| /* |
| * 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.bcel.generic; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.apache.bcel.Repository; |
| import org.apache.bcel.classfile.JavaClass; |
| import org.apache.bcel.classfile.Method; |
| import org.junit.jupiter.api.Test; |
| |
| import static org.junit.jupiter.api.Assertions.assertEquals; |
| import static org.junit.jupiter.api.Assertions.assertFalse; |
| import static org.junit.jupiter.api.Assertions.assertNotNull; |
| import static org.junit.jupiter.api.Assertions.assertNull; |
| import static org.junit.jupiter.api.Assertions.assertThrows; |
| import static org.junit.jupiter.api.Assertions.assertTrue; |
| import static org.junit.jupiter.api.Assertions.fail; |
| |
| public class MethodGenTestCase { |
| |
| @interface A { |
| } |
| |
| @interface B { |
| } |
| |
| public static class Bar { |
| public class Inner { |
| public Inner(@A final Object a, @B final Object b) { |
| |
| } |
| } |
| } |
| |
| public static class Foo { |
| public void bar() { |
| @SuppressWarnings("unused") |
| final |
| int a = 1; |
| } |
| } |
| |
| private MethodGen getMethod(final Class<?> cls, final String name) throws ClassNotFoundException { |
| final JavaClass jc = Repository.lookupClass(cls); |
| final ConstantPoolGen cp = new ConstantPoolGen(jc.getConstantPool()); |
| for (final Method method : jc.getMethods()) { |
| if (method.getName().equals(name)) { |
| return new MethodGen(method, jc.getClassName(), cp); |
| } |
| } |
| |
| fail(() -> "Method " + name + " not found in class " + cls); |
| return null; |
| } |
| |
| @Test |
| public void testAnnotationsAreUnpacked() throws Exception { |
| final JavaClass jc = Repository.lookupClass(Bar.Inner.class); |
| final ClassGen cg = new ClassGen(jc); |
| final MethodGen mg = new MethodGen(cg.getMethodAt(0), cg.getClassName(), cg.getConstantPool()); |
| final List<AnnotationEntryGen> firstParamAnnotations = mg.getAnnotationsOnParameter(0); |
| assertEquals(1, firstParamAnnotations.size(), "Wrong number of annotations in the first parameter"); |
| final List<AnnotationEntryGen> secondParamAnnotations = mg.getAnnotationsOnParameter(1); |
| assertEquals(1, secondParamAnnotations.size(), "Wrong number of annotations in the second parameter"); |
| } |
| |
| private void testInvalidNullMethodBody(final String className) throws ClassNotFoundException { |
| final JavaClass jc = Repository.lookupClass(className); |
| final ClassGen classGen = new ClassGen(jc); |
| for (final Method method : jc.getMethods()) { |
| new MethodGen(method, jc.getClassName(), classGen.getConstantPool()); |
| } |
| } |
| |
| @Test |
| public void testInvalidNullMethodBody_EmptyStaticInit() throws Exception { |
| testInvalidNullMethodBody("org.apache.bcel.generic.EmptyStaticInit"); |
| } |
| |
| @Test |
| public void testInvalidNullMethodBody_MailDateFormat() { |
| assertThrows(IllegalStateException.class, () -> testInvalidNullMethodBody("javax.mail.internet.MailDateFormat")); |
| } |
| |
| @Test |
| public void testRemoveLocalVariable() throws Exception { |
| final MethodGen mg = getMethod(Foo.class, "bar"); |
| |
| final LocalVariableGen lv = mg.getLocalVariables()[1]; |
| assertEquals("a", lv.getName(), "variable name"); |
| final InstructionHandle start = lv.getStart(); |
| final InstructionHandle end = lv.getEnd(); |
| assertNotNull(start, "scope start"); |
| assertNotNull(end, "scope end"); |
| assertTrue(Arrays.asList(start.getTargeters()).contains(lv), "scope start not targeted by the local variable"); |
| assertTrue(Arrays.asList(end.getTargeters()).contains(lv), "scope end not targeted by the local variable"); |
| |
| // now let's remove the local variable |
| mg.removeLocalVariable(lv); |
| |
| assertFalse(Arrays.asList(start.getTargeters()).contains(lv), "scope start still targeted by the removed variable"); |
| assertFalse(Arrays.asList(end.getTargeters()).contains(lv), "scope end still targeted by the removed variable"); |
| assertNull(lv.getStart(), "scope start"); |
| assertNull(lv.getEnd(), "scope end"); |
| } |
| |
| @Test |
| public void testRemoveLocalVariables() throws Exception { |
| final MethodGen mg = getMethod(Foo.class, "bar"); |
| |
| final LocalVariableGen lv = mg.getLocalVariables()[1]; |
| assertEquals("a", lv.getName(), "variable name"); |
| final InstructionHandle start = lv.getStart(); |
| final InstructionHandle end = lv.getEnd(); |
| assertNotNull(start, "scope start"); |
| assertNotNull(end, "scope end"); |
| assertTrue(Arrays.asList(start.getTargeters()).contains(lv), "scope start not targeted by the local variable"); |
| assertTrue(Arrays.asList(end.getTargeters()).contains(lv), "scope end not targeted by the local variable"); |
| |
| // now let's remove the local variables |
| mg.removeLocalVariables(); |
| |
| assertFalse(Arrays.asList(start.getTargeters()).contains(lv), "scope start still targeted by the removed variable"); |
| assertFalse(Arrays.asList(end.getTargeters()).contains(lv), "scope end still targeted by the removed variable"); |
| assertNull(lv.getStart(), "scope start"); |
| assertNull(lv.getEnd(), "scope end"); |
| } |
| } |