2009/05/20 - Apache Shale has been retired.

   /*
    * 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 org.apache.shale.test.mock;
  
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  
  import javax.faces.application.Application;
  import javax.faces.component.StateHolder;
  import javax.faces.component.UIComponentBase;
  import javax.faces.context.FacesContext;
  import javax.faces.el.EvaluationException;
  import javax.faces.el.MethodBinding;
  import javax.faces.el.MethodNotFoundException;
  import javax.faces.el.ReferenceSyntaxException;
  import javax.faces.el.ValueBinding;
  
  /***
   * <p>Mock implementation of <code>MethodBinding</code>.</p>
   *
   * <p>This implementation is subject to the following restrictions:</p>
   * <ul>
   * <li>The portion of the method reference expression before the final
   *     "." must conform to the limitations of {@link MockValueBinding}.</li>
   * <li>The name of the method to be executed cannot be delimited by "[]".</li>
   * </ul>
   */
  
  public class MockMethodBinding extends MethodBinding implements StateHolder {
  
  
      // ------------------------------------------------------------ Constructors
  
      /***
       * <p>Construct a default instance.</p>
       */
      public MockMethodBinding() {
      }
  
  
      /***
       * <p>Construct a configured instance.</p>
       *
       * @param application Application instance for this application
       * @param ref Method binding expression to be parsed
       * @param args Signature of this method
       */
      public MockMethodBinding(Application application, String ref,
                               Class[] args) {
  
          this.application = application;
          this.args = args;
          if (ref.startsWith("#{") && ref.endsWith("}")) {
              ref = ref.substring(2, ref.length() - 1);
          }
          this.ref = ref;
          int period = ref.lastIndexOf(".");
          if (period < 0) {
              throw new ReferenceSyntaxException(ref);
          }
          vb = application.createValueBinding(ref.substring(0, period));
          name = ref.substring(period + 1);
          if (name.length() < 1) {
              throw new ReferenceSyntaxException(ref);
          }
  
      }
  
  
      // ------------------------------------------------------ Instance Variables
  
  
      private Application application;
      private Class args[];
      private String name;
      private String ref;
      private ValueBinding vb;
  
  
      // --------------------------------------------------- MethodBinding Methods
  
  
      /*** {@inheritDoc} */
      public Object invoke(FacesContext context, Object[] params)
         throws EvaluationException, MethodNotFoundException {
 
         if (context == null) {
             throw new NullPointerException();
         }
         Object base = vb.getValue(context);
         if (base == null) {
             throw new EvaluationException("Cannot find object via expression \""
                                           + vb.getExpressionString() + "\"");
         }
         Method method = method(base);
         try {
             return (method.invoke(base, params));
         } catch (IllegalAccessException e) {
             throw new EvaluationException(e);
         } catch (InvocationTargetException e) {
             throw new EvaluationException(e.getTargetException());
         }
 
     }
 
 
     /*** {@inheritDoc} */
     public Class getType(FacesContext context) {
 
         Object base = vb.getValue(context);
         Method method = method(base);
         Class returnType = method.getReturnType();
         if ("void".equals(returnType.getName())) {
             return (null);
         } else {
             return (returnType);
         }
 
     }
 
     /*** {@inheritDoc} */
     public String getExpressionString() {
         return "#{" + ref + "}";
     }
 
     // ----------------------------------------------------- StateHolder Methods
 
 
     /*** {@inheritDoc} */
     public Object saveState(FacesContext context) {
         Object values[] = new Object[4];
         values[0] = name;
         values[1] = ref;
         values[2] = UIComponentBase.saveAttachedState(context, vb);
         values[3] = args;
         return (values);
     }
 
 
     /*** {@inheritDoc} */
     public void restoreState(FacesContext context, Object state) {
         Object values[] = (Object[]) state;
         name = (String) values[0];
         ref = (String) values[1];
         vb = (ValueBinding) UIComponentBase.restoreAttachedState(context, 
                                                                  values[2]);
         args = (Class []) values[3];
     }
 
 
     /***
      * <p>Flag indicating this is a transient instance.</p>
      */
     private boolean transientFlag = false;
 
 
     /*** {@inheritDoc} */
     public boolean isTransient() {
         return (this.transientFlag);
     }
 
 
     /*** {@inheritDoc} */
     public void setTransient(boolean transientFlag) {
         this.transientFlag = transientFlag;
     }
 
     /*** {@inheritDoc} */
     public int hashCode() {
         if (ref == null) {
             return 0;
         } else {
             return ref.hashCode();
         }
     }
 
     /*** {@inheritDoc} */
     public boolean equals(Object otherObj) {
         MockMethodBinding other = null;
 
         if (!(otherObj instanceof MockMethodBinding)) {
             return false;
         }
         other = (MockMethodBinding) otherObj;
         // test object reference equality
         if (this.ref != other.ref) {
             // test object equality
             if (null != this.ref && null != other.ref) {
                 if (!this.ref.equals(other.ref)) {
                     return false;
                 }
             }
             return false;
         }
         // no need to test name, since it flows from ref.
         // test our args array
         if (this.args != other.args) {
             if (this.args.length != other.args.length) {
                 return false;
             }
             for (int i = 0, len = this.args.length; i < len; i++) {
                 if (this.args[i] != other.args[i]) {
                     if (!this.ref.equals(other.ref)) {
                         return false;
                     }
                 }
             }
         }
         return true;
     }
 
 
     // --------------------------------------------------------- Private Methods
 
 
     /***
      * <p>Return the <code>Method</code> to be called.</p>
      *
      * @param base Base object from which to extract the method reference
      */
     Method method(Object base) {
 
         Class clazz = base.getClass();
         try {
             return (clazz.getMethod(name, args));
         } catch (NoSuchMethodException e) {
             throw new MethodNotFoundException(ref + ": " + e.getMessage());
         }
 
     }
 
 
 
 }