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 java.io.DataOutputStream;
020import java.io.IOException;
021import java.util.ArrayList;
022import java.util.List;
023import java.util.stream.Collectors;
024
025import org.apache.bcel.classfile.ArrayElementValue;
026import org.apache.bcel.classfile.ElementValue;
027import org.apache.commons.lang3.stream.Streams;
028
029/**
030 * @since 6.0
031 */
032public class ArrayElementValueGen extends ElementValueGen {
033    // J5TODO: Should we make this an array or a list? A list would be easier to
034    // modify ...
035    private final List<ElementValueGen> evalues;
036
037    /**
038     * @param value
039     * @param cpool
040     */
041    public ArrayElementValueGen(final ArrayElementValue value, final ConstantPoolGen cpool, final boolean copyPoolEntries) {
042        super(ARRAY, cpool);
043        evalues = new ArrayList<>();
044        final ElementValue[] in = value.getElementValuesArray();
045        for (final ElementValue element : in) {
046            evalues.add(ElementValueGen.copy(element, cpool, copyPoolEntries));
047        }
048    }
049
050    public ArrayElementValueGen(final ConstantPoolGen cp) {
051        super(ARRAY, cp);
052        evalues = new ArrayList<>();
053    }
054
055    public ArrayElementValueGen(final int type, final ElementValue[] elementValues, final ConstantPoolGen cpool) {
056        super(type, cpool);
057        if (type != ARRAY) {
058            throw new IllegalArgumentException("Only element values of type array can be built with this ctor - type specified: " + type);
059        }
060        this.evalues = Streams.of(elementValues).map(e -> ElementValueGen.copy(e, cpool, true)).collect(Collectors.toList());
061    }
062
063    public void addElement(final ElementValueGen gen) {
064        evalues.add(gen);
065    }
066
067    @Override
068    public void dump(final DataOutputStream dos) throws IOException {
069        dos.writeByte(super.getElementValueType()); // u1 type of value (ARRAY == '[')
070        dos.writeShort(evalues.size());
071        for (final ElementValueGen element : evalues) {
072            element.dump(dos);
073        }
074    }
075
076    /**
077     * Return immutable variant of this ArrayElementValueGen
078     */
079    @Override
080    public ElementValue getElementValue() {
081        final ElementValue[] immutableData = new ElementValue[evalues.size()];
082        int i = 0;
083        for (final ElementValueGen element : evalues) {
084            immutableData[i++] = element.getElementValue();
085        }
086        return new ArrayElementValue(super.getElementValueType(), immutableData, getConstantPool().getConstantPool());
087    }
088
089    public List<ElementValueGen> getElementValues() {
090        return evalues;
091    }
092
093    public int getElementValuesSize() {
094        return evalues.size();
095    }
096
097    @Override
098    public String stringifyValue() {
099        final StringBuilder sb = new StringBuilder();
100        sb.append("[");
101        String comma = "";
102        for (final ElementValueGen element : evalues) {
103            sb.append(comma);
104            comma = ",";
105            sb.append(element.stringifyValue());
106        }
107        sb.append("]");
108        return sb.toString();
109    }
110}