/*
* PrefixOperatorMap.java
*
* Copyright (c) 2008 David Holroyd
*
* Licensed 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 uk.co.badgersinfoil.metaas.impl;
import java.util.HashMap;
import java.util.Map;
import org.antlr.runtime.Token;
import org.asdt.core.internal.antlr.AS3Parser;
import uk.co.badgersinfoil.metaas.dom.ASPrefixExpression;
import uk.co.badgersinfoil.metaas.impl.antlr.LinkedListToken;
public class PrefixOperatorMap {
private static final Map OPERATORS_BY_TYPE = new HashMap();
private static final Map TYPES_BY_OPERATOR = new HashMap();
private static void mapOp(int type, String text, ASPrefixExpression.Op operator) {
OPERATORS_BY_TYPE.put(new Integer(type), operator);
TYPES_BY_OPERATOR.put(operator, new LinkedListToken(type, text));
}
static {
mapOp(AS3Parser.UNARY_MINUS, "-", ASPrefixExpression.Op.NEG);
mapOp(AS3Parser.LNOT, "!", ASPrefixExpression.Op.NOT);
mapOp(AS3Parser.UNARY_PLUS, "+", ASPrefixExpression.Op.POS);
mapOp(AS3Parser.PRE_DEC, "--", ASPrefixExpression.Op.PREDEC);
mapOp(AS3Parser.PRE_INC, "++", ASPrefixExpression.Op.PREINC);
}
public static ASPrefixExpression.Op opFromType(int type) {
ASPrefixExpression.Op op = (ASPrefixExpression.Op)OPERATORS_BY_TYPE.get(new Integer(type));
if (op == null) {
throw new IllegalArgumentException("No operator for token-type "+ASTUtils.tokenName(type));
}
return op;
}
public static void initialiseFromOp(ASPrefixExpression.Op operator, Token tok) {
LinkedListToken type = (LinkedListToken)TYPES_BY_OPERATOR.get(operator);
if (type == null) {
throw new IllegalArgumentException("No operator for Op "+operator);
}
tok.setType(type.getType());
tok.setText(type.getText());
}
}