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
  13 import java.io.PrintWriter;
  14 import java.io.Writer;
  15 import java.util.Collections;
  16 import java.util.Enumeration;
  17 import java.util.HashMap;
  18
  19 /**
  20  * @since 3.0
  21  */
  22 class XMLWriter extends PrintWriter {
  23         /* constants */
  24         private static final String XML_VERSION = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"; //$NON-NLS-1$
  25
  26         private static void appendEscapedChar(StringBuffer buffer, char c) {
  27                 String replacement = getReplacement(c);
  28                 if (replacement != null) {
  29                         buffer.append('&');
  30                         buffer.append(replacement);
  31                         buffer.append(';');
  32                 } else {
  33                         buffer.append(c);
  34                 }
  35         }
  36
  37         private static String getEscaped(String s) {
  38                 StringBuffer result = new StringBuffer(s.length() + 10);
  39                 for (int i = 0; i < s.length(); ++i)
  40                         appendEscapedChar(result, s.charAt(i));
  41                 return result.toString();
  42         }
  43
  44         private static String getReplacement(char c) {
  45                 // Encode special XML characters into the equivalent character
  46                 // references.
  47                 // These five are defined by default for all XML documents.
  48                 switch (c) {
  49                 case '<':
  50                         return "lt"; //$NON-NLS-1$
  51                 case '>':
  52                         return "gt"; //$NON-NLS-1$
  53                 case '"':
  54                         return "quot"; //$NON-NLS-1$
  55                 case '\'':
  56                         return "apos"; //$NON-NLS-1$
  57                 case '&':
  58                         return "amp"; //$NON-NLS-1$
  59                 }
  60                 return null;
  61         }
  62
  63         private int tab;
  64
  65         public XMLWriter(Writer writer) {
  66                 super(writer);
  67                 tab = 0;
  68                 println(XML_VERSION);
  69         }
  70
  71         public void endTag(String name, boolean insertTab) {
  72                 tab--;
  73                 printTag('/' + name, null, insertTab, true, false);
  74         }
  75
  76         private void printTabulation() {
  77                 for (int i = 0; i < tab; i++)
  78                         super.print('\t');
  79         }
  80
  81         public void printTag(String name, HashMap parameters, boolean insertTab,
  82                         boolean insertNewLine, boolean closeTag) {
  83                 StringBuffer sb = new StringBuffer();
  84                 sb.append("<"); //$NON-NLS-1$
  85                 sb.append(name);
  86                 if (parameters != null) {
  87                         for (Enumeration en = Collections.enumeration(parameters.keySet()); en
  88                                         .hasMoreElements();) {
  89                                 sb.append(" "); //$NON-NLS-1$
  90                                 String key = (String) en.nextElement();
  91                                 sb.append(key);
  92                                 sb.append("=\""); //$NON-NLS-1$
  93                                 sb.append(getEscaped(String.valueOf(parameters.get(key))));
  94                                 sb.append("\""); //$NON-NLS-1$
  95                         }
  96                 }
  97                 if (closeTag) {
  98                         sb.append("/>"); //$NON-NLS-1$
  99                 } else {
 100                         sb.append(">"); //$NON-NLS-1$
 101                 }
 102                 if (insertTab) {
 103                         printTabulation();
 104                 }
 105                 if (insertNewLine) {
 106                         println(sb.toString());
 107                 } else {
 108                         print(sb.toString());
 109                 }
 110         }
 111
 112         public void startTag(String name, boolean insertTab) {
 113                 printTag(name, null, insertTab, true, false);
 114                 tab++;
 115         }
 116 }