| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * 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 com.sun.org.apache.bcel.internal.generic; |
| |
| import com.sun.org.apache.bcel.internal.Const; |
| import com.sun.org.apache.bcel.internal.classfile.ConstantCP; |
| import com.sun.org.apache.bcel.internal.classfile.ConstantNameAndType; |
| import com.sun.org.apache.bcel.internal.classfile.ConstantPool; |
| import com.sun.org.apache.bcel.internal.classfile.ConstantUtf8; |
| |
| /** |
| * Super class for InvokeInstruction and FieldInstruction, since they have |
| * some methods in common! |
| * |
| */ |
| public abstract class FieldOrMethod extends CPInstruction implements LoadClass { |
| |
| /** |
| * Empty constructor needed for Instruction.readInstruction. |
| * Not to be used otherwise. |
| */ |
| FieldOrMethod() { |
| // no init |
| } |
| |
| |
| /** |
| * @param index to constant pool |
| */ |
| protected FieldOrMethod(final short opcode, final int index) { |
| super(opcode, index); |
| } |
| |
| |
| /** @return signature of referenced method/field. |
| */ |
| public String getSignature(final ConstantPoolGen cpg) { |
| final ConstantPool cp = cpg.getConstantPool(); |
| final ConstantCP cmr = (ConstantCP) cp.getConstant(super.getIndex()); |
| final ConstantNameAndType cnat = (ConstantNameAndType) cp.getConstant(cmr.getNameAndTypeIndex()); |
| return ((ConstantUtf8) cp.getConstant(cnat.getSignatureIndex())).getBytes(); |
| } |
| |
| |
| /** @return name of referenced method/field. |
| */ |
| public String getName(final ConstantPoolGen cpg) { |
| final ConstantPool cp = cpg.getConstantPool(); |
| final ConstantCP cmr = (ConstantCP) cp.getConstant(super.getIndex()); |
| final ConstantNameAndType cnat = (ConstantNameAndType) cp.getConstant(cmr.getNameAndTypeIndex()); |
| return ((ConstantUtf8) cp.getConstant(cnat.getNameIndex())).getBytes(); |
| } |
| |
| |
| /** |
| * @return name of the referenced class/interface |
| * @deprecated If the instruction references an array class, |
| * this method will return "java.lang.Object". |
| * For code generated by Java 1.5, this answer is |
| * sometimes wrong (e.g., if the "clone()" method is |
| * called on an array). A better idea is to use |
| * the {@link #getReferenceType(ConstantPoolGen)} method, which correctly distinguishes |
| * between class types and array types. |
| * |
| */ |
| @Deprecated |
| public String getClassName(final ConstantPoolGen cpg) { |
| final ConstantPool cp = cpg.getConstantPool(); |
| final ConstantCP cmr = (ConstantCP) cp.getConstant(super.getIndex()); |
| final String className = cp.getConstantString(cmr.getClassIndex(), Const.CONSTANT_Class); |
| if (className.startsWith("[")) { |
| // Turn array classes into java.lang.Object. |
| return "java.lang.Object"; |
| } |
| return className.replace('/', '.'); |
| } |
| |
| |
| /** @return type of the referenced class/interface |
| * @deprecated If the instruction references an array class, |
| * the ObjectType returned will be invalid. Use |
| * getReferenceType() instead. |
| */ |
| @Deprecated |
| public ObjectType getClassType(final ConstantPoolGen cpg) { |
| return ObjectType.getInstance(getClassName(cpg)); |
| } |
| |
| |
| /** |
| * Gets the reference type representing the class, interface, |
| * or array class referenced by the instruction. |
| * @param cpg the ConstantPoolGen used to create the instruction |
| * @return an ObjectType (if the referenced class type is a class |
| * or interface), or an ArrayType (if the referenced class |
| * type is an array class) |
| */ |
| public ReferenceType getReferenceType(final ConstantPoolGen cpg) { |
| final ConstantPool cp = cpg.getConstantPool(); |
| final ConstantCP cmr = (ConstantCP) cp.getConstant(super.getIndex()); |
| String className = cp.getConstantString(cmr.getClassIndex(), Const.CONSTANT_Class); |
| if (className.startsWith("[")) { |
| return (ArrayType) Type.getType(className); |
| } |
| className = className.replace('/', '.'); |
| return ObjectType.getInstance(className); |
| } |
| |
| |
| /** |
| * Gets the ObjectType of the method return or field. |
| * |
| * @return type of the referenced class/interface |
| * @throws ClassGenException when the field is (or method returns) an array, |
| */ |
| @Override |
| public ObjectType getLoadClassType(final ConstantPoolGen cpg) { |
| final ReferenceType rt = getReferenceType(cpg); |
| if (rt instanceof ObjectType) { |
| return (ObjectType) rt; |
| } |
| throw new ClassGenException(rt.getClass().getCanonicalName() + " " + |
| rt.getSignature() + " does not represent an ObjectType"); |
| } |
| } |