NamespaceResolverAsDeclarations


1   package net.sf.saxon.om;
2   
3   import java.util.List  ;
4   import java.util.Iterator  ;
5   import java.util.ArrayList  ;
6   
7   /**
8    * An implentation of NamespaceDeclarations that contains all the inscope namespaces
9    * made available by a NamespaceResolver.
10   */
11  public class NamespaceResolverAsDeclarations implements NamespaceDeclarations {
12  
13      private NamePool pool;
14      private NamespaceResolver resolver;
15      private List   prefixes;
16  
17      public NamespaceResolverAsDeclarations(NamePool pool, NamespaceResolver resolver) {
18          this.pool = pool;
19          this.resolver = resolver;
20          prefixes = new ArrayList  (10);
21          Iterator   iter = resolver.iteratePrefixes();
22          while (iter.hasNext()) {
23              prefixes.add(iter.next());
24          }
25      }
26  
27      /**
28       * Get the number of declarations (and undeclarations) in this list.
29       */
30  
31      public int getLength() {
32          return prefixes.size();
33      }
34  
35      /**
36       * Get the prefix of the n'th declaration (or undeclaration) in the list,
37       * counting from zero.
38       *
39       * @param index the index identifying which declaration is required.
40       * @return the namespace prefix. For a declaration or undeclaration of the
41       *         default namespace, this is the zero-length string.
42       * @throws IndexOutOfBoundsException if the index is out of range.
43       */
44  
45      public String   getPrefix(int index) {
46          return (String  )prefixes.get(index);
47      }
48  
49      /**
50       * Get the namespace URI of the n'th declaration (or undeclaration) in the list,
51       * counting from zero.
52       *
53       * @param index the index identifying which declaration is required.
54       * @return the namespace URI. For a namespace undeclaration, this is the
55       *         zero-length string.
56       * @throws IndexOutOfBoundsException if the index is out of range.
57       */
58  
59      public String   getURI(int index) {
60          return resolver.getURIForPrefix((String  )prefixes.get(index), true);
61      }
62  
63      /**
64       * Get the n'th declaration in the list in the form of a namespace code. Namespace
65       * codes can be translated into a prefix and URI by means of methods in the
66       * NamePool
67       *
68       * @param index the index identifying which declaration is required.
69       * @return the namespace code. This is an integer whose upper half indicates
70       *         the prefix (0 represents the default namespace), and whose lower half indicates
71       *         the URI (0 represents an undeclaration).
72       * @throws IndexOutOfBoundsException if the index is out of range.
73       * @see NamePool#getPrefixFromNamespaceCode(int)
74       * @see NamePool#getURIFromNamespaceCode(int)
75       */
76  
77      public int getNamespaceCode(int index) {
78          String   prefix = getPrefix(index);
79          String   uri = getURI(index);
80          return pool.allocateNamespaceCode(prefix, uri);
81      }
82  
83      /**
84       * Get all the namespace codes, as an array.
85       *
86       * @param buffer a sacrificial array that the method is free to use to contain the result.
87       *               May be null.
88       * @return an integer array containing namespace codes. The array may be filled completely
89       *         with namespace codes, or it may be incompletely filled, in which case a -1 integer acts
90       *         as a terminator.
91       */
92  
93      public int[] getNamespaceCodes(int[] buffer) {
94          if (buffer.length < getLength()) {
95              buffer = new int[getLength()];
96          }
97          for (int i=0; i<getLength(); i++) {
98              buffer[i] = getNamespaceCode(i);
99          }
100         return buffer;
101     }
102 }
103 
104 //
105 // The contents of this file are subject to the Mozilla Public License Version 1.0 (the "License");
106 // you may not use this file except in compliance with the License. You may obtain a copy of the
107 // License at http://www.mozilla.org/MPL/
108 //
109 // Software distributed under the License is distributed on an "AS IS" basis,
110 // WITHOUT WARRANTY OF ANY KIND, either express or implied.
111 // See the License for the specific language governing rights and limitations under the License.
112 //
113 // The Original Code is: all this file.
114 //
115 // The Initial Developer of the Original Code is Michael H. Kay.
116 //
117 // Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
118 //
119 // Contributor(s): none.
120 //
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