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/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. 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. 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.
*/
package jdk.nashorn.internal.ir;
import java.util.Objects;
import jdk.nashorn.internal.parser.Token;
import jdk.nashorn.internal.parser.TokenType;
import jdk.nashorn.internal.runtime.Source;
/**
* Used to locate an entity back to it's source file.
*
*/
public class Location implements Cloneable {
/** Source of entity. */
private final Source source;
/** Token descriptor. */
private final long token;
/**
* Constructor
*
* @param source the source
* @param token token
*/
public Location(final Source source, final long token) {
this.source = source;
this.token = token;
}
/**
* Copy constructor
*
* @param location source node
*/
protected Location(final Location location) {
this.source = location.source;
this.token = location.token;
}
@Override
protected Object clone() {
try {
return super.clone();
} catch(CloneNotSupportedException e) {
throw new AssertionError(e);
}
}
@Override
public boolean equals(final Object other) {
if (other == null) {
return false;
}
if (other.getClass() != this.getClass()) {
return false;
}
final Location loc = (Location)other;
return token == loc.token && Objects.equals(source, loc.source);
}
@Override
public int hashCode() {
return Token.hashCode(token) ^ Objects.hashCode(source);
}
/**
* Return token position from a token descriptor.
*
* @return Start position of the token in the source.
*/
public int position() {
return Token.descPosition(token);
}
/**
* Return token length from a token descriptor.
*
* @return Length of the token.
*/
public int length() {
return Token.descLength(token);
}
/**
* Return token tokenType from a token descriptor.
*
* @return Type of token.
*/
public TokenType tokenType() {
return Token.descType(token);
}
/**
* Test token tokenType.
*
* @param type a type to check this token against
* @return true if token types match.
*/
public boolean isTokenType(final TokenType type) {
return Token.descType(token) == type;
}
/**
* Get the source for this location
* @return the source
*/
public Source getSource() {
return source;
}
/**
* Get the token for this location
* @return the token
*/
public long getToken() {
return token;
}
}
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