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.component.mock;
018
019 import java.util.ArrayList;
020 import java.util.Date;
021 import java.util.List;
022
023 import org.apache.camel.Exchange;
024 import org.apache.camel.Expression;
025 import org.apache.camel.Predicate;
026 import org.apache.camel.builder.ExpressionClause;
027 import org.apache.camel.builder.ExpressionClauseSupport;
028 import org.apache.camel.builder.ValueBuilder;
029 import org.apache.camel.model.language.ExpressionDefinition;
030 import org.apache.camel.util.PredicateAssertHelper;
031
032 /**
033 * A builder of assertions on message exchanges
034 *
035 * @version
036 */
037 public abstract class AssertionClause extends ExpressionClauseSupport<ValueBuilder> implements Runnable {
038
039 protected final MockEndpoint mock;
040 protected volatile int currentIndex;
041 private final List<Predicate> predicates = new ArrayList<Predicate>();
042 private final Expression previous = new PreviousTimestamp();
043 private final Expression next = new NextTimestamp();
044
045 public AssertionClause(MockEndpoint mock) {
046 super(null);
047 this.mock = mock;
048 }
049
050 // Builder methods
051 // -------------------------------------------------------------------------
052
053 public ValueBuilder expression(Expression expression) {
054 // must override this method as we provide null in the constructor
055 super.expression(expression);
056 return new PredicateValueBuilder(getExpressionValue());
057 }
058
059 public ValueBuilder expression(ExpressionDefinition expression) {
060 // must override this method as we provide null in the constructor
061 super.expression(expression);
062 return new PredicateValueBuilder(expression.createExpression(mock.getCamelContext()));
063 }
064
065 /**
066 * Adds the given predicate to this assertion clause
067 */
068 public AssertionClause predicate(Predicate predicate) {
069 addPredicate(predicate);
070 return this;
071 }
072
073 /**
074 * Adds the given predicate to this assertion clause
075 */
076 public ExpressionClause<AssertionClause> predicate() {
077 ExpressionClause<AssertionClause> clause = new ExpressionClause<AssertionClause>(this);
078 addPredicate(clause);
079 return clause;
080 }
081
082 /**
083 * Adds a {@link TimeClause} predicate for message arriving.
084 */
085 public TimeClause arrives() {
086 final TimeClause clause = new TimeClause(previous, next);
087 addPredicate(new Predicate() {
088 public boolean matches(Exchange exchange) {
089 return clause.matches(exchange);
090 }
091
092 @Override
093 public String toString() {
094 return "arrives " + clause.toString() + " exchange";
095 }
096 });
097 return clause;
098 }
099
100 /**
101 * Performs any assertions on the given exchange
102 */
103 protected void applyAssertionOn(MockEndpoint endpoint, int index, Exchange exchange) {
104 for (Predicate predicate : predicates) {
105 currentIndex = index;
106 PredicateAssertHelper.assertMatches(predicate, "Assertion error at index " + index + " on mock " + endpoint.getEndpointUri() + " with predicate: ", exchange);
107 }
108 }
109
110 protected void addPredicate(Predicate predicate) {
111 predicates.add(predicate);
112 }
113
114 @SuppressWarnings("unchecked")
115 private final class PreviousTimestamp implements Expression {
116 public <T> T evaluate(Exchange exchange, Class<T> type) {
117 Date answer = null;
118 if (currentIndex > 0 && mock.getReceivedCounter() > 0) {
119 answer = mock.getReceivedExchanges().get(currentIndex - 1).getProperty(Exchange.RECEIVED_TIMESTAMP, Date.class);
120 }
121 return (T) answer;
122 }
123 }
124
125 @SuppressWarnings("unchecked")
126 private final class NextTimestamp implements Expression {
127 public <T> T evaluate(Exchange exchange, Class<T> type) {
128 Date answer = null;
129 if (currentIndex < mock.getReceivedCounter() - 1) {
130 answer = mock.getReceivedExchanges().get(currentIndex + 1).getProperty(Exchange.RECEIVED_TIMESTAMP, Date.class);
131 }
132 return (T) answer;
133 }
134 }
135
136 /**
137 * Public class needed for fluent builders
138 */
139 public final class PredicateValueBuilder extends ValueBuilder {
140
141 public PredicateValueBuilder(Expression expression) {
142 super(expression);
143 }
144
145 protected Predicate onNewPredicate(Predicate predicate) {
146 predicate = super.onNewPredicate(predicate);
147 addPredicate(predicate);
148 return predicate;
149 }
150 }
151 }