001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.camel.language.constant;
018
019 import org.apache.camel.Expression;
020 import org.apache.camel.IsSingleton;
021 import org.apache.camel.Predicate;
022 import org.apache.camel.builder.ExpressionBuilder;
023 import org.apache.camel.builder.PredicateBuilder;
024 import org.apache.camel.spi.Language;
025
026 /**
027 * A language for constant expressions.
028 */
029 public class ConstantLanguage implements Language, IsSingleton {
030
031 public static Expression constant(Object value) {
032 return ExpressionBuilder.constantExpression(value);
033 }
034
035 public Predicate createPredicate(String expression) {
036 return PredicateBuilder.toPredicate(createExpression(expression));
037 }
038
039 public Expression createExpression(String expression) {
040 return ConstantLanguage.constant(expression);
041 }
042
043 public boolean isSingleton() {
044 return true;
045 }
046 }