content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE 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 for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 1999-2005 The Apache Software Foundation.
   *
   * Licensed 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.
   */
  /*
   * $Id: FuncExtFunctionAvailable.java,v 1.2.4.1 2005/09/14 20:05:08 jeffsuttor Exp $
   */
  package jaxp.sun.org.apache.xpath.internal.functions;
  
  import jaxp.sun.org.apache.xalan.internal.templates.Constants;
  import jaxp.sun.org.apache.xpath.internal.ExtensionsProvider;
  import jaxp.sun.org.apache.xpath.internal.XPathContext;
  import jaxp.sun.org.apache.xpath.internal.compiler.FunctionTable;
  import jaxp.sun.org.apache.xpath.internal.objects.XBoolean;
  import jaxp.sun.org.apache.xpath.internal.objects.XObject;
  import jaxp.xml.transform.TransformerException;
  
  /**
   * Execute the ExtFunctionAvailable() function.
   * @xsl.usage advanced
   */
  public class FuncExtFunctionAvailable extends FunctionOneArg
  {
      static final long serialVersionUID = 5118814314918592241L;
  
      transient private FunctionTable m_functionTable = null;
  
    /**
     * Execute the function.  The function must return
     * a valid object.
     * @param xctxt The current execution context.
     * @return A valid XObject.
     *
     * @throws TransformerException
     */
    public XObject execute(XPathContext xctxt) throws TransformerException
    {
  
      String prefix;
      String namespace;
      String methName;
  
      String fullName = m_arg0.execute(xctxt).str();
      int indexOfNSSep = fullName.indexOf(':');
  
      if (indexOfNSSep < 0)
      {
        prefix = "";
        namespace = Constants.S_XSLNAMESPACEURL;
        methName = fullName;
      }
      else
      {
        prefix = fullName.substring(0, indexOfNSSep);
        namespace = xctxt.getNamespaceContext().getNamespaceForPrefix(prefix);
        if (null == namespace)
          return XBoolean.S_FALSE;
          methName = fullName.substring(indexOfNSSep + 1);
      }
  
      if (namespace.equals(Constants.S_XSLNAMESPACEURL))
      {
        try
        {
          if (null == m_functionTable) m_functionTable = new FunctionTable();
          return m_functionTable.functionAvailable(methName) ? XBoolean.S_TRUE : XBoolean.S_FALSE;
        }
        catch (Exception e)
        {
          return XBoolean.S_FALSE;
        }
      }
      else
      {
        //dml
        ExtensionsProvider extProvider = (ExtensionsProvider)xctxt.getOwnerObject();
        return extProvider.functionAvailable(namespace, methName)
               ? XBoolean.S_TRUE : XBoolean.S_FALSE;
      }
    }
  
    /**
     * The function table is an instance field. In order to access this instance
     * field during evaluation, this method is called at compilation time to
     * insert function table information for later usage. It should only be used
     * during compiling of XPath expressions.
     * @param aTable an instance of the function table
     */
    public void setFunctionTable(FunctionTable aTable){
            m_functionTable = aTable;
    }
  }
  