    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 *
    017 */
    018package org.apache.bcel.generic;
    019
    020import org.apache.bcel.classfile.ConstantPool;
    021
    022/**
    023 * Super class for the GET/PUTxxx family of instructions.
    024 *
    025 */
    026public abstract class FieldInstruction extends FieldOrMethod {
    027
    028    /**
    029     * Empty constructor needed for Instruction.readInstruction.
    030     * Not to be used otherwise.
    031     */
    032    FieldInstruction() {
    033    }
    034
    035
    036    /**
    037     * @param index to constant pool
    038     */
    039    protected FieldInstruction(final short opcode, final int index) {
    040        super(opcode, index);
    041    }
    042
    043
    044    /**
    045     * @return mnemonic for instruction with symbolic references resolved
    046     */
    047    @Override
    048    public String toString( final ConstantPool cp ) {
    049        return org.apache.bcel.Const.getOpcodeName(super.getOpcode()) + " "
    050                + cp.constantToString(super.getIndex(), org.apache.bcel.Const.CONSTANT_Fieldref);
    051    }
    052
    053
    054    /** @return size of field (1 or 2)
    055     */
    056    protected int getFieldSize( final ConstantPoolGen cpg ) {
    057        return Type.size(Type.getTypeSize(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 type of field
    070     */
    071    public Type getFieldType( final ConstantPoolGen cpg ) {
    072        return Type.getType(getSignature(cpg));
    073    }
    074
    075
    076    /** @return name of referenced field.
    077     */
    078    public String getFieldName( final ConstantPoolGen cpg ) {
    079        return getName(cpg);
    080    }
    081}