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* Copyright 2004 The Apache Software Foundation
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* you may not use this file except in compliance with the License.
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package org.apache.catalina.util;
import java.io.IOException;
import java.io.Writer;
/**
* XMLWriter helper class.
*
* @author <a href="mailto:remm@apache.org">Remy Maucherat</a>
*/
public class XMLWriter {
// -------------------------------------------------------------- Constants
/**
* Opening tag.
*/
public static final int OPENING = 0;
/**
* Closing tag.
*/
public static final int CLOSING = 1;
/**
* Element with no content.
*/
public static final int NO_CONTENT = 2;
// ----------------------------------------------------- Instance Variables
/**
* Buffer.
*/
protected StringBuilder buffer = new StringBuilder();
/**
* Writer.
*/
protected Writer writer = null;
// ----------------------------------------------------------- Constructors
/**
* Constructor.
*/
public XMLWriter() {
}
/**
* Constructor.
*/
public XMLWriter(Writer writer) {
this.writer = writer;
}
// --------------------------------------------------------- Public Methods
/**
* Retrieve generated XML.
*
* @return String containing the generated XML
*/
public String toString() {
return buffer.toString();
}
/**
* Write property to the XML.
*
* @param namespace Namespace
* @param namespaceInfo Namespace info
* @param name Property name
* @param value Property value
*/
public void writeProperty(String namespace, String namespaceInfo,
String name, String value) {
writeElement(namespace, namespaceInfo, name, OPENING);
buffer.append(value);
writeElement(namespace, namespaceInfo, name, CLOSING);
}
/**
* Write property to the XML.
*
* @param namespace Namespace
* @param name Property name
* @param value Property value
*/
public void writeProperty(String namespace, String name, String value) {
writeElement(namespace, name, OPENING);
buffer.append(value);
writeElement(namespace, name, CLOSING);
}
/**
* Write property to the XML.
*
* @param namespace Namespace
* @param name Property name
*/
public void writeProperty(String namespace, String name) {
writeElement(namespace, name, NO_CONTENT);
}
/**
* Write an element.
*
* @param name Element name
* @param namespace Namespace abbreviation
* @param type Element type
*/
public void writeElement(String namespace, String name, int type) {
writeElement(namespace, null, name, type);
}
/**
* Write an element.
*
* @param namespace Namespace abbreviation
* @param namespaceInfo Namespace info
* @param name Element name
* @param type Element type
*/
public void writeElement(String namespace, String namespaceInfo,
String name, int type) {
if ((namespace != null) && (namespace.length() > 0)) {
switch (type) {
case OPENING:
if (namespaceInfo != null) {
buffer.append("<" + namespace + ":" + name + " xmlns:"
+ namespace + "=\""
+ namespaceInfo + "\">");
} else {
buffer.append("<" + namespace + ":" + name + ">");
}
break;
case CLOSING:
buffer.append("</" + namespace + ":" + name + ">\n");
break;
case NO_CONTENT:
default:
if (namespaceInfo != null) {
buffer.append("<" + namespace + ":" + name + " xmlns:"
+ namespace + "=\""
+ namespaceInfo + "\"/>");
} else {
buffer.append("<" + namespace + ":" + name + "/>");
}
break;
}
} else {
switch (type) {
case OPENING:
buffer.append("<" + name + ">");
break;
case CLOSING:
buffer.append("</" + name + ">\n");
break;
case NO_CONTENT:
default:
buffer.append("<" + name + "/>");
break;
}
}
}
/**
* Write text.
*
* @param text Text to append
*/
public void writeText(String text) {
buffer.append(text);
}
/**
* Write data.
*
* @param data Data to append
*/
public void writeData(String data) {
buffer.append("<![CDATA[" + data + "]]>");
}
/**
* Write XML Header.
*/
public void writeXMLHeader() {
buffer.append("<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n");
}
/**
* Send data and reinitializes buffer.
*/
public void sendData()
throws IOException {
if (writer != null) {
writer.write(buffer.toString());
buffer = new StringBuilder();
}
}
}