1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package org.apache.bcel.generic; 19 20 import java.util.Arrays; 21 import java.util.List; 22 23 import org.apache.bcel.Repository; 24 import org.apache.bcel.classfile.JavaClass; 25 import org.apache.bcel.classfile.Method; 26 27 import junit.framework.TestCase; 28 29 public class MethodGenTestCase extends TestCase { 30 31 public static class Foo { bar()32 public void bar() { 33 @SuppressWarnings("unused") 34 final 35 int a = 1; 36 } 37 } 38 39 @interface A { 40 } 41 42 @interface B { 43 } 44 45 public static class Bar { 46 public class Inner { Inner(@ final Object a, @B final Object b)47 public Inner(@A final Object a, @B final Object b) { 48 49 } 50 } 51 } 52 getMethod(final Class<?> cls, final String name)53 private MethodGen getMethod(final Class<?> cls, final String name) throws ClassNotFoundException { 54 final JavaClass jc = Repository.lookupClass(cls); 55 final ConstantPoolGen cp = new ConstantPoolGen(jc.getConstantPool()); 56 for (final Method method : jc.getMethods()) { 57 if (method.getName().equals(name)) { 58 return new MethodGen(method, jc.getClassName(), cp); 59 } 60 } 61 62 fail("Method " + name + " not found in class " + cls); 63 return null; 64 } 65 testRemoveLocalVariable()66 public void testRemoveLocalVariable() throws Exception { 67 final MethodGen mg = getMethod(Foo.class, "bar"); 68 69 final LocalVariableGen lv = mg.getLocalVariables()[1]; 70 assertEquals("variable name", "a", lv.getName()); 71 final InstructionHandle start = lv.getStart(); 72 final InstructionHandle end = lv.getEnd(); 73 assertNotNull("scope start", start); 74 assertNotNull("scope end", end); 75 assertTrue("scope start not targeted by the local variable", Arrays.asList(start.getTargeters()).contains(lv)); 76 assertTrue("scope end not targeted by the local variable", Arrays.asList(end.getTargeters()).contains(lv)); 77 78 // now let's remove the local variable 79 mg.removeLocalVariable(lv); 80 81 assertFalse("scope start still targeted by the removed variable", Arrays.asList(start.getTargeters()).contains(lv)); 82 assertFalse("scope end still targeted by the removed variable", Arrays.asList(end.getTargeters()).contains(lv)); 83 assertNull("scope start", lv.getStart()); 84 assertNull("scope end", lv.getEnd()); 85 } 86 testRemoveLocalVariables()87 public void testRemoveLocalVariables() throws Exception { 88 final MethodGen mg = getMethod(Foo.class, "bar"); 89 90 final LocalVariableGen lv = mg.getLocalVariables()[1]; 91 assertEquals("variable name", "a", lv.getName()); 92 final InstructionHandle start = lv.getStart(); 93 final InstructionHandle end = lv.getEnd(); 94 assertNotNull("scope start", start); 95 assertNotNull("scope end", end); 96 assertTrue("scope start not targeted by the local variable", Arrays.asList(start.getTargeters()).contains(lv)); 97 assertTrue("scope end not targeted by the local variable", Arrays.asList(end.getTargeters()).contains(lv)); 98 99 // now let's remove the local variables 100 mg.removeLocalVariables(); 101 102 assertFalse("scope start still targeted by the removed variable", Arrays.asList(start.getTargeters()).contains(lv)); 103 assertFalse("scope end still targeted by the removed variable", Arrays.asList(end.getTargeters()).contains(lv)); 104 assertNull("scope start", lv.getStart()); 105 assertNull("scope end", lv.getEnd()); 106 } 107 testAnnotationsAreUnpacked()108 public void testAnnotationsAreUnpacked() throws Exception { 109 final JavaClass jc = Repository.lookupClass(Bar.Inner.class); 110 final ClassGen cg = new ClassGen(jc); 111 final MethodGen mg = new MethodGen(cg.getMethodAt(0), cg.getClassName(), cg.getConstantPool()); 112 final List<AnnotationEntryGen> firstParamAnnotations = mg.getAnnotationsOnParameter(0); 113 assertEquals("Wrong number of annotations in the first parameter", 1, firstParamAnnotations.size()); 114 final List<AnnotationEntryGen> secondParamAnnotations = mg.getAnnotationsOnParameter(1); 115 assertEquals("Wrong number of annotations in the second parameter", 1, secondParamAnnotations.size()); 116 } 117 } 118