Package org.codehaus.groovy.classgen

Source Code of org.codehaus.groovy.classgen.ForTest

/*
* Copyright 2003-2011 the original author or authors.
*
* Licensed 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.codehaus.groovy.classgen;

import org.codehaus.groovy.ast.*;
import org.codehaus.groovy.ast.expr.VariableExpression;
import org.codehaus.groovy.ast.stmt.BlockStatement;
import org.codehaus.groovy.ast.stmt.ForStatement;
import org.codehaus.groovy.ast.stmt.Statement;
import org.codehaus.groovy.runtime.InvokerHelper;
import org.codehaus.groovy.runtime.InvokerInvocationException;

/**
* @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
* @author Pilho Kim
* @version $Revision$
*/
public class ForTest extends TestSupport {

    public void testNonLoop() throws Exception {
        ClassNode classNode = new ClassNode("Foo", ACC_PUBLIC, ClassHelper.OBJECT_TYPE);
        classNode.addConstructor(new ConstructorNode(ACC_PUBLIC, null));

        Parameter[] parameters = {new Parameter(ClassHelper.OBJECT_TYPE, "coll")};

        Statement statement = createPrintlnStatement(new VariableExpression("coll"));
        classNode.addMethod(new MethodNode("oneParamDemo", ACC_PUBLIC, ClassHelper.VOID_TYPE, parameters, ClassNode.EMPTY_ARRAY, statement));

        Class fooClass = loadClass(classNode);
        assertTrue("Loaded a new class", fooClass != null);

        Object bean = fooClass.newInstance();
        assertTrue("Managed to create bean", bean != null);

        System.out.println("################ Now about to invoke a method without looping");
        Object value = new Integer(10000);

        try {
            InvokerHelper.invokeMethod(bean, "oneParamDemo", new Object[]{value});
        } catch (InvokerInvocationException e) {
            System.out.println("Caught: " + e.getCause());
            e.getCause().printStackTrace();
            fail("Should not have thrown an exception");
        }
        System.out.println("################ Done");
    }


    public void testLoop() throws Exception {
        ClassNode classNode = new ClassNode("Foo", ACC_PUBLIC, ClassHelper.OBJECT_TYPE);
        classNode.addConstructor(new ConstructorNode(ACC_PUBLIC, null));

        Parameter[] parameters = {new Parameter(ClassHelper.OBJECT_TYPE.makeArray(), "coll")};

        Statement loopStatement = createPrintlnStatement(new VariableExpression("i"));

        ForStatement statement = new ForStatement(new Parameter(ClassHelper.OBJECT_TYPE, "i"), new VariableExpression("coll"), loopStatement);
        classNode.addMethod(new MethodNode("iterateDemo", ACC_PUBLIC, ClassHelper.VOID_TYPE, parameters, ClassNode.EMPTY_ARRAY, statement));

        Class fooClass = loadClass(classNode);
        assertTrue("Loaded a new class", fooClass != null);

        Object bean = fooClass.newInstance();
        assertTrue("Managed to create bean", bean != null);

        System.out.println("################ Now about to invoke a method with looping");
        Object[] array = {new Integer(1234), "abc", "def"};

        try {
            InvokerHelper.invokeMethod(bean, "iterateDemo", new Object[]{array});
        } catch (InvokerInvocationException e) {
            System.out.println("Caught: " + e.getCause());
            e.getCause().printStackTrace();
            fail("Should not have thrown an exception");
        }
        System.out.println("################ Done");
    }

    public void testManyParam() throws Exception {
        ClassNode classNode = new ClassNode("Foo", ACC_PUBLIC, ClassHelper.OBJECT_TYPE);
        classNode.addConstructor(new ConstructorNode(ACC_PUBLIC, null));

        Parameter[] parameters = {new Parameter(ClassHelper.OBJECT_TYPE, "coll1"), new Parameter(ClassHelper.OBJECT_TYPE, "coll2"), new Parameter(ClassHelper.OBJECT_TYPE, "coll3")};

        BlockStatement statement = new BlockStatement();
        statement.addStatement(createPrintlnStatement(new VariableExpression("coll1")));
        statement.addStatement(createPrintlnStatement(new VariableExpression("coll2")));
        statement.addStatement(createPrintlnStatement(new VariableExpression("coll3")));

        classNode.addMethod(new MethodNode("manyParamDemo", ACC_PUBLIC, ClassHelper.VOID_TYPE, parameters, ClassNode.EMPTY_ARRAY, statement));

        Class fooClass = loadClass(classNode);
        assertTrue("Loaded a new class", fooClass != null);

        Object bean = fooClass.newInstance();
        assertTrue("Managed to create bean", bean != null);

        System.out.println("################ Now about to invoke a method with many parameters");
        Object[] array = {new Integer(1000 * 1000), "foo-", "bar~"};

        try {
            InvokerHelper.invokeMethod(bean, "manyParamDemo", array);
        } catch (InvokerInvocationException e) {
            System.out.println("Caught: " + e.getCause());
            e.getCause().printStackTrace();
            fail("Should not have thrown an exception");
        }
        System.out.println("################ Done");
    }
}
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