/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */
/*
 * 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
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package com.sun.org.apache.xpath.internal;

import java.util.Vector;

import com.sun.org.apache.xpath.internal.functions.FuncExtFunction;

/**
 * Interface that XPath objects can call to obtain access to an
 * ExtensionsTable.
 *
 */
public interface ExtensionsProvider
{
  /**
   * Is the extension function available?
   */

  public boolean functionAvailable(String ns, String funcName)
          throws javax.xml.transform.TransformerException;

  /**
   * Is the extension element available?
   */
  public boolean elementAvailable(String ns, String elemName)
          throws javax.xml.transform.TransformerException;

  /**
   * Execute the extension function.
   */
  public Object extFunction(String ns, String funcName,
                            Vector argVec, Object methodKey)
            throws javax.xml.transform.TransformerException;

  /**
   * Execute the extension function.
   */
  public Object extFunction(FuncExtFunction extFunction,
                            Vector argVec)
            throws javax.xml.transform.TransformerException;
}