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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 org.apache.commons.compress.harmony.pack200.Codec;
import org.apache.commons.compress.harmony.pack200.Pack200Exception;
import org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry;
/**
* AttributeLayout defines a layout that describes how an attribute will be transmitted.
*/
public class AttributeLayout implements IMatcher {
public static final String ACC_ABSTRACT = "ACC_ABSTRACT"; //$NON-NLS-1$
public static final String ACC_ANNOTATION = "ACC_ANNOTATION"; //$NON-NLS-1$
public static final String ACC_ENUM = "ACC_ENUM"; //$NON-NLS-1$
public static final String ACC_FINAL = "ACC_FINAL"; //$NON-NLS-1$
public static final String ACC_INTERFACE = "ACC_INTERFACE"; //$NON-NLS-1$
public static final String ACC_NATIVE = "ACC_NATIVE"; //$NON-NLS-1$
public static final String ACC_PRIVATE = "ACC_PRIVATE"; //$NON-NLS-1$
public static final String ACC_PROTECTED = "ACC_PROTECTED"; //$NON-NLS-1$
public static final String ACC_PUBLIC = "ACC_PUBLIC"; //$NON-NLS-1$
public static final String ACC_STATIC = "ACC_STATIC"; //$NON-NLS-1$
public static final String ACC_STRICT = "ACC_STRICT"; //$NON-NLS-1$
public static final String ACC_SYNCHRONIZED = "ACC_SYNCHRONIZED"; //$NON-NLS-1$
public static final String ACC_SYNTHETIC = "ACC_SYNTHETIC"; //$NON-NLS-1$
public static final String ACC_TRANSIENT = "ACC_TRANSIENT"; //$NON-NLS-1$
public static final String ACC_VOLATILE = "ACC_VOLATILE"; //$NON-NLS-1$
public static final String ATTRIBUTE_ANNOTATION_DEFAULT = "AnnotationDefault"; //$NON-NLS-1$
public static final String ATTRIBUTE_CLASS_FILE_VERSION = "class-file version"; //$NON-NLS-1$
public static final String ATTRIBUTE_CODE = "Code"; //$NON-NLS-1$
public static final String ATTRIBUTE_CONSTANT_VALUE = "ConstantValue"; //$NON-NLS-1$
public static final String ATTRIBUTE_DEPRECATED = "Deprecated"; //$NON-NLS-1$
public static final String ATTRIBUTE_ENCLOSING_METHOD = "EnclosingMethod"; //$NON-NLS-1$
public static final String ATTRIBUTE_EXCEPTIONS = "Exceptions"; //$NON-NLS-1$
public static final String ATTRIBUTE_INNER_CLASSES = "InnerClasses"; //$NON-NLS-1$
public static final String ATTRIBUTE_LINE_NUMBER_TABLE = "LineNumberTable"; //$NON-NLS-1$
public static final String ATTRIBUTE_LOCAL_VARIABLE_TABLE = "LocalVariableTable"; //$NON-NLS-1$
public static final String ATTRIBUTE_LOCAL_VARIABLE_TYPE_TABLE = "LocalVariableTypeTable"; //$NON-NLS-1$
public static final String ATTRIBUTE_RUNTIME_INVISIBLE_ANNOTATIONS = "RuntimeInvisibleAnnotations"; //$NON-NLS-1$
public static final String ATTRIBUTE_RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS = "RuntimeInvisibleParameterAnnotations"; //$NON-NLS-1$
public static final String ATTRIBUTE_RUNTIME_VISIBLE_ANNOTATIONS = "RuntimeVisibleAnnotations"; //$NON-NLS-1$
public static final String ATTRIBUTE_RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS = "RuntimeVisibleParameterAnnotations"; //$NON-NLS-1$
public static final String ATTRIBUTE_SIGNATURE = "Signature"; //$NON-NLS-1$
public static final String ATTRIBUTE_SOURCE_FILE = "SourceFile"; //$NON-NLS-1$
public static final int CONTEXT_CLASS = 0;
public static final int CONTEXT_CODE = 3;
public static final int CONTEXT_FIELD = 1;
public static final int CONTEXT_METHOD = 2;
public static final String[] contextNames = {"Class", "Field", "Method", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
"Code",}; //$NON-NLS-1$
private static ClassFileEntry getValue(final String layout, long value, final SegmentConstantPool pool)
throws Pack200Exception {
if (layout.startsWith("R")) { //$NON-NLS-1$
// references
if (layout.indexOf('N') != -1) {
value--;
}
if (layout.startsWith("RU")) { //$NON-NLS-1$
return pool.getValue(SegmentConstantPool.UTF_8, value);
}
if (layout.startsWith("RS")) { //$NON-NLS-1$
return pool.getValue(SegmentConstantPool.SIGNATURE, value);
}
} else if (layout.startsWith("K")) { //$NON-NLS-1$
final char type = layout.charAt(1);
switch (type) {
case 'S': // String
return pool.getValue(SegmentConstantPool.CP_STRING, value);
case 'I': // Int (or byte or short)
case 'C': // Char
return pool.getValue(SegmentConstantPool.CP_INT, value);
case 'F': // Float
return pool.getValue(SegmentConstantPool.CP_FLOAT, value);
case 'J': // Long
return pool.getValue(SegmentConstantPool.CP_LONG, value);
case 'D': // Double
return pool.getValue(SegmentConstantPool.CP_DOUBLE, value);
}
}
throw new Pack200Exception("Unknown layout encoding: " + layout);
}
private final int context;
private final int index;
private final String layout;
private long mask;
private final String name;
private final boolean isDefault;
private int backwardsCallCount;
/**
* Construct a default AttributeLayout (equivalent to
* {@code new AttributeLayout(name, context, layout, index, true);})
*
* @param name TODO
* @param context TODO
* @param layout TODO
* @param index TODO
* @throws Pack200Exception Attribute context out of range.
* @throws Pack200Exception Cannot have a null layout.
* @throws Pack200Exception Cannot have an unnamed layout.
*/
public AttributeLayout(final String name, final int context, final String layout, final int index)
throws Pack200Exception {
this(name, context, layout, index, true);
}
public AttributeLayout(final String name, final int context, final String layout, final int index,
final boolean isDefault) throws Pack200Exception {
this.index = index;
this.context = context;
if (index >= 0) {
this.mask = 1L << index;
} else {
this.mask = 0;
}
if (context != CONTEXT_CLASS && context != CONTEXT_CODE && context != CONTEXT_FIELD
&& context != CONTEXT_METHOD) {
throw new Pack200Exception("Attribute context out of range: " + context);
}
if (layout == null) {
throw new Pack200Exception("Cannot have a null layout");
}
if (name == null || name.length() == 0) {
throw new Pack200Exception("Cannot have an unnamed layout");
}
this.name = name;
this.layout = layout;
this.isDefault = isDefault;
}
public Codec getCodec() {
if (layout.indexOf('O') >= 0) {
return Codec.BRANCH5;
}
if (layout.indexOf('P') >= 0) {
return Codec.BCI5;
}
if (layout.indexOf('S') >= 0 && layout.indexOf("KS") < 0 //$NON-NLS-1$
&& layout.indexOf("RS") < 0) { //$NON-NLS-1$
return Codec.SIGNED5;
}
if (layout.indexOf('B') >= 0) {
return Codec.BYTE1;
}
return Codec.UNSIGNED5;
}
public int getContext() {
return context;
}
public int getIndex() {
return index;
}
public String getLayout() {
return layout;
}
public String getName() {
return name;
}
public ClassFileEntry getValue(final long value, final SegmentConstantPool pool) throws Pack200Exception {
return getValue(layout, value, pool);
}
public ClassFileEntry getValue(final long value, final String type, final SegmentConstantPool pool)
throws Pack200Exception {
// TODO This really needs to be better tested, esp. the different types
// TODO This should have the ability to deal with RUN stuff too, and
// unions
if (!layout.startsWith("KQ")) {
return getValue(layout, value, pool);
}
if (type.equals("Ljava/lang/String;")) { //$NON-NLS-1$
return getValue("KS", value, pool);
}
return getValue("K" + type + layout.substring(2), value, //$NON-NLS-1$
pool);
}
@Override
public int hashCode() {
final int PRIME = 31;
int r = 1;
if (name != null) {
r = r * PRIME + name.hashCode();
}
if (layout != null) {
r = r * PRIME + layout.hashCode();
}
r = r * PRIME + index;
r = r * PRIME + context;
return r;
}
public boolean isDefaultLayout() {
return isDefault;
}
/*
* (non-Javadoc)
*
* @see org.apache.commons.compress.harmony.unpack200.IMatches#matches(long)
*/
@Override
public boolean matches(final long value) {
return (value & mask) != 0;
}
public int numBackwardsCallables() {
if (layout == "*") {
return 1;
}
return backwardsCallCount;
}
public void setBackwardsCallCount(final int backwardsCallCount) {
this.backwardsCallCount = backwardsCallCount;
}
@Override
public String toString() {
return contextNames[context] + ": " + name;
}
}