| /******************************************************************************* |
| * 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 org.apache.sling.scripting.sightly.java.compiler.impl.operator; |
| |
| import java.util.EnumMap; |
| import java.util.Map; |
| |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.BinaryOperator; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.UnaryOperator; |
| |
| /** |
| * Provides mappings from operators to generators |
| */ |
| public class Operators { |
| private static final Map<BinaryOperator, BinaryOpGen> representationMap = |
| new EnumMap<BinaryOperator, BinaryOpGen>(BinaryOperator.class); |
| |
| private static final Map<UnaryOperator, UnaryOpGen> unaryMapping = |
| new EnumMap<UnaryOperator, UnaryOpGen>(UnaryOperator.class); |
| |
| static { |
| representationMap.put(BinaryOperator.AND, LogicalOpGen.AND); |
| representationMap.put(BinaryOperator.OR, LogicalOpGen.OR); |
| representationMap.put(BinaryOperator.CONCATENATE, ConcatenateOpGen.INSTANCE); |
| representationMap.put(BinaryOperator.ADD, new NumericOpGen("+", BinaryOperator.ADD)); |
| representationMap.put(BinaryOperator.SUB, new NumericOpGen("-", BinaryOperator.SUB)); |
| representationMap.put(BinaryOperator.MUL, new NumericOpGen("*", BinaryOperator.MUL)); |
| representationMap.put(BinaryOperator.I_DIV, new LongOpGen("/", BinaryOperator.I_DIV)); |
| representationMap.put(BinaryOperator.REM, new LongOpGen("%", BinaryOperator.REM)); |
| representationMap.put(BinaryOperator.DIV, new NumericOpGen("/", BinaryOperator.DIV)); |
| representationMap.put(BinaryOperator.EQ, new EquivalenceOpGen(false)); |
| representationMap.put(BinaryOperator.NEQ, new EquivalenceOpGen(true)); |
| representationMap.put(BinaryOperator.LT, new ComparisonOpGen(BinaryOperator.LT)); |
| representationMap.put(BinaryOperator.LEQ, new ComparisonOpGen(BinaryOperator.LEQ)); |
| representationMap.put(BinaryOperator.GT, new ComparisonOpGen(BinaryOperator.GT)); |
| representationMap.put(BinaryOperator.GEQ, new ComparisonOpGen(BinaryOperator.GEQ)); |
| representationMap.put(BinaryOperator.STRICT_EQ, new StrictEqGenOp(false)); |
| representationMap.put(BinaryOperator.STRICT_NEQ, new StrictEqGenOp(true)); |
| representationMap.put(BinaryOperator.IN, new InOpGen()); |
| |
| unaryMapping.put(UnaryOperator.LENGTH, LengthOpGen.INSTANCE); |
| unaryMapping.put(UnaryOperator.IS_WHITESPACE, IsWhiteSpaceGen.INSTANCE); |
| unaryMapping.put(UnaryOperator.NOT, NotOpGen.INSTANCE); |
| } |
| |
| |
| /** |
| * Provide the signature of the given operator |
| * @param operator - the operator |
| * @return - the signature for the operator |
| */ |
| public static BinaryOpGen generatorFor(BinaryOperator operator) { |
| return provide(representationMap, operator); |
| } |
| |
| /** |
| * Provide the signature of the given operator |
| * @param operator - the operator |
| * @return - the signature for the operator |
| */ |
| public static UnaryOpGen generatorFor(UnaryOperator operator) { |
| return provide(unaryMapping, operator); |
| } |
| |
| private static <K, V> V provide(Map<K, V> map, K key) { |
| V v = map.get(key); |
| if (v == null) { |
| throw new UnsupportedOperationException("Cannot find generator for operator: " + key); |
| } |
| return v; |
| } |
| } |