/*

 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

 */

/*

 * 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.generic;

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

import com.sun.org.apache.bcel.internal.util.ByteSequence;

import java.io.DataOutputStream;

import java.io.IOException;

/**

 * NEWARRAY -  Create new array of basic type (int, short, ...)

 * <PRE>Stack: ..., count -&gt; ..., arrayref</PRE>

 * type must be one of T_INT, T_SHORT, ...

 *

 * @version $Id: NEWARRAY.java 1747278 2016-06-07 17:28:43Z britter $

 * @LastModified: Oct 2017

 */

public class NEWARRAY extends Instruction implements AllocationInstruction, ExceptionThrower,

        StackProducer {

    private byte type;

    /**

     * Empty constructor needed for the Class.newInstance() statement in

     * Instruction.readInstruction(). Not to be used otherwise.

     */

    NEWARRAY() {

    }

    public NEWARRAY(final byte type) {

        super(com.sun.org.apache.bcel.internal.Const.NEWARRAY, (short) 2);

        this.type = type;

    }

    public NEWARRAY(final BasicType type) {

        this(type.getType());

    }

    /**

     * Dump instruction as byte code to stream out.

     * @param out Output stream

     */

    @Override

    public void dump( final DataOutputStream out ) throws IOException {

        out.writeByte(super.getOpcode());

        out.writeByte(type);

    }

    /**

     * @return numeric code for basic element type

     */

    public final byte getTypecode() {

        return type;

    }

    /**

     * @return type of constructed array

     */

    public final Type getType() {

        return new ArrayType(BasicType.getType(type), 1);

    }

    /**

     * @return mnemonic for instruction

     */

    @Override

    public String toString( final boolean verbose ) {

        return super.toString(verbose) + " " + com.sun.org.apache.bcel.internal.Const.getTypeName(type);

    }

    /**

     * Read needed data (e.g. index) from file.

     */

    @Override

    protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException {

        type = bytes.readByte();

        super.setLength(2);

    }

    @Override

    public Class<?>[] getExceptions() {

        return new Class<?>[] {

            ExceptionConst.NEGATIVE_ARRAY_SIZE_EXCEPTION

        };

    }

    /**

     * Call corresponding visitor method(s). The order is:

     * Call visitor methods of implemented interfaces first, then

     * call methods according to the class hierarchy in descending order,

     * i.e., the most specific visitXXX() call comes last.

     *

     * @param v Visitor object

     */

    @Override

    public void accept( final Visitor v ) {

        v.visitAllocationInstruction(this);

        v.visitExceptionThrower(this);

        v.visitStackProducer(this);

        v.visitNEWARRAY(this);

    }

}