| /* |
| * 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.myfaces.test.el; |
| |
| import java.lang.reflect.Method; |
| import java.util.ArrayList; |
| import java.util.List; |
| import javax.el.ELContext; |
| import javax.el.ELException; |
| import javax.el.ELResolver; |
| import javax.el.MethodExpression; |
| import javax.el.MethodInfo; |
| import javax.faces.context.FacesContext; |
| |
| /** |
| * <p>Mock implementation of <code>MethodExpression</code>.</p> |
| */ |
| public class MockMethodExpression extends MethodExpression { |
| |
| |
| // ------------------------------------------------------------ Constructors |
| |
| |
| /** |
| * Serial version UID. |
| */ |
| private static final long serialVersionUID = 5694105394290316715L; |
| |
| |
| /** |
| * <p>Construct a new expression for the specified expression string.</p> |
| * |
| * @param expression Expression string to be evaluated |
| * @param signature Parameter signature of the method to be called |
| * @param expectedType Expected type of the result |
| */ |
| public MockMethodExpression(String expression, Class[] signature, Class expectedType) { |
| |
| if (expression == null) { |
| throw new NullPointerException("Expression string cannot be null"); |
| } |
| this.expression = expression; |
| this.signature = signature; |
| this.expectedType = expectedType; |
| parse(); |
| |
| } |
| |
| |
| // ------------------------------------------------------ Instance Variables |
| |
| |
| /** |
| * <p>The parsed elements of this expression.</p> |
| */ |
| private String[] elements = null; |
| |
| |
| /** |
| * <p>The expected result type for <code>getValue()</code> calls.</p> |
| */ |
| private Class expectedType = null; |
| |
| |
| /** |
| * <p>The original expression string used to create this expression.</p> |
| */ |
| private String expression = null; |
| |
| |
| /** |
| * <p>The method signature of the method to be called.</p> |
| */ |
| private Class[] signature = null; |
| |
| |
| // ------------------------------------------------------ Expression Methods |
| |
| |
| /** |
| * <p>Return <code>true</code> if this expression is equal to the |
| * specified expression.</p> |
| * |
| * @param obj Object to be compared |
| */ |
| public boolean equals(Object obj) { |
| |
| if ((obj != null) & (obj instanceof MethodExpression)) { |
| return expression.equals(((MethodExpression) obj).getExpressionString()); |
| } else { |
| return false; |
| } |
| |
| } |
| |
| |
| /** |
| * <p>Return the original String used to create this expression, |
| * unmodified.</p> |
| */ |
| public String getExpressionString() { |
| |
| return this.expression; |
| |
| } |
| |
| |
| /** |
| * <p>Return the hash code for this expression.</p> |
| */ |
| public int hashCode() { |
| |
| return this.expression.hashCode(); |
| |
| } |
| |
| |
| /** |
| * <p>Return <code>true</code> if the expression string for this expression |
| * contains only literal text.</p> |
| */ |
| public boolean isLiteralText() { |
| |
| return (expression.indexOf("${") < 0) && (expression.indexOf("#{") < 0); |
| |
| } |
| |
| |
| // ------------------------------------------------ MethodExpression Methods |
| |
| |
| /** |
| * <p>Evaluate the expression relative to the specified context, |
| * and return information about the actual implementation method.</p> |
| * |
| * @param context ELContext for this evaluation |
| */ |
| public MethodInfo getMethodInfo(ELContext context) { |
| |
| if (context == null) { |
| throw new NullPointerException(); |
| } |
| return new MethodInfo(elements[elements.length - 1], expectedType, signature); |
| |
| } |
| |
| |
| /** |
| * <p>Evaluate the expression relative to the specified ocntext, |
| * and return the result after coercion to the expected result type.</p> |
| * |
| * @param context ELContext for this evaluation |
| * @param params Parameters for this method call |
| */ |
| public Object invoke(ELContext context, Object[] params) { |
| |
| if (context == null) { |
| throw new NullPointerException(); |
| } |
| if (isLiteralText()) { |
| return expression; |
| } |
| |
| FacesContext fcontext = (FacesContext) context.getContext(FacesContext.class); |
| ELResolver resolver = fcontext.getApplication().getELResolver(); |
| Object base = null; |
| for (int i = 0; i < elements.length - 1; i++) { |
| base = resolver.getValue(context, base, elements[i]); |
| } |
| |
| try { |
| Method method = base.getClass().getMethod(elements[elements.length - 1], signature); |
| Object result = method.invoke(base, params); |
| return fcontext.getApplication().getExpressionFactory().coerceToType(result, expectedType); |
| } catch (RuntimeException e) { |
| throw e; |
| } catch (Exception e) { |
| throw new ELException(e); |
| } |
| |
| } |
| |
| |
| // --------------------------------------------------------- Private Methods |
| |
| |
| /** |
| * <p>Parse the expression string into its constituent elemetns.</p> |
| */ |
| private void parse() { |
| |
| if (isLiteralText()) { |
| elements = new String[0]; |
| return; |
| } |
| |
| if (expression.startsWith("${") || expression.startsWith("#{")) { |
| if (expression.endsWith("}")) { |
| String temp = expression.substring(2, expression.length() - 1).replaceAll(" ", ""); |
| List names = new ArrayList(); |
| while (temp.length() > 0) { |
| int period= temp.indexOf("."); |
| if (period >= 0) { |
| names.add(temp.substring(0, period)); |
| temp = temp.substring(period + 1); |
| } else { |
| names.add(temp); |
| temp = ""; |
| } |
| } |
| elements = (String[]) names.toArray(new String[names.size()]); |
| } else { |
| throw new IllegalArgumentException(expression); |
| } |
| } else { |
| throw new IllegalArgumentException(expression); |
| } |
| |
| } |
| |
| |
| } |