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/*
* Copyright (c) 2017, 2019, 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 ConstantFieldref
* @see ConstantMethodref
* @see ConstantInterfaceMethodref
* @see ConstantInvokeDynamic
* @LastModified: Jun 2019
*/
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 + ")";
}
}