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 */
017package org.apache.camel.model.language;
018
019import javax.xml.bind.annotation.XmlAccessType;
020import javax.xml.bind.annotation.XmlAccessorType;
021import javax.xml.bind.annotation.XmlAttribute;
022import javax.xml.bind.annotation.XmlRootElement;
023import javax.xml.bind.annotation.XmlTransient;
024
025import org.apache.camel.CamelContext;
026import org.apache.camel.Expression;
027import org.apache.camel.Predicate;
028import org.apache.camel.builder.SimpleBuilder;
029import org.apache.camel.spi.Metadata;
030import org.apache.camel.util.ObjectHelper;
031
032/**
033 * For expressions and predicates using the simple language
034 *
035 * @version 
036 */
037@Metadata(label = "language", title = "Simple")
038@XmlRootElement(name = "simple")
039@XmlAccessorType(XmlAccessType.FIELD)
040public class SimpleExpression extends ExpressionDefinition {
041    @XmlAttribute(name = "resultType")
042    private String resultTypeName;
043    @XmlTransient
044    private Class<?> resultType;
045
046    public SimpleExpression() {
047    }
048
049    public SimpleExpression(String expression) {
050        super(expression);
051    }
052
053    public SimpleExpression(Expression expression) {
054        super(expression);
055    }
056
057    public String getLanguage() {
058        return "simple";
059    }
060
061    public Class<?> getResultType() {
062        return resultType;
063    }
064
065    /**
066     * Sets the class of the result type (type from output)
067     */
068    public void setResultType(Class<?> resultType) {
069        this.resultType = resultType;
070    }
071
072    public String getResultTypeName() {
073        return resultTypeName;
074    }
075
076    /**
077     * Sets the class name of the result type (type from output)
078     */
079    public void setResultTypeName(String resultTypeName) {
080        this.resultTypeName = resultTypeName;
081    }
082
083    @Override
084    public Expression createExpression(CamelContext camelContext) {
085        if (resultType == null && resultTypeName != null) {
086            try {
087                resultType = camelContext.getClassResolver().resolveMandatoryClass(resultTypeName);
088            } catch (ClassNotFoundException e) {
089                throw ObjectHelper.wrapRuntimeCamelException(e);
090            }
091        }
092
093        String exp = getExpression();
094        // should be true by default
095        boolean isTrim = getTrim() == null || getTrim();
096        if (exp != null && isTrim) {
097            exp = exp.trim();
098        }
099
100        SimpleBuilder answer = new SimpleBuilder(exp);
101        answer.setResultType(resultType);
102        return answer;
103    }
104
105    @Override
106    public Predicate createPredicate(CamelContext camelContext) {
107        // SimpleBuilder is also a Predicate
108        return (Predicate) createExpression(camelContext);
109    }
110}