/*

 * 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.DataOutputStream;

import java.io.IOException;

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

/**

 * @since 6.0

 */

public class SimpleElementValue extends ElementValue

{

    private int index;

    public SimpleElementValue(final int type, final int index, final ConstantPool cpool)

    {

        super(type, cpool);

        this.index = index;

    }

    /**

     * @return Value entry index in the cpool

     */

    public int getIndex()

    {

        return index;

    }

    public void setIndex(final int index)

    {

        this.index = index;

    }

    public String getValueString()

    {

        if (super.getType() != STRING) {

            throw new IllegalStateException(

                    "Dont call getValueString() on a non STRING ElementValue");

        }

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

                Const.CONSTANT_Utf8);

        return c.getBytes();

    }

    public int getValueInt()

    {

        if (super.getType() != PRIMITIVE_INT) {

            throw new IllegalStateException(

                    "Dont call getValueString() on a non STRING ElementValue");

        }

        final ConstantInteger c = (ConstantInteger) super.getConstantPool().getConstant(getIndex(),

                Const.CONSTANT_Integer);

        return c.getBytes();

    }

    public byte getValueByte()

    {

        if (super.getType() != PRIMITIVE_BYTE) {

            throw new IllegalStateException(

                    "Dont call getValueByte() on a non BYTE ElementValue");

        }

        final ConstantInteger c = (ConstantInteger) super.getConstantPool().getConstant(getIndex(),

                Const.CONSTANT_Integer);

        return (byte) c.getBytes();

    }

    public char getValueChar()

    {

        if (super.getType() != PRIMITIVE_CHAR) {

            throw new IllegalStateException(

                    "Dont call getValueChar() on a non CHAR ElementValue");

        }

        final ConstantInteger c = (ConstantInteger) super.getConstantPool().getConstant(getIndex(),

                Const.CONSTANT_Integer);

        return (char) c.getBytes();

    }

    public long getValueLong()

    {

        if (super.getType() != PRIMITIVE_LONG) {

            throw new IllegalStateException(

                    "Dont call getValueLong() on a non LONG ElementValue");

        }

        final ConstantLong j = (ConstantLong) super.getConstantPool().getConstant(getIndex());

        return j.getBytes();

    }

    public float getValueFloat()

    {

        if (super.getType() != PRIMITIVE_FLOAT) {

            throw new IllegalStateException(

                    "Dont call getValueFloat() on a non FLOAT ElementValue");

        }

        final ConstantFloat f = (ConstantFloat) super.getConstantPool().getConstant(getIndex());

        return f.getBytes();

    }

    public double getValueDouble()

    {

        if (super.getType() != PRIMITIVE_DOUBLE) {

            throw new IllegalStateException(

                    "Dont call getValueDouble() on a non DOUBLE ElementValue");

        }

        final ConstantDouble d = (ConstantDouble) super.getConstantPool().getConstant(getIndex());

        return d.getBytes();

    }

    public boolean getValueBoolean()

    {

        if (super.getType() != PRIMITIVE_BOOLEAN) {

            throw new IllegalStateException(

                    "Dont call getValueBoolean() on a non BOOLEAN ElementValue");

        }

        final ConstantInteger bo = (ConstantInteger) super.getConstantPool().getConstant(getIndex());

        return bo.getBytes() != 0;

    }

    public short getValueShort()

    {

        if (super.getType() != PRIMITIVE_SHORT) {

            throw new IllegalStateException(

                    "Dont call getValueShort() on a non SHORT ElementValue");

        }

        final ConstantInteger s = (ConstantInteger) super.getConstantPool().getConstant(getIndex());

        return (short) s.getBytes();

    }

    @Override

    public String toString()

    {

        return stringifyValue();

    }

    // Whatever kind of value it is, return it as a string

    @Override

    public String stringifyValue()

    {

        final ConstantPool cpool = super.getConstantPool();

        final int _type = super.getType();

        switch (_type)

        {

        case PRIMITIVE_INT:

            final ConstantInteger c = (ConstantInteger) cpool.getConstant(getIndex(),

                    Const.CONSTANT_Integer);

            return Integer.toString(c.getBytes());

        case PRIMITIVE_LONG:

            final ConstantLong j = (ConstantLong) cpool.getConstant(getIndex(),

                    Const.CONSTANT_Long);

            return Long.toString(j.getBytes());

        case PRIMITIVE_DOUBLE:

            final ConstantDouble d = (ConstantDouble) cpool.getConstant(getIndex(),

                    Const.CONSTANT_Double);

            return Double.toString(d.getBytes());

        case PRIMITIVE_FLOAT:

            final ConstantFloat f = (ConstantFloat) cpool.getConstant(getIndex(),

                    Const.CONSTANT_Float);

            return Float.toString(f.getBytes());

        case PRIMITIVE_SHORT:

            final ConstantInteger s = (ConstantInteger) cpool.getConstant(getIndex(),

                    Const.CONSTANT_Integer);

            return Integer.toString(s.getBytes());

        case PRIMITIVE_BYTE:

            final ConstantInteger b = (ConstantInteger) cpool.getConstant(getIndex(),

                    Const.CONSTANT_Integer);

            return Integer.toString(b.getBytes());

        case PRIMITIVE_CHAR:

            final ConstantInteger ch = (ConstantInteger) cpool.getConstant(

                    getIndex(), Const.CONSTANT_Integer);

            return String.valueOf((char)ch.getBytes());

        case PRIMITIVE_BOOLEAN:

            final ConstantInteger bo = (ConstantInteger) cpool.getConstant(

                    getIndex(), Const.CONSTANT_Integer);

            if (bo.getBytes() == 0) {

                return "false";

            }

            return "true";

        case STRING:

            final ConstantUtf8 cu8 = (ConstantUtf8) cpool.getConstant(getIndex(),

                    Const.CONSTANT_Utf8);

            return cu8.getBytes();

        default:

            throw new IllegalStateException("SimpleElementValue class does not know how to stringify type " + _type);

        }

    }

    @Override

    public void dump(final DataOutputStream dos) throws IOException

    {

        final int _type = super.getType();

        dos.writeByte(_type); // u1 kind of value

        switch (_type)

        {

        case PRIMITIVE_INT:

        case PRIMITIVE_BYTE:

        case PRIMITIVE_CHAR:

        case PRIMITIVE_FLOAT:

        case PRIMITIVE_LONG:

        case PRIMITIVE_BOOLEAN:

        case PRIMITIVE_SHORT:

        case PRIMITIVE_DOUBLE:

        case STRING:

            dos.writeShort(getIndex());

            break;

        default:

            throw new IllegalStateException("SimpleElementValue doesnt know how to write out type " + _type);

        }

    }

}