/*
 * 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.
See Also:
Version:$Id: ConstantCP.java 1747278 2016-06-07 17:28:43Z britter $
/** * 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
/** * 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.
/** * Initialize from another object. */
public ConstantCP(final ConstantCP c) { this(c.getTag(), c.getClassIndex(), c.getNameAndTypeIndex()); }
Initialize instance from file data.
Params:
  • tag – Constant type tag
  • file – Input stream
Throws:
/** * 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()); }
Params:
  • class_index – Reference to the class containing the field
  • name_and_type_index – and the field signature
/** * @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.
Params:
  • file – Output file stream
Throws:
/** * 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); }
Returns:Reference (index) to class this constant refers to.
/** * @return Reference (index) to class this constant refers to. */
public final int getClassIndex() { return class_index; }
Params:
  • class_index – points to Constant_class
/** * @param class_index points to Constant_class */
public final void setClassIndex(final int class_index) { this.class_index = class_index; }
Returns:Reference (index) to signature of the field.
/** * @return Reference (index) to signature of the field. */
public final int getNameAndTypeIndex() { return name_and_type_index; }
Params:
  • name_and_type_index – points to Constant_NameAndType
/** * @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; }
Returns:Class this field belongs to.
/** * @return Class this field belongs to. */
public String getClass(final ConstantPool cp) { return cp.constantToString(class_index, Const.CONSTANT_Class); }
Returns:String representation. not final as ConstantInvokeDynamic needs to modify
/** * @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 + ")"; } }