/*

 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/*

 * 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 com.sun.org.apache.bcel.internal.classfile;

import java.io.DataInput;

import java.io.DataOutputStream;

import java.io.IOException;

import com.sun.org.apache.bcel.internal.Const;

/**

 * This class is derived from <em>Attribute</em> and represents a reference

 * to a PMG attribute.

 *

 * @see     Attribute

 */

public final class PMGClass extends Attribute {

    private int pmg_class_index;

    private int pmg_index;

    /**

     * Initialize from another object. Note that both objects use the same

     * references (shallow copy). Use copy() for a physical copy.

     */

    public PMGClass(final PMGClass c) {

        this(c.getNameIndex(), c.getLength(), c.getPMGIndex(), c.getPMGClassIndex(), c

                .getConstantPool());

    }

    /**

     * Construct object from input stream.

     * @param name_index Index in constant pool to CONSTANT_Utf8

     * @param length Content length in bytes

     * @param input Input stream

     * @param constant_pool Array of constants

     * @throws IOException

     */

    PMGClass(final int name_index, final int length, final DataInput input, final ConstantPool constant_pool)

            throws IOException {

        this(name_index, length, input.readUnsignedShort(), input.readUnsignedShort(), constant_pool);

    }

    /**

     * @param name_index Index in constant pool to CONSTANT_Utf8

     * @param length Content length in bytes

     * @param pmg_index index in constant pool for source file name

     * @param pmg_class_index Index in constant pool to CONSTANT_Utf8

     * @param constant_pool Array of constants

     */

    public PMGClass(final int name_index, final int length, final int pmg_index, final int pmg_class_index,

            final ConstantPool constant_pool) {

        super(Const.ATTR_PMG, name_index, length, constant_pool);

        this.pmg_index = pmg_index;

        this.pmg_class_index = pmg_class_index;

    }

    /**

     * 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 ) {

        System.err.println("Visiting non-standard PMGClass object");

    }

    /**

     * Dump source file attribute to file stream in binary format.

     *

     * @param file Output file stream

     * @throws IOException

     */

    @Override

    public final void dump( final DataOutputStream file ) throws IOException {

        super.dump(file);

        file.writeShort(pmg_index);

        file.writeShort(pmg_class_index);

    }

    /**

     * @return Index in constant pool of source file name.

     */

    public final int getPMGClassIndex() {

        return pmg_class_index;

    }

    /**

     * @param pmg_class_index

     */

    public final void setPMGClassIndex( final int pmg_class_index ) {

        this.pmg_class_index = pmg_class_index;

    }

    /**

     * @return Index in constant pool of source file name.

     */

    public final int getPMGIndex() {

        return pmg_index;

    }

    /**

     * @param pmg_index

     */

    public final void setPMGIndex( final int pmg_index ) {

        this.pmg_index = pmg_index;

    }

    /**

     * @return PMG name.

     */

    public final String getPMGName() {

        final ConstantUtf8 c = (ConstantUtf8) super.getConstantPool().getConstant(pmg_index,

                Const.CONSTANT_Utf8);

        return c.getBytes();

    }

    /**

     * @return PMG class name.

     */

    public final String getPMGClassName() {

        final ConstantUtf8 c = (ConstantUtf8) super.getConstantPool().getConstant(pmg_class_index,

                Const.CONSTANT_Utf8);

        return c.getBytes();

    }

    /**

     * @return String representation

     */

    @Override

    public final String toString() {

        return "PMGClass(" + getPMGName() + ", " + getPMGClassName() + ")";

    }

    /**

     * @return deep copy of this attribute

     */

    @Override

    public Attribute copy( final ConstantPool _constant_pool ) {

        return (Attribute) clone();

    }

}