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	/*
	* 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. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	/*
	* This file is available under and governed by the GNU General Public
	* License version 2 only, as published by the Free Software Foundation.
	* However, the following notice accompanied the original version of this
	* file:
	*
	* ASM: a very small and fast Java bytecode manipulation framework
	* Copyright (c) 2000-2011 INRIA, France Telecom
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 3. Neither the name of the copyright holders nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
	* THE POSSIBILITY OF SUCH DAMAGE.
	*/
	package jdk.internal.org.objectweb.asm.tree.analysis;

	import jdk.internal.org.objectweb.asm.Type;

	/**
	* A {@link Value} that is represented with its type in a seven types type system. This type system
	* distinguishes the UNINITIALZED, INT, FLOAT, LONG, DOUBLE, REFERENCE and RETURNADDRESS types.
	*
	* @author Eric Bruneton
	*/
	public class BasicValue implements Value {

	/** An uninitialized value. */
	public static final BasicValue UNINITIALIZED_VALUE = new BasicValue(null);

	/** A byte, boolean, char, short, or int value. */
	public static final BasicValue INT_VALUE = new BasicValue(Type.INT_TYPE);

	/** A float value. */
	public static final BasicValue FLOAT_VALUE = new BasicValue(Type.FLOAT_TYPE);

	/** A long value. */
	public static final BasicValue LONG_VALUE = new BasicValue(Type.LONG_TYPE);

	/** A double value. */
	public static final BasicValue DOUBLE_VALUE = new BasicValue(Type.DOUBLE_TYPE);

	/** An object or array reference value. */
	public static final BasicValue REFERENCE_VALUE =
	new BasicValue(Type.getObjectType("java/lang/Object"));

	/** A return address value (produced by a jsr instruction). */
	public static final BasicValue RETURNADDRESS_VALUE = new BasicValue(Type.VOID_TYPE);

	/** The {@link Type} of this value, or {@literal null} for uninitialized values. */
	private final Type type;

	/**
	* Constructs a new {@link BasicValue} of the given type.
	*
	* @param type the value type.
	*/
	public BasicValue(final Type type) {
	this.type = type;
	}

	/**
	* Returns the {@link Type} of this value.
	*
	* @return the {@link Type} of this value.
	*/
	public Type getType() {
	return type;
	}

	@Override
	public int getSize() {
	return type == Type.LONG_TYPE \|\| type == Type.DOUBLE_TYPE ? 2 : 1;
	}

	/**
	* Returns whether this value corresponds to an object or array reference.
	*
	* @return whether this value corresponds to an object or array reference.
	*/
	public boolean isReference() {
	return type != null && (type.getSort() == Type.OBJECT \|\| type.getSort() == Type.ARRAY);
	}

	@Override
	public boolean equals(final Object value) {
	if (value == this) {
	return true;
	} else if (value instanceof BasicValue) {
	if (type == null) {
	return ((BasicValue) value).type == null;
	} else {
	return type.equals(((BasicValue) value).type);
	}
	} else {
	return false;
	}
	}

	@Override
	public int hashCode() {
	return type == null ? 0 : type.hashCode();
	}

	@Override
	public String toString() {
	if (this == UNINITIALIZED_VALUE) {
	return ".";
	} else if (this == RETURNADDRESS_VALUE) {
	return "A";
	} else if (this == REFERENCE_VALUE) {
	return "R";
	} else {
	return type.getDescriptor();
	}
	}
	}

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