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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  package org.apache.bcel.verifier.tests;
18  
19  import static org.junit.jupiter.api.Assertions.assertNotNull;
20  
21  import java.io.IOException;
22  import java.io.OutputStream;
23  
24  import org.apache.bcel.Const;
25  import org.apache.bcel.generic.ClassGen;
26  import org.apache.bcel.generic.ConstantPoolGen;
27  import org.apache.bcel.generic.InstructionConst;
28  import org.apache.bcel.generic.InstructionFactory;
29  import org.apache.bcel.generic.InstructionHandle;
30  import org.apache.bcel.generic.InstructionList;
31  import org.apache.bcel.generic.MethodGen;
32  import org.apache.bcel.generic.Type;
33  
34  public abstract class TestReturn03Creator extends TestCreator {
35      private final InstructionFactory instructionFactory;
36      private final ConstantPoolGen constantPoolGen;
37      private final ClassGen classGen;
38      private final Type returnType;
39      private final String genClassSuffix;
40  
41      protected TestReturn03Creator(final Type returnType, final String genClassSuffix) {
42          classGen = new ClassGen(TEST_PACKAGE + ".TestReturn03" + genClassSuffix, "java.lang.Object", "TestReturn03.java", Const.ACC_PUBLIC | Const.ACC_SUPER, new String[] {});
43  
44          constantPoolGen = classGen.getConstantPool();
45          instructionFactory = new InstructionFactory(classGen, constantPoolGen);
46          this.returnType = returnType;
47          this.genClassSuffix = genClassSuffix;
48      }
49  
50      @Override
51      public void create(final OutputStream out) throws IOException {
52          createMethod_0();
53          createMethod_1();
54          classGen.getJavaClass().dump(out);
55      }
56  
57      private void createMethod_0() {
58          final InstructionList il = new InstructionList();
59          final MethodGen method = new MethodGen(Const.ACC_PUBLIC, Type.VOID, Type.NO_ARGS, new String[] {}, "<init>", TEST_PACKAGE + ".TestReturn03", il, constantPoolGen);
60  
61          final InstructionHandle ih_0 = il.append(InstructionFactory.createLoad(Type.OBJECT, 0));
62          assertNotNull(ih_0); // TODO why is this not used
63          il.append(instructionFactory.createInvoke("java.lang.Object", "<init>", Type.VOID, Type.NO_ARGS, Const.INVOKESPECIAL));
64          final InstructionHandle ih_4 = il.append(InstructionFactory.createReturn(Type.VOID));
65          assertNotNull(ih_4); // TODO why is this not used
66          method.setMaxStack();
67          method.setMaxLocals();
68          classGen.addMethod(method.getMethod());
69          il.dispose();
70      }
71  
72      private void createMethod_1() {
73          final InstructionList il = new InstructionList();
74          final MethodGen method = new MethodGen(Const.ACC_PUBLIC | Const.ACC_STATIC, Type.INT, Type.NO_ARGS, new String[] {}, "test3",
75              TEST_PACKAGE + ".TestReturn03" + genClassSuffix, il, constantPoolGen);
76  
77          final InstructionHandle ih_0 = il.append(InstructionConst.ACONST_NULL);
78          assertNotNull(ih_0); // TODO why is this not used
79          il.append(InstructionFactory.createReturn(returnType));
80          method.setMaxStack();
81          method.setMaxLocals();
82          classGen.addMethod(method.getMethod());
83          il.dispose();
84      }
85  }