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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* Licensed 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.jetbrains.java.decompiler.struct;
import org.jetbrains.java.decompiler.code.CodeConstants;
import org.jetbrains.java.decompiler.struct.consts.ConstantPool;
import org.jetbrains.java.decompiler.struct.consts.PrimitiveConstant;
import org.jetbrains.java.decompiler.struct.lazy.LazyLoader;
import org.jetbrains.java.decompiler.util.DataInputFullStream;
import org.jetbrains.java.decompiler.util.InterpreterUtil;
import org.jetbrains.java.decompiler.util.VBStyleCollection;
import java.io.IOException;
/*
class_file {
u4 magic;
u2 minor_version;
u2 major_version;
u2 constant_pool_count;
cp_info constant_pool[constant_pool_count-1];
u2 access_flags;
u2 this_class;
u2 super_class;
u2 interfaces_count;
u2 interfaces[interfaces_count];
u2 fields_count;
field_info fields[fields_count];
u2 methods_count;
method_info methods[methods_count];
u2 attributes_count;
attribute_info attributes[attributes_count];
}
*/
public class StructClass extends StructMember {
public final String qualifiedName;
public final PrimitiveConstant superClass;
private final boolean own;
private final LazyLoader loader;
private final int minorVersion;
private final int majorVersion;
private final int[] interfaces;
private final String[] interfaceNames;
private final VBStyleCollection<StructField, String> fields;
private final VBStyleCollection<StructMethod, String> methods;
private ConstantPool pool;
public StructClass(byte[] bytes, boolean own, LazyLoader loader) throws IOException {
this(new DataInputFullStream(bytes), own, loader);
}
public StructClass(DataInputFullStream in, boolean own, LazyLoader loader) throws IOException {
this.own = own;
this.loader = loader;
in.discard(4);
minorVersion = in.readUnsignedShort();
majorVersion = in.readUnsignedShort();
pool = new ConstantPool(in);
accessFlags = in.readUnsignedShort();
int thisClassIdx = in.readUnsignedShort();
int superClassIdx = in.readUnsignedShort();
qualifiedName = pool.getPrimitiveConstant(thisClassIdx).getString();
superClass = pool.getPrimitiveConstant(superClassIdx);
// interfaces
int length = in.readUnsignedShort();
interfaces = new int[length];
interfaceNames = new String[length];
for (int i = 0; i < length; i++) {
interfaces[i] = in.readUnsignedShort();
interfaceNames[i] = pool.getPrimitiveConstant(interfaces[i]).getString();
}
// fields
length = in.readUnsignedShort();
fields = new VBStyleCollection<StructField, String>();
for (int i = 0; i < length; i++) {
StructField field = new StructField(in, this);
fields.addWithKey(field, InterpreterUtil.makeUniqueKey(field.getName(), field.getDescriptor()));
}
// methods
length = in.readUnsignedShort();
methods = new VBStyleCollection<StructMethod, String>();
for (int i = 0; i < length; i++) {
StructMethod method = new StructMethod(in, this);
methods.addWithKey(method, InterpreterUtil.makeUniqueKey(method.getName(), method.getDescriptor()));
}
// attributes
attributes = readAttributes(in, pool);
releaseResources();
}
public boolean hasField(String name, String descriptor) {
return getField(name, descriptor) != null;
}
public StructField getField(String name, String descriptor) {
return fields.getWithKey(InterpreterUtil.makeUniqueKey(name, descriptor));
}
public StructMethod getMethod(String key) {
return methods.getWithKey(key);
}
public StructMethod getMethod(String name, String descriptor) {
return methods.getWithKey(InterpreterUtil.makeUniqueKey(name, descriptor));
}
public String getInterface(int i) {
return interfaceNames[i];
}
public void releaseResources() {
if (loader != null) {
pool = null;
}
}
public ConstantPool getPool() {
if (pool == null && loader != null) {
pool = loader.loadPool(qualifiedName);
}
return pool;
}
public int[] getInterfaces() {
return interfaces;
}
public String[] getInterfaceNames() {
return interfaceNames;
}
public VBStyleCollection<StructMethod, String> getMethods() {
return methods;
}
public VBStyleCollection<StructField, String> getFields() {
return fields;
}
public boolean isOwn() {
return own;
}
public LazyLoader getLoader() {
return loader;
}
public boolean isVersionGE_1_5() {
return (majorVersion > 48 || (majorVersion == 48 && minorVersion > 0)); // FIXME: check second condition
}
public boolean isVersionGE_1_7() {
return (majorVersion >= 51);
}
public int getBytecodeVersion() {
switch (majorVersion) {
case 52:
return CodeConstants.BYTECODE_JAVA_8;
case 51:
return CodeConstants.BYTECODE_JAVA_7;
case 50:
return CodeConstants.BYTECODE_JAVA_6;
case 49:
return CodeConstants.BYTECODE_JAVA_5;
}
return CodeConstants.BYTECODE_JAVA_LE_4;
}
}
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