    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 *  Unless required by applicable law or agreed to in writing, software
    012 *  distributed under the License is distributed on an "AS IS" BASIS,
    013 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 *  See the License for the specific language governing permissions and
    015 *  limitations under the License.
    016 */
    017package org.apache.bcel.generic;
    018
    019import org.apache.bcel.classfile.ConstantPool;
    020
    021/**
    022 * Super class for the GET/PUTxxx family of instructions.
    023 */
    024public abstract class FieldInstruction extends FieldOrMethod {
    025
    026    /**
    027     * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
    028     */
    029    FieldInstruction() {
    030    }
    031
    032    /**
    033     * @param index to constant pool
    034     */
    035    protected FieldInstruction(final short opcode, final int index) {
    036        super(opcode, index);
    037    }
    038
    039    /**
    040     * @return name of referenced field.
    041     */
    042    public String getFieldName(final ConstantPoolGen cpg) {
    043        return getName(cpg);
    044    }
    045
    046    /**
    047     * @return size of field (1 or 2)
    048     */
    049    protected int getFieldSize(final ConstantPoolGen cpg) {
    050        return Type.size(Type.getTypeSize(getSignature(cpg)));
    051    }
    052
    053    /**
    054     * @return type of field
    055     */
    056    public Type getFieldType(final ConstantPoolGen cpg) {
    057        return Type.getType(getSignature(cpg));
    058    }
    059
    060    /**
    061     * @return return type of referenced field
    062     */
    063    @Override
    064    public Type getType(final ConstantPoolGen cpg) {
    065        return getFieldType(cpg);
    066    }
    067
    068    /**
    069     * @return mnemonic for instruction with symbolic references resolved
    070     */
    071    @Override
    072    public String toString(final ConstantPool cp) {
    073        return org.apache.bcel.Const.getOpcodeName(super.getOpcode()) + " " + cp.constantToString(super.getIndex(), org.apache.bcel.Const.CONSTANT_Fieldref);
    074    }
    075}