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Apache Commons Compress software defines an API for working with
compression and archive formats. These include: bzip2, gzip, pack200,
lzma, xz, Snappy, traditional Unix Compress, DEFLATE, DEFLATE64, LZ4,
Brotli, Zstandard and ar, cpio, jar, tar, zip, dump, 7z, arj.
/*
* 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 org.apache.commons.compress.harmony.unpack200;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.compress.harmony.pack200.Codec;
import org.apache.commons.compress.harmony.pack200.Pack200Exception;
import org.apache.commons.compress.harmony.unpack200.bytecode.CPClass;
import org.apache.commons.compress.harmony.unpack200.bytecode.CPDouble;
import org.apache.commons.compress.harmony.unpack200.bytecode.CPFieldRef;
import org.apache.commons.compress.harmony.unpack200.bytecode.CPFloat;
import org.apache.commons.compress.harmony.unpack200.bytecode.CPInteger;
import org.apache.commons.compress.harmony.unpack200.bytecode.CPInterfaceMethodRef;
import org.apache.commons.compress.harmony.unpack200.bytecode.CPLong;
import org.apache.commons.compress.harmony.unpack200.bytecode.CPMethodRef;
import org.apache.commons.compress.harmony.unpack200.bytecode.CPNameAndType;
import org.apache.commons.compress.harmony.unpack200.bytecode.CPString;
import org.apache.commons.compress.harmony.unpack200.bytecode.CPUTF8;
/**
* Constant Pool bands
*/
public class CpBands extends BandSet {
private final SegmentConstantPool pool = new SegmentConstantPool(this);
private String[] cpClass;
private int[] cpClassInts;
private int[] cpDescriptorNameInts;
private int[] cpDescriptorTypeInts;
private String[] cpDescriptor;
private double[] cpDouble;
private String[] cpFieldClass;
private String[] cpFieldDescriptor;
private int[] cpFieldClassInts;
private int[] cpFieldDescriptorInts;
private float[] cpFloat;
private String[] cpIMethodClass;
private String[] cpIMethodDescriptor;
private int[] cpIMethodClassInts;
private int[] cpIMethodDescriptorInts;
private int[] cpInt;
private long[] cpLong;
private String[] cpMethodClass;
private String[] cpMethodDescriptor;
private int[] cpMethodClassInts;
private int[] cpMethodDescriptorInts;
private String[] cpSignature;
private int[] cpSignatureInts;
private String[] cpString;
private int[] cpStringInts;
private String[] cpUTF8;
private final Map stringsToCPUTF8 = new HashMap<>();
private final Map stringsToCPStrings = new HashMap<>();
private final Map longsToCPLongs = new HashMap<>();
private final Map integersToCPIntegers = new HashMap<>();
private final Map floatsToCPFloats = new HashMap<>();
private final Map stringsToCPClass = new HashMap<>();
private final Map doublesToCPDoubles = new HashMap<>();
private final Map descriptorsToCPNameAndTypes = new HashMap<>();
private Map mapClass;
private Map mapDescriptor;
private Map mapUTF8;
// TODO: Not used
private Map mapSignature;
private int intOffset;
private int floatOffset;
private int longOffset;
private int doubleOffset;
private int stringOffset;
private int classOffset;
private int signatureOffset;
private int descrOffset;
private int fieldOffset;
private int methodOffset;
private int imethodOffset;
public CpBands(final Segment segment) {
super(segment);
}
public CPClass cpClassValue(final int index) {
final String string = cpClass[index];
final int utf8Index = cpClassInts[index];
final int globalIndex = classOffset + index;
return stringsToCPClass.computeIfAbsent(string, k -> new CPClass(cpUTF8Value(utf8Index), globalIndex));
}
public CPClass cpClassValue(final String string) {
CPClass cpString = stringsToCPClass.get(string);
if (cpString == null) {
final Integer index = mapClass.get(string);
if (index != null) {
return cpClassValue(index.intValue());
}
cpString = new CPClass(cpUTF8Value(string, false), -1);
stringsToCPClass.put(string, cpString);
}
return cpString;
}
public CPDouble cpDoubleValue(final int index) {
final Double dbl = Double.valueOf(cpDouble[index]);
CPDouble cpDouble = doublesToCPDoubles.get(dbl);
if (cpDouble == null) {
cpDouble = new CPDouble(dbl, index + doubleOffset);
doublesToCPDoubles.put(dbl, cpDouble);
}
return cpDouble;
}
public CPFieldRef cpFieldValue(final int index) {
return new CPFieldRef(cpClassValue(cpFieldClassInts[index]), cpNameAndTypeValue(cpFieldDescriptorInts[index]),
index + fieldOffset);
}
public CPFloat cpFloatValue(final int index) {
final Float f = Float.valueOf(cpFloat[index]);
CPFloat cpFloat = floatsToCPFloats.get(f);
if (cpFloat == null) {
cpFloat = new CPFloat(f, index + floatOffset);
floatsToCPFloats.put(f, cpFloat);
}
return cpFloat;
}
public CPInterfaceMethodRef cpIMethodValue(final int index) {
return new CPInterfaceMethodRef(cpClassValue(cpIMethodClassInts[index]),
cpNameAndTypeValue(cpIMethodDescriptorInts[index]), index + imethodOffset);
}
public CPInteger cpIntegerValue(final int index) {
final Integer i = Integer.valueOf(cpInt[index]);
CPInteger cpInteger = integersToCPIntegers.get(i);
if (cpInteger == null) {
cpInteger = new CPInteger(i, index + intOffset);
integersToCPIntegers.put(i, cpInteger);
}
return cpInteger;
}
public CPLong cpLongValue(final int index) {
final Long l = Long.valueOf(cpLong[index]);
CPLong cpLong = longsToCPLongs.get(l);
if (cpLong == null) {
cpLong = new CPLong(l, index + longOffset);
longsToCPLongs.put(l, cpLong);
}
return cpLong;
}
public CPMethodRef cpMethodValue(final int index) {
return new CPMethodRef(cpClassValue(cpMethodClassInts[index]),
cpNameAndTypeValue(cpMethodDescriptorInts[index]), index + methodOffset);
}
public CPNameAndType cpNameAndTypeValue(final int index) {
final String descriptor = cpDescriptor[index];
CPNameAndType cpNameAndType = descriptorsToCPNameAndTypes.get(descriptor);
if (cpNameAndType == null) {
final int nameIndex = cpDescriptorNameInts[index];
final int descriptorIndex = cpDescriptorTypeInts[index];
final CPUTF8 name = cpUTF8Value(nameIndex);
final CPUTF8 descriptorU = cpSignatureValue(descriptorIndex);
cpNameAndType = new CPNameAndType(name, descriptorU, index + descrOffset);
descriptorsToCPNameAndTypes.put(descriptor, cpNameAndType);
}
return cpNameAndType;
}
public CPNameAndType cpNameAndTypeValue(final String descriptor) {
CPNameAndType cpNameAndType = descriptorsToCPNameAndTypes.get(descriptor);
if (cpNameAndType == null) {
final Integer index = mapDescriptor.get(descriptor);
if (index != null) {
return cpNameAndTypeValue(index.intValue());
}
final int colon = descriptor.indexOf(':');
final String nameString = descriptor.substring(0, colon);
final String descriptorString = descriptor.substring(colon + 1);
final CPUTF8 name = cpUTF8Value(nameString, true);
final CPUTF8 descriptorU = cpUTF8Value(descriptorString, true);
cpNameAndType = new CPNameAndType(name, descriptorU, -1 + descrOffset);
descriptorsToCPNameAndTypes.put(descriptor, cpNameAndType);
}
return cpNameAndType;
}
public CPUTF8 cpSignatureValue(final int index) {
int globalIndex;
if (cpSignatureInts[index] != -1) {
globalIndex = cpSignatureInts[index];
} else {
globalIndex = index + signatureOffset;
}
final String string = cpSignature[index];
CPUTF8 cpUTF8 = stringsToCPUTF8.get(string);
if (cpUTF8 == null) {
cpUTF8 = new CPUTF8(string, globalIndex);
stringsToCPUTF8.put(string, cpUTF8);
}
return cpUTF8;
}
public CPString cpStringValue(final int index) {
final String string = cpString[index];
final int utf8Index = cpStringInts[index];
final int globalIndex = stringOffset + index;
CPString cpString = stringsToCPStrings.get(string);
if (cpString == null) {
cpString = new CPString(cpUTF8Value(utf8Index), globalIndex);
stringsToCPStrings.put(string, cpString);
}
return cpString;
}
public CPUTF8 cpUTF8Value(final int index) {
final String string = cpUTF8[index];
CPUTF8 cputf8 = stringsToCPUTF8.get(string);
if (cputf8 == null) {
cputf8 = new CPUTF8(string, index);
stringsToCPUTF8.put(string, cputf8);
} else if (cputf8.getGlobalIndex() > index) {
cputf8.setGlobalIndex(index);
}
return cputf8;
}
public CPUTF8 cpUTF8Value(final String string) {
return cpUTF8Value(string, true);
}
public CPUTF8 cpUTF8Value(final String string, final boolean searchForIndex) {
CPUTF8 cputf8 = stringsToCPUTF8.get(string);
if (cputf8 == null) {
Integer index = null;
if (searchForIndex) {
index = mapUTF8.get(string);
}
if (index != null) {
return cpUTF8Value(index.intValue());
}
if (searchForIndex) {
index = mapSignature.get(string);
}
if (index != null) {
return cpSignatureValue(index.intValue());
}
cputf8 = new CPUTF8(string, -1);
stringsToCPUTF8.put(string, cputf8);
}
return cputf8;
}
public SegmentConstantPool getConstantPool() {
return pool;
}
public String[] getCpClass() {
return cpClass;
}
public String[] getCpDescriptor() {
return cpDescriptor;
}
public int[] getCpDescriptorNameInts() {
return cpDescriptorNameInts;
}
public int[] getCpDescriptorTypeInts() {
return cpDescriptorTypeInts;
}
public String[] getCpFieldClass() {
return cpFieldClass;
}
public String[] getCpIMethodClass() {
return cpIMethodClass;
}
public int[] getCpInt() {
return cpInt;
}
public long[] getCpLong() {
return cpLong;
}
public String[] getCpMethodClass() {
return cpMethodClass;
}
public String[] getCpMethodDescriptor() {
return cpMethodDescriptor;
}
public String[] getCpSignature() {
return cpSignature;
}
public String[] getCpUTF8() {
return cpUTF8;
}
/**
* Parses the constant pool class names, using {@link #cpClassCount} to populate {@link #cpClass} from
* {@link #cpUTF8}.
*
* @param in the input stream to read from
* @throws IOException if a problem occurs during reading from the underlying stream
* @throws Pack200Exception if a problem occurs with an unexpected value or unsupported codec
*/
private void parseCpClass(final InputStream in) throws IOException, Pack200Exception {
final int cpClassCount = header.getCpClassCount();
cpClassInts = decodeBandInt("cp_Class", in, Codec.UDELTA5, cpClassCount);
cpClass = new String[cpClassCount];
mapClass = new HashMap<>(cpClassCount);
for (int i = 0; i < cpClassCount; i++) {
cpClass[i] = cpUTF8[cpClassInts[i]];
mapClass.put(cpClass[i], Integer.valueOf(i));
}
}
/**
* Parses the constant pool descriptor definitions, using {@link #cpDescriptorCount} to populate
* {@link #cpDescriptor}. For ease of use, the cpDescriptor is stored as a string of the form name:type,
* largely to make it easier for representing field and method descriptors (e.g.
* {@code out:java.lang.PrintStream}) in a way that is compatible with passing String arrays.
*
* @param in the input stream to read from
* @throws IOException if a problem occurs during reading from the underlying stream
* @throws Pack200Exception if a problem occurs with an unexpected value or unsupported codec
*/
private void parseCpDescriptor(final InputStream in) throws IOException, Pack200Exception {
final int cpDescriptorCount = header.getCpDescriptorCount();
cpDescriptorNameInts = decodeBandInt("cp_Descr_name", in, Codec.DELTA5, cpDescriptorCount);
cpDescriptorTypeInts = decodeBandInt("cp_Descr_type", in, Codec.UDELTA5, cpDescriptorCount);
final String[] cpDescriptorNames = getReferences(cpDescriptorNameInts, cpUTF8);
final String[] cpDescriptorTypes = getReferences(cpDescriptorTypeInts, cpSignature);
cpDescriptor = new String[cpDescriptorCount];
mapDescriptor = new HashMap<>(cpDescriptorCount);
for (int i = 0; i < cpDescriptorCount; i++) {
cpDescriptor[i] = cpDescriptorNames[i] + ":" + cpDescriptorTypes[i]; //$NON-NLS-1$
mapDescriptor.put(cpDescriptor[i], Integer.valueOf(i));
}
}
private void parseCpDouble(final InputStream in) throws IOException, Pack200Exception {
final int cpDoubleCount = header.getCpDoubleCount();
final long[] band = parseFlags("cp_Double", in, cpDoubleCount, Codec.UDELTA5, Codec.DELTA5);
cpDouble = new double[band.length];
Arrays.setAll(cpDouble, i -> Double.longBitsToDouble(band[i]));
}
/**
* Parses the constant pool field definitions, using {@link #cpFieldCount} to populate {@link #cpFieldClass} and
* {@link #cpFieldDescriptor}.
*
* @param in the input stream to read from
* @throws IOException if a problem occurs during reading from the underlying stream
* @throws Pack200Exception if a problem occurs with an unexpected value or unsupported codec
*/
private void parseCpField(final InputStream in) throws IOException, Pack200Exception {
final int cpFieldCount = header.getCpFieldCount();
cpFieldClassInts = decodeBandInt("cp_Field_class", in, Codec.DELTA5, cpFieldCount);
cpFieldDescriptorInts = decodeBandInt("cp_Field_desc", in, Codec.UDELTA5, cpFieldCount);
cpFieldClass = new String[cpFieldCount];
cpFieldDescriptor = new String[cpFieldCount];
for (int i = 0; i < cpFieldCount; i++) {
cpFieldClass[i] = cpClass[cpFieldClassInts[i]];
cpFieldDescriptor[i] = cpDescriptor[cpFieldDescriptorInts[i]];
}
}
private void parseCpFloat(final InputStream in) throws IOException, Pack200Exception {
final int cpFloatCount = header.getCpFloatCount();
cpFloat = new float[cpFloatCount];
final int[] floatBits = decodeBandInt("cp_Float", in, Codec.UDELTA5, cpFloatCount);
for (int i = 0; i < cpFloatCount; i++) {
cpFloat[i] = Float.intBitsToFloat(floatBits[i]);
}
}
/**
* Parses the constant pool interface method definitions, using {@link #cpIMethodCount} to populate
* {@link #cpIMethodClass} and {@link #cpIMethodDescriptor}.
*
* @param in the input stream to read from
* @throws IOException if a problem occurs during reading from the underlying stream
* @throws Pack200Exception if a problem occurs with an unexpected value or unsupported codec
*/
private void parseCpIMethod(final InputStream in) throws IOException, Pack200Exception {
final int cpIMethodCount = header.getCpIMethodCount();
cpIMethodClassInts = decodeBandInt("cp_Imethod_class", in, Codec.DELTA5, cpIMethodCount);
cpIMethodDescriptorInts = decodeBandInt("cp_Imethod_desc", in, Codec.UDELTA5, cpIMethodCount);
cpIMethodClass = new String[cpIMethodCount];
cpIMethodDescriptor = new String[cpIMethodCount];
for (int i = 0; i < cpIMethodCount; i++) {
cpIMethodClass[i] = cpClass[cpIMethodClassInts[i]];
cpIMethodDescriptor[i] = cpDescriptor[cpIMethodDescriptorInts[i]];
}
}
private void parseCpInt(final InputStream in) throws IOException, Pack200Exception {
final int cpIntCount = header.getCpIntCount();
cpInt = decodeBandInt("cpInt", in, Codec.UDELTA5, cpIntCount);
}
private void parseCpLong(final InputStream in) throws IOException, Pack200Exception {
final int cpLongCount = header.getCpLongCount();
cpLong = parseFlags("cp_Long", in, cpLongCount, Codec.UDELTA5, Codec.DELTA5);
}
/**
* Parses the constant pool method definitions, using {@link #cpMethodCount} to populate {@link #cpMethodClass} and
* {@link #cpMethodDescriptor}.
*
* @param in the input stream to read from
* @throws IOException if a problem occurs during reading from the underlying stream
* @throws Pack200Exception if a problem occurs with an unexpected value or unsupported codec
*/
private void parseCpMethod(final InputStream in) throws IOException, Pack200Exception {
final int cpMethodCount = header.getCpMethodCount();
cpMethodClassInts = decodeBandInt("cp_Method_class", in, Codec.DELTA5, cpMethodCount);
cpMethodDescriptorInts = decodeBandInt("cp_Method_desc", in, Codec.UDELTA5, cpMethodCount);
cpMethodClass = new String[cpMethodCount];
cpMethodDescriptor = new String[cpMethodCount];
for (int i = 0; i < cpMethodCount; i++) {
cpMethodClass[i] = cpClass[cpMethodClassInts[i]];
cpMethodDescriptor[i] = cpDescriptor[cpMethodDescriptorInts[i]];
}
}
/**
* Parses the constant pool signature classes, using {@link #cpSignatureCount} to populate {@link #cpSignature}. A
* signature form is akin to the bytecode representation of a class; Z for boolean, I for int, [ for array etc.
* However, although classes are started with L, the classname does not follow the form; instead, there is a
* separate array of classes. So an array corresponding to {@code public static void main(String args[])} has a
* form of {@code [L(V)} and a classes array of {@code [java.lang.String]}. The {@link #cpSignature} is a
* string representation identical to the bytecode equivalent {@code [Ljava/lang/String;(V)} TODO Check that
* the form is as above and update other types e.g. J
*
* @param in the input stream to read from
* @throws IOException if a problem occurs during reading from the underlying stream
* @throws Pack200Exception if a problem occurs with an unexpected value or unsupported codec
*/
private void parseCpSignature(final InputStream in) throws IOException, Pack200Exception {
final int cpSignatureCount = header.getCpSignatureCount();
cpSignatureInts = decodeBandInt("cp_Signature_form", in, Codec.DELTA5, cpSignatureCount);
final String[] cpSignatureForm = getReferences(cpSignatureInts, cpUTF8);
cpSignature = new String[cpSignatureCount];
mapSignature = new HashMap<>();
int lCount = 0;
for (int i = 0; i < cpSignatureCount; i++) {
final String form = cpSignatureForm[i];
final char[] chars = form.toCharArray();
for (final char element : chars) {
if (element == 'L') {
cpSignatureInts[i] = -1;
lCount++;
}
}
}
final String[] cpSignatureClasses = parseReferences("cp_Signature_classes", in, Codec.UDELTA5, lCount, cpClass);
int index = 0;
for (int i = 0; i < cpSignatureCount; i++) {
final String form = cpSignatureForm[i];
final int len = form.length();
final StringBuilder signature = new StringBuilder(64);
final ArrayList list = new ArrayList<>();
for (int j = 0; j < len; j++) {
final char c = form.charAt(j);
signature.append(c);
if (c == 'L') {
final String className = cpSignatureClasses[index];
list.add(className);
signature.append(className);
index++;
}
}
cpSignature[i] = signature.toString();
mapSignature.put(signature.toString(), Integer.valueOf(i));
}
// for (int i = 0; i < cpSignatureInts.length; i++) {
// if (cpSignatureInts[i] == -1) {
// cpSignatureInts[i] = search(cpUTF8, cpSignature[i]);
// }
// }
}
/**
* Parses the constant pool strings, using {@link #cpStringCount} to populate {@link #cpString} from indexes into
* {@link #cpUTF8}.
*
* @param in the input stream to read from
* @throws IOException if a problem occurs during reading from the underlying stream
* @throws Pack200Exception if a problem occurs with an unexpected value or unsupported codec
*/
private void parseCpString(final InputStream in) throws IOException, Pack200Exception {
final int cpStringCount = header.getCpStringCount();
cpStringInts = decodeBandInt("cp_String", in, Codec.UDELTA5, cpStringCount);
cpString = new String[cpStringCount];
Arrays.setAll(cpString, i -> cpUTF8[cpStringInts[i]]);
}
private void parseCpUtf8(final InputStream in) throws IOException, Pack200Exception {
final int cpUTF8Count = header.getCpUTF8Count();
cpUTF8 = new String[cpUTF8Count];
mapUTF8 = new HashMap<>(cpUTF8Count + 1);
cpUTF8[0] = ""; //$NON-NLS-1$
mapUTF8.put("", Integer.valueOf(0));
final int[] prefix = decodeBandInt("cpUTF8Prefix", in, Codec.DELTA5, cpUTF8Count - 2);
int charCount = 0;
int bigSuffixCount = 0;
final int[] suffix = decodeBandInt("cpUTF8Suffix", in, Codec.UNSIGNED5, cpUTF8Count - 1);
for (final int element : suffix) {
if (element == 0) {
bigSuffixCount++;
} else {
charCount += element;
}
}
final char[] data = new char[charCount];
final int[] dataBand = decodeBandInt("cp_Utf8_chars", in, Codec.CHAR3, charCount);
for (int i = 0; i < data.length; i++) {
data[i] = (char) dataBand[i];
}
// Read in the big suffix data
final int[] bigSuffixCounts = decodeBandInt("cp_Utf8_big_suffix", in, Codec.DELTA5, bigSuffixCount);
final int[][] bigSuffixDataBand = new int[bigSuffixCount][];
for (int i = 0; i < bigSuffixDataBand.length; i++) {
bigSuffixDataBand[i] = decodeBandInt("cp_Utf8_big_chars " + i, in, Codec.DELTA5, bigSuffixCounts[i]);
}
// Convert big suffix data to characters
final char[][] bigSuffixData = new char[bigSuffixCount][];
for (int i = 0; i < bigSuffixDataBand.length; i++) {
bigSuffixData[i] = new char[bigSuffixDataBand[i].length];
for (int j = 0; j < bigSuffixDataBand[i].length; j++) {
bigSuffixData[i][j] = (char) bigSuffixDataBand[i][j];
}
}
// Go through the strings
charCount = 0;
bigSuffixCount = 0;
for (int i = 1; i < cpUTF8Count; i++) {
final String lastString = cpUTF8[i - 1];
if (suffix[i - 1] == 0) {
// The big suffix stuff hasn't been tested, and I'll be
// surprised if it works first time w/o errors ...
cpUTF8[i] = lastString.substring(0, i > 1 ? prefix[i - 2] : 0)
+ new String(bigSuffixData[bigSuffixCount++]);
mapUTF8.put(cpUTF8[i], Integer.valueOf(i));
} else {
cpUTF8[i] = lastString.substring(0, i > 1 ? prefix[i - 2] : 0)
+ new String(data, charCount, suffix[i - 1]);
charCount += suffix[i - 1];
mapUTF8.put(cpUTF8[i], Integer.valueOf(i));
}
}
}
@Override
public void read(final InputStream in) throws IOException, Pack200Exception {
parseCpUtf8(in);
parseCpInt(in);
parseCpFloat(in);
parseCpLong(in);
parseCpDouble(in);
parseCpString(in);
parseCpClass(in);
parseCpSignature(in);
parseCpDescriptor(in);
parseCpField(in);
parseCpMethod(in);
parseCpIMethod(in);
intOffset = cpUTF8.length;
floatOffset = intOffset + cpInt.length;
longOffset = floatOffset + cpFloat.length;
doubleOffset = longOffset + cpLong.length;
stringOffset = doubleOffset + cpDouble.length;
classOffset = stringOffset + cpString.length;
signatureOffset = classOffset + cpClass.length;
descrOffset = signatureOffset + cpSignature.length;
fieldOffset = descrOffset + cpDescriptor.length;
methodOffset = fieldOffset + cpFieldClass.length;
imethodOffset = methodOffset + cpMethodClass.length;
}
@Override
public void unpack() {
}
}