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.model.language;
018
019 import javax.xml.bind.annotation.XmlAccessType;
020 import javax.xml.bind.annotation.XmlAccessorType;
021 import javax.xml.bind.annotation.XmlAttribute;
022 import javax.xml.bind.annotation.XmlID;
023 import javax.xml.bind.annotation.XmlTransient;
024 import javax.xml.bind.annotation.XmlType;
025 import javax.xml.bind.annotation.XmlValue;
026 import javax.xml.bind.annotation.adapters.CollapsedStringAdapter;
027 import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
028
029 import org.apache.camel.CamelContext;
030 import org.apache.camel.Exchange;
031 import org.apache.camel.Expression;
032 import org.apache.camel.Predicate;
033 import org.apache.camel.impl.RouteContext;
034 import org.apache.camel.spi.Language;
035
036 /**
037 * A useful base class for an expression
038 *
039 * @version $Revision: 1.1 $
040 */
041 @XmlType(name = "expressionType")
042 @XmlAccessorType(XmlAccessType.FIELD)
043 public class ExpressionType {
044 @XmlAttribute
045 @XmlJavaTypeAdapter(CollapsedStringAdapter.class)
046 @XmlID
047 private String id;
048 @XmlValue
049 private String expression;
050 @XmlTransient
051 private Predicate predicate;
052 @XmlTransient
053 private Expression expressionValue;
054
055 public ExpressionType() {
056 }
057
058 public ExpressionType(String expression) {
059 this.expression = expression;
060 }
061
062 public ExpressionType(Predicate predicate) {
063 this.predicate = predicate;
064 }
065
066 public ExpressionType(Expression expression) {
067 this.expressionValue = expression;
068 }
069
070 @Override
071 public String toString() {
072 return getLanguage() + "Expression[" + getExpression() + "]";
073 }
074
075 public String getLanguage() {
076 return "";
077 }
078
079 public Predicate<Exchange> createPredicate(RouteContext route) {
080 if (predicate == null) {
081 CamelContext camelContext = route.getCamelContext();
082 Language language = camelContext.resolveLanguage(getLanguage());
083 predicate = language.createPredicate(getExpression());
084 }
085 return predicate;
086 }
087
088 public Expression createExpression(RouteContext routeContext) {
089 if (expressionValue == null) {
090 CamelContext camelContext = routeContext.getCamelContext();
091 Language language = camelContext.resolveLanguage(getLanguage());
092 expressionValue = language.createExpression(getExpression());
093 }
094 return expressionValue;
095 }
096
097 public String getExpression() {
098 return expression;
099 }
100
101 public void setExpression(String expression) {
102 this.expression = expression;
103 }
104
105 /**
106 * Gets the value of the id property.
107 *
108 * @return possible object is
109 * {@link String }
110 */
111 public String getId() {
112 return id;
113 }
114
115 /**
116 * Sets the value of the id property.
117 *
118 * @param value allowed object is
119 * {@link String }
120 */
121 public void setId(String value) {
122 this.id = value;
123 }
124 }