* or equal.
*
* @param uri1 The first namespace URI.
* @param uri2 The second namespace URI.
*
* @return true if both null or equal;
* false otherwise.
*/
private static boolean equals(String uri1, String uri2) {
if (uri1 == null && uri2 == null) return true;
if (uri1 == null || uri2 == null) return false;
return uri1.equals(uri2);
}
}