jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/xml/internal/stream/buffer/stax/NamespaceContexHelper.java@373ffda63c9a (annotated)

src/share/jaxws_classes/com/sun/xml/internal/stream/buffer/stax/NamespaceContexHelper.java@373ffda63c9a (annotated)

src/share/jaxws_classes/com/sun/xml/internal/stream/buffer/stax/NamespaceContexHelper.java

Wed, 27 Apr 2016 01:27:09 +0800

author: aoqi
date: Wed, 27 Apr 2016 01:27:09 +0800
changeset 0: 373ffda63c9a
child 637: 9c07ef4934dd
permissions: -rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/jaxws/
changeset: 657:d47a47f961ee
tag: jdk8u25-b17

 /*
  * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.xml.internal.stream.buffer.stax;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 import com.sun.xml.internal.org.jvnet.staxex.NamespaceContextEx;
 /**
  * A helper class for managing the declaration of namespaces.
  * <p>
  * A namespace is declared on a namespace context.
  * Namespace contexts are pushed on and popped off the namespace context stack.
  * <p>
  * A declared namespace will be in scope iff the context that it was declared on
  * has not been popped off the stack.
  * <p>
  * When instantiated the namespace stack consists of the root namespace context,
  * which contains, by default, the "xml" and "xmlns" declarations.
  * Namespaces may be declarations may be declared on the root context.
  * The root context cannot be popped but can be reset to contain just the
  * "xml" and "xmlns" declarations.
  * <p>
  * Implementation note: determining the prefix from a namespace URI
  * (or vice versa) is efficient when there are few namespace
  * declarations i.e. what is considered to be the case for namespace
  * declarations in 'average' XML documents. The look up of a namespace URI
  * given a prefix is performed in O(n) time. The look up of a prefix given
  * a namespace URI is performed in O(2n) time.
  * <p>
  * The implementation does not scale when there are many namespace
  * declarations. TODO: Use a hash map when there are many namespace
  * declarations.
  *
  * @author Paul.Sandoz@Sun.Com
  */
 final public class NamespaceContexHelper implements NamespaceContextEx {
     private static int DEFAULT_SIZE = 8;
     // The prefixes of the namespace declarations
     private String[] prefixes = new String[DEFAULT_SIZE];
     // The URIs of the namespace declarations
     private String[] namespaceURIs = new String[DEFAULT_SIZE];
     // Current position to store the next namespace declaration
     private int namespacePosition;
     // The namespace contexts
     private int[] contexts = new int[DEFAULT_SIZE];
     // Current position to store the next namespace context
     private int contextPosition;
     /**
      * Create a new NamespaceContexHelper.
      *
      */
     public NamespaceContexHelper() {
         // The default namespace declarations that are always in scope
         prefixes[0] = "xml";
         namespaceURIs[0] = "http://www.w3.org/XML/1998/namespace";
         prefixes[1] = "xmlns";
         namespaceURIs[1] = "http://www.w3.org/2000/xmlns/";
         namespacePosition = 2;
     }
     // NamespaceContext interface
     public String getNamespaceURI(String prefix) {
         if (prefix == null) throw new IllegalArgumentException();
         prefix = prefix.intern();
         for (int i = namespacePosition - 1; i >= 0; i--) {
             final String declaredPrefix = prefixes[i];
             if (declaredPrefix == prefix) {
                 return namespaceURIs[i];
             }
         }
         return "";
     }
     public String getPrefix(String namespaceURI) {
         if (namespaceURI == null) throw new IllegalArgumentException();
         for (int i = namespacePosition - 1; i >= 0; i--) {
             final String declaredNamespaceURI = namespaceURIs[i];
             if (declaredNamespaceURI == namespaceURI || declaredNamespaceURI.equals(namespaceURI)) {
                 final String declaredPrefix = prefixes[i];
                 // Check if prefix is out of scope
                 for (++i; i < namespacePosition; i++)
                     if (declaredPrefix == prefixes[i])
                         return null;
                 return declaredPrefix;
             }
         }
         return null;
     }
     public Iterator getPrefixes(String namespaceURI) {
         if (namespaceURI == null) throw new IllegalArgumentException();
         List<String> l = new ArrayList<String>();
         NAMESPACE_LOOP: for (int i = namespacePosition - 1; i >= 0; i--) {
             final String declaredNamespaceURI = namespaceURIs[i];
             if (declaredNamespaceURI == namespaceURI || declaredNamespaceURI.equals(namespaceURI)) {
                 final String declaredPrefix = prefixes[i];
                 // Check if prefix is out of scope
                 for (int j = i + 1; j < namespacePosition; j++)
                     if (declaredPrefix == prefixes[j])
                         continue NAMESPACE_LOOP;
                 l.add(declaredPrefix);
             }
         }
         return l.iterator();
     }
     // NamespaceContextEx interface
     public Iterator<NamespaceContextEx.Binding> iterator() {
         if (namespacePosition == 2)
             return Collections.EMPTY_LIST.iterator();
         final List<NamespaceContextEx.Binding> namespaces =
                 new ArrayList<NamespaceContextEx.Binding>(namespacePosition);
         NAMESPACE_LOOP: for (int i = namespacePosition - 1; i >= 2; i--) {
             final String declaredPrefix = prefixes[i];
             // Check if prefix is out of scope
             for (int j = i + 1; j < namespacePosition; j++) {
                 if (declaredPrefix == prefixes[j])
                     continue NAMESPACE_LOOP;
                 namespaces.add(new NamespaceBindingImpl(i));
             }
         }
         return namespaces.iterator();
     }
     final private class NamespaceBindingImpl implements NamespaceContextEx.Binding {
         int index;
         NamespaceBindingImpl(int index) {
             this.index = index;
         }
         public String getPrefix() {
             return prefixes[index];
         }
         public String getNamespaceURI() {
             return namespaceURIs[index];
         }
     }
     /**
      * Declare a default namespace.
      * <p>
      * @param namespaceURI the namespace URI to declare, may be null.
      */
     public void declareDefaultNamespace(String namespaceURI) {
         declareNamespace("", namespaceURI);
     }
     /**
      * Declare a namespace.
      * <p>
      * The namespace will be declared on the current namespace context.
      * <p>
      * The namespace can be removed by popping the current namespace
      * context, or, if the declaration occured in the root context, by
      * reseting the namespace context.
      * <p>
      * A default namespace can be declared by passing <code>""</code> as
      * the value of the prefix parameter.
      * A namespace may be undeclared by passing <code>null</code> as the
      * value of the namespaceURI parameter.
      * <p>
      * @param prefix the namespace prefix to declare, may not be null.
      * @param namespaceURI the namespace URI to declare, may be null.
      * @throws IllegalArgumentException, if the prefix is null.
      */
     public void declareNamespace(String prefix, String namespaceURI) {
         if (prefix == null) throw new IllegalArgumentException();
         prefix = prefix.intern();
         // Ignore the "xml" or "xmlns" declarations
         if (prefix == "xml" || prefix == "xmlns")
             return;
         // Check for undeclaration
         if (namespaceURI != null)
             namespaceURI = namespaceURI.intern();
         if (namespacePosition == namespaceURIs.length)
             resizeNamespaces();
         // Add new declaration
         prefixes[namespacePosition] = prefix;
         namespaceURIs[namespacePosition++] = namespaceURI;
     }
     private void resizeNamespaces() {
         final int newLength = namespaceURIs.length * 3 / 2 + 1;
         String[] newPrefixes = new String[newLength];
         System.arraycopy(prefixes, 0, newPrefixes, 0, prefixes.length);
         prefixes = newPrefixes;
         String[] newNamespaceURIs = new String[newLength];
         System.arraycopy(namespaceURIs, 0, newNamespaceURIs, 0, namespaceURIs.length);
         namespaceURIs = newNamespaceURIs;
     }
     /**
      * Push a namespace context on the stack.
      */
     public void pushContext() {
         if (contextPosition == contexts.length)
             resizeContexts();
         contexts[contextPosition++] = namespacePosition;
     }
     private void resizeContexts() {
         int[] newContexts = new int[contexts.length * 3 / 2 + 1];
         System.arraycopy(contexts, 0, newContexts, 0, contexts.length);
         contexts = newContexts;
     }
     /**
      * Pop the namespace context off the stack.
      * <p>
      * Namespaces declared within the context (to be popped)
      * will be removed and no longer be in scope.
      */
     public void popContext() {
         if (contextPosition > 0) {
             namespacePosition = contexts[--contextPosition];
         }
     }
     /**
      * Reset namespace contexts.
      * <p>
      * Pop all namespace contexts and reset the root context.
      */
     public void resetContexts() {
         namespacePosition = 2;
     }
 }

Mercurial > jdk8-mips64-public > jaxws / annotate

src/share/jaxws_classes/com/sun/xml/internal/stream/buffer/stax/NamespaceContexHelper.java@373ffda63c9a (annotated)

src/share/jaxws_classes/com/sun/xml/internal/stream/buffer/stax/NamespaceContexHelper.java