    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one
    003 * or more contributor license agreements.  See the NOTICE file
    004 * distributed with this work for additional information
    005 * regarding copyright ownership.  The ASF licenses this file
    006 * to you under the Apache License, Version 2.0 (the
    007 * "License"); you may not use this file except in compliance
    008 * with the License.  You may obtain a copy of the License at
    009 *
    010 *   https://www.apache.org/licenses/LICENSE-2.0
    011 *
    012 * Unless required by applicable law or agreed to in writing,
    013 * software distributed under the License is distributed on an
    014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    015 * KIND, either express or implied.  See the License for the
    016 * specific language governing permissions and limitations
    017 * under the License.
    018 */
    019package org.apache.commons.compress.harmony.unpack200;
    020
    021import java.util.ArrayList;
    022import java.util.Arrays;
    023import java.util.Iterator;
    024import java.util.List;
    025
    026import org.apache.commons.compress.harmony.unpack200.bytecode.AnnotationDefaultAttribute;
    027import org.apache.commons.compress.harmony.unpack200.bytecode.AnnotationsAttribute.Annotation;
    028import org.apache.commons.compress.harmony.unpack200.bytecode.AnnotationsAttribute.ElementValue;
    029import org.apache.commons.compress.harmony.unpack200.bytecode.Attribute;
    030import org.apache.commons.compress.harmony.unpack200.bytecode.CPDouble;
    031import org.apache.commons.compress.harmony.unpack200.bytecode.CPFloat;
    032import org.apache.commons.compress.harmony.unpack200.bytecode.CPInteger;
    033import org.apache.commons.compress.harmony.unpack200.bytecode.CPLong;
    034import org.apache.commons.compress.harmony.unpack200.bytecode.CPUTF8;
    035import org.apache.commons.compress.harmony.unpack200.bytecode.RuntimeVisibleorInvisibleAnnotationsAttribute;
    036import org.apache.commons.compress.harmony.unpack200.bytecode.RuntimeVisibleorInvisibleParameterAnnotationsAttribute;
    037import org.apache.commons.compress.harmony.unpack200.bytecode.RuntimeVisibleorInvisibleParameterAnnotationsAttribute.ParameterAnnotation;
    038
    039/**
    040 * A group of metadata bands, such as class_RVA_bands, method_AD_bands etc.
    041 */
    042public class MetadataBandGroup {
    043
    044    private static CPUTF8 rvaUTF8;
    045    private static CPUTF8 riaUTF8;
    046
    047    private static CPUTF8 rvpaUTF8;
    048    private static CPUTF8 ripaUTF8;
    049
    050    public static void setRiaAttributeName(final CPUTF8 cpUTF8Value) {
    051        riaUTF8 = cpUTF8Value;
    052    }
    053
    054    public static void setRipaAttributeName(final CPUTF8 cpUTF8Value) {
    055        ripaUTF8 = cpUTF8Value;
    056    }
    057
    058    public static void setRvaAttributeName(final CPUTF8 cpUTF8Value) {
    059        rvaUTF8 = cpUTF8Value;
    060    }
    061
    062    public static void setRvpaAttributeName(final CPUTF8 cpUTF8Value) {
    063        rvpaUTF8 = cpUTF8Value;
    064    }
    065
    066    private final String type;
    067
    068    private final CpBands cpBands;
    069
    070    private List<Attribute> attributes;
    071
    072    public int[] param_NB;
    073
    074    public int[] anno_N;
    075    public CPUTF8[][] type_RS;
    076    public int[][] pair_N;
    077    public CPUTF8[] name_RU;
    078    public int[] T;
    079    public CPInteger[] caseI_KI;
    080    public CPDouble[] caseD_KD;
    081    public CPFloat[] caseF_KF;
    082    public CPLong[] caseJ_KJ;
    083    public CPUTF8[] casec_RS;
    084    public String[] caseet_RS;
    085    public String[] caseec_RU;
    086    public CPUTF8[] cases_RU;
    087    public int[] casearray_N;
    088    public CPUTF8[] nesttype_RS;
    089    public int[] nestpair_N;
    090    public CPUTF8[] nestname_RU;
    091    private int caseI_KI_Index;
    092
    093    private int caseD_KD_Index;
    094
    095    private int caseF_KF_Index;
    096
    097    private int caseJ_KJ_Index;
    098
    099    private int casec_RS_Index;
    100
    101    private int caseet_RS_Index;
    102
    103    private int caseec_RU_Index;
    104
    105    private int cases_RU_Index;
    106
    107    private int casearray_N_Index;
    108
    109    private int T_index;
    110
    111    private int nesttype_RS_Index;
    112
    113    private int nestpair_N_Index;
    114
    115    private Iterator<CPUTF8> nestname_RU_Iterator;
    116
    117    private int anno_N_Index;
    118
    119    private int pair_N_Index;
    120
    121    public MetadataBandGroup(final String type, final CpBands cpBands) {
    122        this.type = type;
    123        this.cpBands = cpBands;
    124    }
    125
    126    /**
    127     * Gets a new Annotation.
    128     *
    129     * @param numPairs      Number of pairs, matches the lengths of {@code elementNames} and {@code elementValues} in the new Annotation.
    130     * @param type          Type.
    131     * @param namesIterator Iterates names to create pairs.
    132     */
    133    private Annotation getAnnotation(final CPUTF8 type, final int pairCount, final Iterator<CPUTF8> namesIterator) {
    134        final CPUTF8[] elementNames = new CPUTF8[pairCount];
    135        final ElementValue[] elementValues = new ElementValue[pairCount];
    136        for (int j = 0; j < elementNames.length; j++) {
    137            elementNames[j] = namesIterator.next();
    138            final int t = T[T_index++];
    139            elementValues[j] = new ElementValue(t, getNextValue(t));
    140        }
    141        return new Annotation(pairCount, type, elementNames, elementValues);
    142    }
    143
    144    private Attribute getAttribute(final int numAnnotations, final CPUTF8[] types, final int[] pairCounts, final Iterator<CPUTF8> namesIterator) {
    145        final Annotation[] annotations = new Annotation[numAnnotations];
    146        Arrays.setAll(annotations, i -> getAnnotation(types[i], pairCounts[i], namesIterator));
    147        return new RuntimeVisibleorInvisibleAnnotationsAttribute(type.equals("RVA") ? rvaUTF8 : riaUTF8, annotations);
    148    }
    149
    150    public List<Attribute> getAttributes() {
    151        // TODO: Optimize iterators!
    152        if (attributes == null) {
    153            attributes = new ArrayList<>();
    154            if (name_RU != null) {
    155                final Iterator<CPUTF8> name_RU_Iterator = Arrays.asList(name_RU).iterator();
    156                if (!type.equals("AD")) {
    157                    T_index = 0;
    158                }
    159                caseI_KI_Index = 0;
    160                caseD_KD_Index = 0;
    161                caseF_KF_Index = 0;
    162                caseJ_KJ_Index = 0;
    163                casec_RS_Index = 0;
    164                caseet_RS_Index = 0;
    165                caseec_RU_Index = 0;
    166                cases_RU_Index = 0;
    167                casearray_N_Index = 0;
    168                nesttype_RS_Index = 0;
    169                nestpair_N_Index = 0;
    170                nestname_RU_Iterator = Arrays.asList(nestname_RU).iterator();
    171                if (type.equals("RVA") || type.equals("RIA")) {
    172                    for (int i = 0; i < anno_N.length; i++) {
    173                        attributes.add(getAttribute(anno_N[i], type_RS[i], pair_N[i], name_RU_Iterator));
    174                    }
    175                } else if (type.equals("RVPA") || type.equals("RIPA")) {
    176                    anno_N_Index = 0;
    177                    pair_N_Index = 0;
    178                    for (final int element : param_NB) {
    179                        attributes.add(getParameterAttribute(element, name_RU_Iterator));
    180                    }
    181                }
    182            } else if (type.equals("AD")) {
    183                for (final int element : T) {
    184                    attributes.add(new AnnotationDefaultAttribute(new ElementValue(element, getNextValue(element))));
    185                }
    186            }
    187        }
    188        return attributes;
    189    }
    190
    191    private Object getNextValue(final int t) {
    192        switch (t) {
    193        case 'B':
    194        case 'C':
    195        case 'I':
    196        case 'S':
    197        case 'Z':
    198            return caseI_KI[caseI_KI_Index++];
    199        case 'D':
    200            return caseD_KD[caseD_KD_Index++];
    201        case 'F':
    202            return caseF_KF[caseF_KF_Index++];
    203        case 'J':
    204            return caseJ_KJ[caseJ_KJ_Index++];
    205        case 'c':
    206            return casec_RS[casec_RS_Index++];
    207        case 'e':
    208            // TODO: check this - it may not work if the first string already
    209            // has a colon in it
    210            final String enumString = caseet_RS[caseet_RS_Index++] + ":" + caseec_RU[caseec_RU_Index++];
    211            return cpBands.cpNameAndTypeValue(enumString);
    212        case 's':
    213            return cases_RU[cases_RU_Index++];
    214        case '[':
    215            final int arraySize = casearray_N[casearray_N_Index++];
    216            final ElementValue[] nestedArray = new ElementValue[arraySize];
    217            for (int i = 0; i < arraySize; i++) {
    218                final int nextT = T[T_index++];
    219                nestedArray[i] = new ElementValue(nextT, getNextValue(nextT));
    220            }
    221            return nestedArray;
    222        case '@':
    223            final CPUTF8 type = nesttype_RS[nesttype_RS_Index++];
    224            final int numPairs = nestpair_N[nestpair_N_Index++];
    225
    226            return getAnnotation(type, numPairs, nestname_RU_Iterator);
    227        }
    228        return null;
    229    }
    230
    231    private Attribute getParameterAttribute(final int numParameters, final Iterator<CPUTF8> namesIterator) {
    232        final ParameterAnnotation[] parameterAnnotations = new ParameterAnnotation[numParameters];
    233        for (int i = 0; i < numParameters; i++) {
    234            final int numAnnotations = anno_N[anno_N_Index++];
    235            final int[] pairCounts = pair_N[pair_N_Index++];
    236            final Annotation[] annotations = new Annotation[numAnnotations];
    237            Arrays.setAll(annotations, j -> getAnnotation(type_RS[anno_N_Index - 1][j], pairCounts[j], namesIterator));
    238            parameterAnnotations[i] = new ParameterAnnotation(annotations);
    239        }
    240        return new RuntimeVisibleorInvisibleParameterAnnotationsAttribute(type.equals("RVPA") ? rvpaUTF8 : ripaUTF8, parameterAnnotations);
    241    }
    242
    243}