| /* |
| * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
| */ |
| /* |
| * 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.classfile; |
| |
| import java.io.DataInput; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import com.sun.org.apache.bcel.internal.Const; |
| |
| /** |
| * Abstract super class for Fieldref, Methodref, InterfaceMethodref and |
| * InvokeDynamic constants. |
| * |
| * @version $Id: ConstantCP.java 1747278 2016-06-07 17:28:43Z britter $ |
| * @see ConstantFieldref |
| * @see ConstantMethodref |
| * @see ConstantInterfaceMethodref |
| * @see ConstantInvokeDynamic |
| */ |
| public abstract class ConstantCP extends Constant { |
| |
| /** |
| * References to the constants containing the class and the field signature |
| */ |
| // Note that this field is used to store the |
| // bootstrap_method_attr_index of a ConstantInvokeDynamic. |
| private int class_index; |
| // This field has the same meaning for all subclasses. |
| private int name_and_type_index; |
| |
| /** |
| * Initialize from another object. |
| */ |
| public ConstantCP(final ConstantCP c) { |
| this(c.getTag(), c.getClassIndex(), c.getNameAndTypeIndex()); |
| } |
| |
| /** |
| * Initialize instance from file data. |
| * |
| * @param tag Constant type tag |
| * @param file Input stream |
| * @throws IOException |
| */ |
| ConstantCP(final byte tag, final DataInput file) throws IOException { |
| this(tag, file.readUnsignedShort(), file.readUnsignedShort()); |
| } |
| |
| /** |
| * @param class_index Reference to the class containing the field |
| * @param name_and_type_index and the field signature |
| */ |
| protected ConstantCP(final byte tag, final int class_index, final int name_and_type_index) { |
| super(tag); |
| this.class_index = class_index; |
| this.name_and_type_index = name_and_type_index; |
| } |
| |
| /** |
| * Dump constant field reference to file stream in binary format. |
| * |
| * @param file Output file stream |
| * @throws IOException |
| */ |
| @Override |
| public final void dump(final DataOutputStream file) throws IOException { |
| file.writeByte(super.getTag()); |
| file.writeShort(class_index); |
| file.writeShort(name_and_type_index); |
| } |
| |
| /** |
| * @return Reference (index) to class this constant refers to. |
| */ |
| public final int getClassIndex() { |
| return class_index; |
| } |
| |
| /** |
| * @param class_index points to Constant_class |
| */ |
| public final void setClassIndex(final int class_index) { |
| this.class_index = class_index; |
| } |
| |
| /** |
| * @return Reference (index) to signature of the field. |
| */ |
| public final int getNameAndTypeIndex() { |
| return name_and_type_index; |
| } |
| |
| /** |
| * @param name_and_type_index points to Constant_NameAndType |
| */ |
| public final void setNameAndTypeIndex(final int name_and_type_index) { |
| this.name_and_type_index = name_and_type_index; |
| } |
| |
| /** |
| * @return Class this field belongs to. |
| */ |
| public String getClass(final ConstantPool cp) { |
| return cp.constantToString(class_index, Const.CONSTANT_Class); |
| } |
| |
| /** |
| * @return String representation. |
| * |
| * not final as ConstantInvokeDynamic needs to modify |
| */ |
| @Override |
| public String toString() { |
| return super.toString() + "(class_index = " + class_index + ", name_and_type_index = " |
| + name_and_type_index + ")"; |
| } |
| } |