/*

 * Copyright 1998-2006 Sun Microsystems, Inc.  All Rights Reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package com.sun.tools.jdi;

import com.sun.jdi.*;

public abstract class PrimitiveValueImpl extends ValueImpl

                                         implements PrimitiveValue {

    PrimitiveValueImpl(VirtualMachine aVm) {

        super(aVm);

    }

    abstract public boolean booleanValue();

    abstract public byte byteValue();

    abstract public char charValue();

    abstract public short shortValue();

    abstract public int intValue();

    abstract public long longValue();

    abstract public float floatValue();

    abstract public double doubleValue();

    /*

     * The checked versions of the value accessors throw

     * InvalidTypeException if the required conversion is

     * narrowing and would result in the loss of information

     * (either magnitude or precision).

     *

     * Default implementations here do no checking; subclasses

     * override as necessary to do the proper checking.

     */

    byte checkedByteValue() throws InvalidTypeException {

        return byteValue();

    }

    char checkedCharValue() throws InvalidTypeException {

        return charValue();

    }

    short checkedShortValue() throws InvalidTypeException {

        return shortValue();

    }

    int checkedIntValue() throws InvalidTypeException {

        return intValue();

    }

    long checkedLongValue() throws InvalidTypeException {

        return longValue();

    }

    float checkedFloatValue() throws InvalidTypeException {

        return floatValue();

    }

    final boolean checkedBooleanValue() throws InvalidTypeException {

        /*

         * Always disallow a conversion to boolean from any other

         * primitive

         */

        if (this instanceof BooleanValue) {

            return booleanValue();

        } else {

            throw new InvalidTypeException("Can't convert non-boolean value to boolean");

        }

    }

    final double checkedDoubleValue() throws InvalidTypeException {

        /*

         * Can't overflow by converting to double, so this method

         * is never overridden

         */

        return doubleValue();

    }

    ValueImpl prepareForAssignmentTo(ValueContainer destination)

                    throws InvalidTypeException {

        return convertForAssignmentTo(destination);

    }

    ValueImpl convertForAssignmentTo(ValueContainer destination)

                 throws InvalidTypeException {

        /*

         * TO DO: Centralize JNI signature knowledge

         */

        if (destination.signature().length() > 1) {

            throw new InvalidTypeException("Can't assign primitive value to object");

        }

        if ((destination.signature().charAt(0) == 'Z') &&

            (type().signature().charAt(0) != 'Z')) {

            throw new InvalidTypeException("Can't assign non-boolean value to a boolean");

        }

        if ((destination.signature().charAt(0) != 'Z') &&

            (type().signature().charAt(0) == 'Z')) {

            throw new InvalidTypeException("Can't assign boolean value to an non-boolean");

        }

        if ("void".equals(destination.typeName())) {

            throw new InvalidTypeException("Can't assign primitive value to a void");

        }

        try {

            PrimitiveTypeImpl primitiveType = (PrimitiveTypeImpl)destination.type();

            return (ValueImpl)(primitiveType.convert(this));

        } catch (ClassNotLoadedException e) {

            throw new InternalException("Signature and type inconsistent for: " +

                                        destination.typeName());

        }

    }

}