content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   * 
   *      http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package mf.org.apache.xerces.xinclude;
  
  import mf.org.apache.xerces.xni.NamespaceContext;
  
  /**
   * This is an implementation of NamespaceContext which is intended to be used for
   * XInclude processing.  It enables each context to be marked as invalid, if necessary,
   * to indicate that the namespaces recorded on those contexts won't be apparent in the
   * resulting infoset.
   *
   * @author Peter McCracken, IBM
   * @version $Id: XIncludeNamespaceSupport.java 447243 2006-09-18 05:15:27Z mrglavas $
   */
  public class XIncludeNamespaceSupport extends MultipleScopeNamespaceSupport {
  
      /**
       * This stores whether or not the context at the matching depth was valid.
       */
      private boolean[] fValidContext = new boolean[8];
  
      /**
       *
       */
      public XIncludeNamespaceSupport() {
          super();
      }
  
      /**
       * @param context
       */
      public XIncludeNamespaceSupport(NamespaceContext context) {
          super(context);
      }
  
      /**
       * Pushes a new context onto the stack.
       */
      @Override
      public void pushContext() {
          super.pushContext();
          if (fCurrentContext + 1 == fValidContext.length) {
              boolean[] contextarray = new boolean[fValidContext.length * 2];
              System.arraycopy(fValidContext, 0, contextarray, 0, fValidContext.length);
              fValidContext = contextarray;
          }
  
          fValidContext[fCurrentContext] = true;
      }
  
      /**
       * This method is used to set a context invalid for XInclude namespace processing.
       * Any context defined by an &lt;include&gt; or &lt;fallback&gt; element is not
       * valid for processing the include parent's [in-scope namespaces]. Thus, contexts
       * defined by these elements are set to invalid by the XInclude processor using
       * this method.
       */
      public void setContextInvalid() {
          fValidContext[fCurrentContext] = false;
      }
  
      /**
       * This returns the namespace URI which was associated with the given pretext, in
       * the context that existed at the include parent of the current element.  The
       * include parent is the last element, before the current one, which was not set
       * to an invalid context using setContextInvalid()
       *
       * @param prefix the prefix of the desired URI
       * @return the URI corresponding to the prefix in the context of the include parent
       */
      public String getURIFromIncludeParent(String prefix) {
          int lastValidContext = fCurrentContext - 1;
          while (lastValidContext > 0 && !fValidContext[lastValidContext]) {
              lastValidContext--;
          }
          return getURI(prefix, lastValidContext);
      }
  }