+/*
+ * Copyright 2005-2011 the original author or authors.
+ *
+ * Licensed 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.wamblee.xmlrouter.config;
+
+import org.wamblee.xml.XMLDocument;
+import org.wamblee.xml.XMLException;
+import org.wamblee.xml.XMLProcessor;
+import org.wamblee.xml.XPathExpression;
+
+/**
+ * Basic rule for XML routing.
+ *
+ * @author Erik Brakkee
+ */
+public class Rule {
+
+ private XPathExpression condition;
+ private XMLProcessor processor;
+ private String destination;
+
+ /**
+ * Constructs the rule.
+ * @param aCondition Condition to be satisfied.
+ * @param aProcessor XML Processor to be applied when the condition is valid.
+ * @param aDestination Destination for the result of this rule.
+ */
+ public Rule(XPathExpression aCondition, XMLProcessor aProcessor, String aDestination) {
+ condition = aCondition;
+ processor = aProcessor;
+ destination = aDestination;
+ }
+
+ /**
+ * Applies the rule to a document.
+ * @param aDocument Document to apply rule ot.
+ * @return Transformed document or null if the rule did not apply.
+ * @throws XMLException In case the application of the rule gives an error.
+ */
+ public XMLDocument apply(XMLDocument aDocument) throws XMLException {
+ if ( !condition.booleanEval(aDocument)) {
+ return null;
+ }
+ return aDocument.process(processor);
+ }
+
+ public String getDestination() {
+ return destination;
+ }
+}