net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/core/XMLWriter.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2004 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.core;
  12 import java.io.PrintWriter;
  13 import java.io.Writer;
  14 import java.util.Collections;
  15 import java.util.Enumeration;
  16 import java.util.HashMap;
  17 /**
  18  * @since 3.0
  19  */
  20 class XMLWriter extends PrintWriter {
  21         /* constants */
  22         private static final String XML_VERSION= "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"; //$NON-NLS-1$
  23         private static void appendEscapedChar(StringBuffer buffer, char c) {
  24                 String replacement= getReplacement(c);
  25                 if (replacement != null) {
  26                         buffer.append('&');
  27                         buffer.append(replacement);
  28                         buffer.append(';');
  29                 } else {
  30                         buffer.append(c);
  31                 }
  32         }
  33         private static String getEscaped(String s) {
  34                 StringBuffer result= new StringBuffer(s.length() + 10);
  35                 for (int i= 0; i < s.length(); ++i)
  36                         appendEscapedChar(result, s.charAt(i));
  37                 return result.toString();
  38         }
  39         private static String getReplacement(char c) {
  40                 // Encode special XML characters into the equivalent character references.
  41                 // These five are defined by default for all XML documents.
  42                 switch (c) {
  43                         case '<' :
  44                                 return "lt"; //$NON-NLS-1$
  45                         case '>' :
  46                                 return "gt"; //$NON-NLS-1$
  47                         case '"' :
  48                                 return "quot"; //$NON-NLS-1$
  49                         case '\'' :
  50                                 return "apos"; //$NON-NLS-1$
  51                         case '&' :
  52                                 return "amp"; //$NON-NLS-1$
  53                 }
  54                 return null;
  55         }
  56         private int tab;
  57         public XMLWriter(Writer writer) {
  58                 super(writer);
  59                 tab= 0;
  60                 println(XML_VERSION);
  61         }
  62         public void endTag(String name, boolean insertTab) {
  63                 tab--;
  64                 printTag('/' + name, null, insertTab, true, false);
  65         }
  66         private void printTabulation() {
  67                 for (int i= 0; i < tab; i++)
  68                         super.print('\t');
  69         }
  70         public void printTag(String name, HashMap parameters, boolean insertTab, boolean insertNewLine, boolean closeTag) {
  71                 StringBuffer sb= new StringBuffer();
  72                 sb.append("<"); //$NON-NLS-1$
  73                 sb.append(name);
  74                 if (parameters != null) {
  75                         for (Enumeration en = Collections.enumeration(parameters.keySet()); en.hasMoreElements();) {
  76                                 sb.append(" "); //$NON-NLS-1$
  77                                 String key= (String) en.nextElement();
  78                                 sb.append(key);
  79                                 sb.append("=\""); //$NON-NLS-1$
  80                                 sb.append(getEscaped(String.valueOf(parameters.get(key))));
  81                                 sb.append("\""); //$NON-NLS-1$
  82                         }
  83                 }
  84                 if (closeTag) {
  85                         sb.append("/>"); //$NON-NLS-1$
  86                 } else {
  87                         sb.append(">"); //$NON-NLS-1$
  88                 }
  89                 if (insertTab) {
  90                         printTabulation();
  91                 }
  92                 if (insertNewLine) {
  93                         println(sb.toString());
  94                 } else {
  95                         print(sb.toString());
  96                 }
  97         }
  98         public void startTag(String name, boolean insertTab) {
  99                 printTag(name, null, insertTab, true, false);
 100                 tab++;
 101         }
 102 }