/*******************************************************************************
* Copyright (c) 2000, 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.rubypeople.rdt.internal.core;
import java.io.PrintWriter;
import java.io.Writer;
import java.util.HashMap;
import org.rubypeople.rdt.core.IRubyProject;
import org.rubypeople.rdt.internal.core.util.Util;
/**
* @since 3.0
*/
class XMLWriter extends PrintWriter {
/* constants */
private static final String XML_VERSION= "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"; //$NON-NLS-1$
private static void appendEscapedChar(StringBuffer buffer, char c) {
String replacement= getReplacement(c);
if (replacement != null) {
buffer.append('&');
buffer.append(replacement);
buffer.append(';');
} else {
buffer.append(c);
}
}
private static String getEscaped(String s) {
StringBuffer result= new StringBuffer(s.length() + 10);
for (int i= 0; i < s.length(); ++i)
appendEscapedChar(result, s.charAt(i));
return result.toString();
}
private static String getReplacement(char c) {
// Encode special XML characters into the equivalent character references.
// These five are defined by default for all XML documents.
switch (c) {
case '<' :
return "lt"; //$NON-NLS-1$
case '>' :
return "gt"; //$NON-NLS-1$
case '"' :
return "quot"; //$NON-NLS-1$
case '\'' :
return "apos"; //$NON-NLS-1$
case '&' :
return "amp"; //$NON-NLS-1$
}
return null;
}
private int tab;
private String lineSeparator;
public XMLWriter(Writer writer, IRubyProject project, boolean printXmlVersion) {
super(writer);
this.tab= 0;
this.lineSeparator = Util.getLineSeparator((String) null, project);
if (printXmlVersion) {
print(XML_VERSION);
print(this.lineSeparator);
}
}
public void endTag(String name, boolean insertTab, boolean insertNewLine) {
this.tab --;
printTag('/' + name, null/*no parameters*/, insertTab, insertNewLine, false/*don't close tag*/);
}
private void printTabulation() {
for (int i= 0; i < tab; i++)
super.print('\t');
}
public void printTag(String name, HashMap parameters, boolean insertTab, boolean insertNewLine, boolean closeTag) {
StringBuffer sb= new StringBuffer();
sb.append("<"); //$NON-NLS-1$
sb.append(name);
if (parameters != null) {
int length = parameters.size();
String[] keys = new String[length];
parameters.keySet().toArray(keys);
Util.sort(keys);
for (int i = 0; i < length; i++) {
sb.append(" "); //$NON-NLS-1$
sb.append(keys[i]);
sb.append("=\""); //$NON-NLS-1$
sb.append(getEscaped(String.valueOf(parameters.get(keys[i]))));
sb.append("\""); //$NON-NLS-1$
}
}
if (closeTag) {
sb.append("/>"); //$NON-NLS-1$
} else {
sb.append(">"); //$NON-NLS-1$
}
printString(sb.toString(), insertTab, insertNewLine);
if (parameters != null && !closeTag)
this.tab++;
}
public void printString(String string, boolean insertTab, boolean insertNewLine) {
if (insertTab) {
printTabulation();
}
print(string);
if (insertNewLine) {
print(this.lineSeparator);
}
}
public void startTag(String name, boolean insertTab) {
printTag(name, null/*no parameters*/, insertTab, true/*insert new line*/, false/*don't close tag*/);
this.tab++;
}
}