| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2002 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 acknowlegement: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowlegement may appear in the software itself, |
| * if and wherever such third-party acknowlegements normally appear. |
| * |
| * 4. The names "The Jakarta Project", "Ant", and "Apache Software |
| * Foundation" 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" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Group. |
| * |
| * 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/>. |
| */ |
| package org.apache.ant.antcore.execution; |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import org.apache.ant.common.antlib.Converter; |
| import org.apache.ant.common.util.ExecutionException; |
| |
| /** |
| * AttributeSetters are created at introspection time for each |
| * setter method a class provides and for which a conversion from a |
| * String value is available. |
| * |
| * @author Conor MacNeill |
| * @created 19 January 2002 |
| */ |
| public class AttributeSetter { |
| /** The method that will perform the setting */ |
| private Method method; |
| |
| /** |
| * A converter to convert the string value to a value to be given to |
| * the setter method |
| */ |
| private Converter converter; |
| |
| /** |
| * A constructor used to create the string value to an object to be used |
| * by the setter |
| */ |
| private Constructor valueConstructor; |
| |
| /** The depth of the setter in the class hierarchy */ |
| private int depth; |
| |
| /** |
| * Create a setter which just uses string values |
| * |
| * @param method the method to be invoked. |
| * @param depth the depth of this method declaraion in the class hierarchy. |
| */ |
| public AttributeSetter(Method method, int depth) { |
| this.method = method; |
| this.depth = depth; |
| } |
| |
| /** |
| * Create a setter which just uses string values |
| * |
| * @param method the method to be invoked. |
| * @param depth the depth of this method declaraion in the class hierarchy. |
| * @param converter a converter to convert string values into instances of |
| * the type expected by the method. |
| */ |
| public AttributeSetter(Method method, int depth, Converter converter) { |
| this(method, depth); |
| this.converter = converter; |
| } |
| |
| /** |
| * Create a setter which just uses string values |
| * |
| * @param method the method to be invoked. |
| * @param depth the depth of this method declaraion in the class hierarchy. |
| * @param valueConstructor an object constructor used to convert string |
| * values into instances of the type expected by the method. |
| */ |
| public AttributeSetter(Method method, int depth, |
| Constructor valueConstructor) { |
| this(method, depth); |
| this.valueConstructor = valueConstructor; |
| } |
| |
| /** |
| * Set the attribute value on an object |
| * |
| * @param obj the object on which the set method is to be invoked |
| * @param stringValue the string representation of the value |
| * @exception InvocationTargetException if the method cannot be |
| * invoked |
| * @exception IllegalAccessException if the method cannot be invoked |
| * @exception ExecutionException if the conversion of the value |
| * fails |
| */ |
| void set(Object obj, String stringValue) |
| throws InvocationTargetException, IllegalAccessException, |
| ExecutionException { |
| |
| Object value = null; |
| if (converter != null) { |
| Class type = getType(); |
| value = converter.convert(stringValue, type); |
| } else if (valueConstructor != null) { |
| try { |
| value = valueConstructor.newInstance(new String[]{stringValue}); |
| } catch (InstantiationException e) { |
| throw new ExecutionException(e); |
| } |
| } else { |
| value = stringValue; |
| } |
| |
| method.invoke(obj, new Object[]{value}); |
| } |
| |
| /** |
| * Get the declaration depth of this setter. |
| * |
| * @return the attribute setter's declaration depth. |
| */ |
| public int getDepth() { |
| return depth; |
| } |
| |
| /** |
| * Get the type expected by this setter's method |
| * |
| * @return a Class instance being the type this setter's method accepts. |
| */ |
| public Class getType() { |
| return method.getParameterTypes()[0]; |
| } |
| } |
| |