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From d..@apache.org
Subject cvs commit: jakarta-commons-sandbox/graph2/src/java/org/apache/commons/graph/factory GraphFactory.java
Date Wed, 08 May 2002 17:38:34 GMT
ddp         02/05/08 10:38:34

  Added:       graph2/src/java/org/apache/commons/graph/factory
                        GraphFactory.java
  Log:
  Moving changes.
  
  Revision  Changes    Path
  1.1                  jakarta-commons-sandbox/graph2/src/java/org/apache/commons/graph/factory/GraphFactory.java
  
  Index: GraphFactory.java
  ===================================================================
  package org.apache.commons.graph.factory;
  
  /* ====================================================================
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2001 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software itself,
   *    if and wherever such third-party acknowledgments normally appear.
   *
   * 4. The names "Apache" and "Apache Software Foundation" and
   *    "Commons" must not be used to endorse or promote products
   *    derived from this software without prior written permission. For
   *    written permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache",
   *    "Commons", nor may "Apache" appear in their name, without
   *    prior written permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  import java.lang.reflect.*;
  
  import org.apache.commons.graph.*;
  import org.apache.commons.graph.contract.*;
  import org.apache.commons.graph.exception.*;
  import org.apache.commons.graph.domain.basic.*;
  
  /**
   * Description of the Class
   */
  public class GraphFactory
  {
  
      /**
       * Constructor for the GraphFactory object
       */
      public GraphFactory() { }
  
      /**
       * makeGraph
       *
       * @param contracts Which contracts to enforce.
       * @param baseGraph Is the actual *GraphImpl which will be at the core of
       *      the Proxy.
       * @param baseGraphType Interface which is returned.
       * @param isWeighted Does the graph handle Weights?
       * @param init Initialization Graph.
       */
      private Object makeGraph(Contract contracts[],
                               InvocationHandler baseGraph,
                               Class baseGraphType,
                               boolean isWeighted)
          throws GraphException
      {
          int interfaceCount = contracts.length;
          interfaceCount++;// BaseGraph Type
          if (isWeighted)
          {
              interfaceCount++;
          }// WeightedGraph Type
  
          Class inter[] = new Class[interfaceCount];
  
          int pos = 0;
          for (pos = 0; pos < contracts.length; pos++)
          {
              inter[pos] = contracts[pos].getInterface();
          }
  
          if (isWeighted)
          {
              inter[pos] = org.apache.commons.graph.WeightedGraph.class;
              pos++;
          }
  
          inter[pos] = baseGraphType;
  
          return Proxy.newProxyInstance(baseGraph.getClass().getClassLoader(),
              inter, baseGraph);
      }
  
      /**
       * makeDirectedGraph
       *
       * @param contracts - Array of Contracts this Graph should meet.
       * @param isWeighted - If true, the Graph will implement the WeightedGraph
       *      interface.
       * @param graph - If it is provided, the graph will initially be equal to
       *      the graph.
       */
      public DirectedGraph makeDirectedGraph(Contract contracts[],
                                             boolean isWeighted,
                                             DirectedGraph graph)
          throws GraphException
      {
          DirectedGraphImpl dgi = null;
  
          if (graph != null)
          {
              dgi = new DirectedGraphImpl(graph);
          }
          else
          {
              dgi = new DirectedGraphImpl();
          }
  
          for (int i = 0; i < contracts.length; i++)
          {
              dgi.addContract(contracts[i]);
          }
  
          return (DirectedGraph)
              makeGraph(contracts,
              dgi, org.apache.commons.graph.DirectedGraph.class,
              isWeighted);
      }
  
      /**
       * makeMutableDirectedGraph
       *
       * @param contracts - Array of Contracts this Graph should meet.
       * @param isWeighted - If true, the Graph will implement the WeightedGraph
       *      interface.
       * @param graph - If it is provided, the graph will initially be equal to
       *      the graph.
       */
      public MutableDirectedGraph
          makeMutableDirectedGraph(Contract contracts[],
                                   boolean isWeighted,
                                   DirectedGraph graph)
          throws GraphException
      {
  
          DirectedGraphImpl dgi = null;
  
          if (graph != null)
          {
              dgi = new DirectedGraphImpl(graph);
          }
          else
          {
              dgi = new DirectedGraphImpl();
          }
  
          for (int i = 0; i < contracts.length; i++)
          {
              dgi.addContract(contracts[i]);
          }
  
          return (MutableDirectedGraph)
              makeGraph(contracts,
              dgi,
              org.apache.commons.graph.MutableDirectedGraph.class,
              isWeighted);
      }
  }
  
  
  

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