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/*
* 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.bcel.classfile;
import java.io.DataInput;
import java.io.DataOutputStream;
import java.io.IOException;
import org.apache.bcel.Const;
/**
* This class represents a inner class attribute, i.e., the class
* indices of the inner and outer classes, the name and the attributes
* of the inner class.
*
* @version $Id$
* @see InnerClasses
*/
public final class InnerClass implements Cloneable, Node {
private int inner_class_index;
private int outer_class_index;
private int inner_name_index;
private int inner_access_flags;
/**
* Initialize from another object.
*/
public InnerClass(final InnerClass c) {
this(c.getInnerClassIndex(), c.getOuterClassIndex(), c.getInnerNameIndex(), c
.getInnerAccessFlags());
}
/**
* Construct object from file stream.
* @param file Input stream
* @throws IOException
*/
InnerClass(final DataInput file) throws IOException {
this(file.readUnsignedShort(), file.readUnsignedShort(), file.readUnsignedShort(), file
.readUnsignedShort());
}
/**
* @param inner_class_index Class index in constant pool of inner class
* @param outer_class_index Class index in constant pool of outer class
* @param inner_name_index Name index in constant pool of inner class
* @param inner_access_flags Access flags of inner class
*/
public InnerClass(final int inner_class_index, final int outer_class_index, final int inner_name_index,
final int inner_access_flags) {
this.inner_class_index = inner_class_index;
this.outer_class_index = outer_class_index;
this.inner_name_index = inner_name_index;
this.inner_access_flags = inner_access_flags;
}
/**
* Called by objects that are traversing the nodes of the tree implicitely
* defined by the contents of a Java class. I.e., the hierarchy of methods,
* fields, attributes, etc. spawns a tree of objects.
*
* @param v Visitor object
*/
@Override
public void accept( final Visitor v ) {
v.visitInnerClass(this);
}
/**
* Dump inner class attribute to file stream in binary format.
*
* @param file Output file stream
* @throws IOException
*/
public final void dump( final DataOutputStream file ) throws IOException {
file.writeShort(inner_class_index);
file.writeShort(outer_class_index);
file.writeShort(inner_name_index);
file.writeShort(inner_access_flags);
}
/**
* @return access flags of inner class.
*/
public final int getInnerAccessFlags() {
return inner_access_flags;
}
/**
* @return class index of inner class.
*/
public final int getInnerClassIndex() {
return inner_class_index;
}
/**
* @return name index of inner class.
*/
public final int getInnerNameIndex() {
return inner_name_index;
}
/**
* @return class index of outer class.
*/
public final int getOuterClassIndex() {
return outer_class_index;
}
/**
* @param inner_access_flags access flags for this inner class
*/
public final void setInnerAccessFlags( final int inner_access_flags ) {
this.inner_access_flags = inner_access_flags;
}
/**
* @param inner_class_index index into the constant pool for this class
*/
public final void setInnerClassIndex( final int inner_class_index ) {
this.inner_class_index = inner_class_index;
}
/**
* @param inner_name_index index into the constant pool for this class's name
*/
public final void setInnerNameIndex( final int inner_name_index ) { // TODO unused
this.inner_name_index = inner_name_index;
}
/**
* @param outer_class_index index into the constant pool for the owning class
*/
public final void setOuterClassIndex( final int outer_class_index ) { // TODO unused
this.outer_class_index = outer_class_index;
}
/**
* @return String representation.
*/
@Override
public final String toString() {
return "InnerClass(" + inner_class_index + ", " + outer_class_index + ", "
+ inner_name_index + ", " + inner_access_flags + ")";
}
/**
* @return Resolved string representation
*/
public final String toString( final ConstantPool constant_pool ) {
String outer_class_name;
String inner_name;
String inner_class_name = constant_pool.getConstantString(inner_class_index,
Const.CONSTANT_Class);
inner_class_name = Utility.compactClassName(inner_class_name);
if (outer_class_index != 0) {
outer_class_name = constant_pool.getConstantString(outer_class_index,
Const.CONSTANT_Class);
outer_class_name = " of class " + Utility.compactClassName(outer_class_name);
} else {
outer_class_name = "";
}
if (inner_name_index != 0) {
inner_name = ((ConstantUtf8) constant_pool.getConstant(inner_name_index,
Const.CONSTANT_Utf8)).getBytes();
} else {
inner_name = "(anonymous)";
}
String access = Utility.accessToString(inner_access_flags, true);
access = access.isEmpty() ? "" : (access + " ");
return " " + access + inner_name + "=class " + inner_class_name + outer_class_name;
}
/**
* @return deep copy of this object
*/
public InnerClass copy() {
try {
return (InnerClass) clone();
} catch (final CloneNotSupportedException e) {
// TODO should this throw?
}
return null;
}
}
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