Ant example source code file (TypeAdapterTest.java)

This example Ant source code file (TypeAdapterTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Ant tags/keywords

buildexception, buildexception, method, method, myexec, myexec, myrunnable, mytask, no, object, project, reflection, string, string, task

The TypeAdapterTest.java source code

/*
 *  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.tools.ant.taskdefs;

import java.lang.reflect.Method;

import org.apache.tools.ant.BuildFileTest;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.TypeAdapter;


/**
 */
public class TypeAdapterTest extends BuildFileTest {

    public TypeAdapterTest(String name) {
        super(name);
    }

    public void setUp() {
        configureProject("src/etc/testcases/taskdefs/typeadapter.xml");
    }

    public void testTaskAdapter() {
        expectLogContaining("taskadapter", "MyExec called");
    }

    public void testRunAdapter() {
        expectLogContaining("runadapter", "MyRunnable called");
    }

    public void testRunAdapterError() {
        expectBuildExceptionContaining(
            "runadaptererror", "xx", "No public run() method in");
    }

    public void testDelay() {
        expectLogContaining("delay", "MyTask called");
    }

    public void testOnErrorReport() {
        expectLogContaining("onerror.report",
                            "MyTaskNotPresent cannot be found");
    }

    public void testOnErrorIgnore() {
        expectLog("onerror.ignore","");
    }

    public static class MyTask extends Task {
        public void execute() {
            log("MyTask called");
        }
    }

    public static class MyExec {
        private Project project;
        public void setProject(Project project) {
            this.project = project;
        }

        public void execute() {
            project.log("MyExec called");
        }
    }

    public static class MyRunnable {
        private Project project;
        public void setProject(Project project) {
            this.project = project;
        }

        public void run() {
            project.log("MyRunnable called");
        }
    }

    public static class RunnableAdapter
        extends Task implements TypeAdapter
    {
        private String execMethodName = "run";
        private Object proxy;

        public Method getExecuteMethod(Class proxyClass) {
            try {
                Method execMethod = proxyClass.getMethod(
                    execMethodName, null);
                if (!Void.TYPE.equals(execMethod.getReturnType())) {
                    String message =
                        "return type of " + execMethodName + "() should be "
                        + "void but was \"" + execMethod.getReturnType() +
                        "\" in "
                        + proxyClass;
                    log(message, Project.MSG_WARN);
                }
                return execMethod;
            } catch (NoSuchMethodException e) {
                String message = "No public "+ execMethodName +
                    "() method in "
                    + proxyClass;
                log(message, Project.MSG_ERR);
                throw new BuildException(message);
            }
        }
        public void checkProxyClass(Class proxyClass) {
            getExecuteMethod(proxyClass);
        }

        public void setProxy(Object o) {
            getExecuteMethod(o.getClass());
            this.proxy = o;
        }

        public Object getProxy() {
            return proxy;
        }

        public void execute() {
            getProject().setProjectReference(proxy);
            Method executeMethod = getExecuteMethod(proxy.getClass());
            try {
                executeMethod.invoke(proxy, null);
            } catch (java.lang.reflect.InvocationTargetException ie) {
                log("Error in " + proxy.getClass(), Project.MSG_ERR);
                Throwable t = ie.getTargetException();
                if (t instanceof BuildException) {
                    throw ((BuildException) t);
                } else {
                    throw new BuildException(t);
                }
            } catch (Exception ex) {
                log("Error in " + proxy.getClass(), Project.MSG_ERR);
                throw new BuildException(ex);
            }
        }
    }
}