/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.camel.builder;
import java.util.Map;
import org.apache.camel.CamelContext;
import org.apache.camel.Expression;
import org.apache.camel.builder.xml.Namespaces;
import org.apache.camel.model.language.ExpressionDefinition;
import org.apache.camel.model.language.MethodCallExpression;
import org.apache.camel.model.language.XPathExpression;
import org.apache.camel.model.language.XQueryExpression;
import org.apache.camel.spi.Language;
import org.apache.camel.util.ObjectHelper;
/**
* @version $Revision: 906378 $
*/
public class ExpressionClauseSupport<T> {
private T result;
private String language;
private String expression;
private Expression expressionValue;
private ExpressionDefinition expressionType;
public ExpressionClauseSupport(T result) {
this.result = result;
}
// Helper expressions
// -------------------------------------------------------------------------
/**
* Specify an {@link org.apache.camel.Expression} instance
*/
public T expression(Expression expression) {
setExpressionValue(expression);
return result;
}
/**
* Specify the constant expression value
*/
public T constant(Object value) {
return expression(ExpressionBuilder.constantExpression(value));
}
/**
* An expression of the exchange
*/
public T exchange() {
return expression(ExpressionBuilder.exchangeExpression());
}
/**
* An expression of an inbound message
*/
public T inMessage() {
return expression(ExpressionBuilder.inMessageExpression());
}
/**
* An expression of an inbound message
*/
public T outMessage() {
return expression(ExpressionBuilder.outMessageExpression());
}
/**
* An expression of an inbound message body
*/
public T body() {
return expression(ExpressionBuilder.bodyExpression());
}
/**
* An expression of an inbound message body converted to the expected type
*/
@SuppressWarnings("unchecked")
public T body(Class expectedType) {
return expression(ExpressionBuilder.bodyExpression(expectedType));
}
/**
* An expression of an outbound message body
*/
public T outBody() {
return expression(ExpressionBuilder.outBodyExpression());
}
/**
* An expression of an outbound message body converted to the expected type
*/
@SuppressWarnings("unchecked")
public T outBody(Class expectedType) {
return expression(ExpressionBuilder.outBodyExpression(expectedType));
}
/**
* An expression of an inbound message header of the given name
*/
public T header(String name) {
return expression(ExpressionBuilder.headerExpression(name));
}
/**
* An expression of the inbound headers
*/
public T headers() {
return expression(ExpressionBuilder.headersExpression());
}
/**
* An expression of an outbound message header of the given name
*/
public T outHeader(String name) {
return expression(ExpressionBuilder.outHeaderExpression(name));
}
/**
* An expression of the outbound headers
*/
public T outHeaders() {
return expression(ExpressionBuilder.outHeadersExpression());
}
/**
* An expression of an exchange property of the given name
*/
public T property(String name) {
return expression(ExpressionBuilder.propertyExpression(name));
}
/**
* An expression of the exchange properties
*/
public T properties() {
return expression(ExpressionBuilder.propertiesExpression());
}
// Languages
// -------------------------------------------------------------------------
/**
* Evaluates an expression using the <a
* href="http://camel.apache.org/bean-language.html>bean language</a>
* which basically means the bean is invoked to determine the expression
* value.
*
* @param bean the name of the bean looked up the registry
* @return the builder to continue processing the DSL
*/
public T method(String bean) {
MethodCallExpression expression = new MethodCallExpression(bean);
setExpressionType(expression);
return result;
}
/**
* Evaluates an expression using the <a
* href="http://camel.apache.org/bean-language.html>bean language</a>
* which basically means the bean is invoked to determine the expression
* value.
*
* @param instance the instance of the bean
* @return the builder to continue processing the DSL
*/
public T method(Object instance) {
MethodCallExpression expression = new MethodCallExpression(instance);
setExpressionType(expression);
return result;
}
/**
* Evaluates an expression using the <a
* href="http://camel.apache.org/bean-language.html>bean language</a>
* which basically means the bean is invoked to determine the expression
* value.
*
* @param beanType the Class of the bean which we want to invoke
* @return the builder to continue processing the DSL
*/
public T method(Class<?> beanType) {
MethodCallExpression expression = new MethodCallExpression(beanType);
setExpressionType(expression);
return result;
}
/**
* Evaluates an expression using the <a
* href="http://camel.apache.org/bean-language.html>bean language</a>
* which basically means the bean is invoked to determine the expression
* value.
*
* @param bean the name of the bean looked up the registry
* @param method the name of the method to invoke on the bean
* @return the builder to continue processing the DSL
*/
public T method(String bean, String method) {
MethodCallExpression expression = new MethodCallExpression(bean, method);
setExpressionType(expression);
return result;
}
/**
* Evaluates an expression using the <a
* href="http://camel.apache.org/bean-language.html>bean language</a>
* which basically means the bean is invoked to determine the expression
* value.
*
* @param instance the instance of the bean
* @param method the name of the method to invoke on the bean
* @return the builder to continue processing the DSL
*/
public T method(Object instance, String method) {
MethodCallExpression expression = new MethodCallExpression(instance, method);
setExpressionType(expression);
return result;
}
/**
* Evaluates an expression using the <a
* href="http://camel.apache.org/bean-language.html>bean language</a>
* which basically means the bean is invoked to determine the expression
* value.
*
* @param beanType the Class of the bean which we want to invoke
* @param method the name of the method to invoke on the bean
* @return the builder to continue processing the DSL
*/
public T method(Class<?> beanType, String method) {
MethodCallExpression expression = new MethodCallExpression(beanType, method);
setExpressionType(expression);
return result;
}
/**
* Evaluates the <a href="http://camel.apache.org/el.html">EL
* Language from JSP and JSF</a> using the <a
* href="http://camel.apache.org/juel.html">JUEL library</a>
*
* @param text the expression to be evaluated
* @return the builder to continue processing the DSL
*/
public T el(String text) {
return language("el", text);
}
/**
* Evaluates a <a href="http://camel.apache.org/groovy.html">Groovy
* expression</a>
*
* @param text the expression to be evaluated
* @return the builder to continue processing the DSL
*/
public T groovy(String text) {
return language("groovy", text);
}
/**
* Evaluates a <a
* href="http://camel.apache.org/java-script.html">JavaScript
* expression</a>
*
* @param text the expression to be evaluated
* @return the builder to continue processing the DSL
*/
public T javaScript(String text) {
return language("js", text);
}
/**
* Evaluates a <a href="http://commons.apache.org/jxpath/">JXPath expression</a>
*
* @param text the expression to be evaluated
* @return the builder to continue processing the DSL
*/
public T jxpath(String text) {
return language("jxpath", text);
}
/**
* Evaluates an <a href="http://camel.apache.org/ognl.html">OGNL
* expression</a>
*
* @param text the expression to be evaluated
* @return the builder to continue processing the DSL
*/
public T ognl(String text) {
return language("ognl", text);
}
/**
* Evaluates a <a href="http://camel.apache.org/mvel.html">MVEL
* expression</a>
*
* @param text the expression to be evaluated
* @return the builder to continue processing the DSL
*/
public T mvel(String text) {
return language("mvel", text);
}
/**
* Evaluates a <a href="http://camel.apache.org/php.html">PHP
* expression</a>
*
* @param text the expression to be evaluated
* @return the builder to continue processing the DSL
*/
public T php(String text) {
return language("php", text);
}
/**
* Evaluates a <a href="http://camel.apache.org/python.html">Python
* expression</a>
*
* @param text the expression to be evaluated
* @return the builder to continue processing the DSL
*/
public T python(String text) {
return language("python", text);
}
/**
* Evaluates a <a href="http://camel.apache.org/ruby.html">Ruby
* expression</a>
*
* @param text the expression to be evaluated
* @return the builder to continue processing the DSL
*/
public T ruby(String text) {
return language("ruby", text);
}
/**
* Evaluates an <a href="http://camel.apache.org/sql.html">SQL
* expression</a>
*
* @param text the expression to be evaluated
* @return the builder to continue processing the DSL
*/
public T sql(String text) {
return language("sql", text);
}
/**
* Evaluates a <a href="http://camel.apache.org/simple.html">Simple
* expression</a>
*
* @param text the expression to be evaluated
* @return the builder to continue processing the DSL
*/
public T simple(String text) {
return language("simple", text);
}
/**
* Evaluates an <a href="http://camel.apache.org/xpath.html">XPath
* expression</a>
*
* @param text the expression to be evaluated
* @return the builder to continue processing the DSL
*/
public T xpath(String text) {
return language("xpath", text);
}
/**
* Evaluates an <a href="http://camel.apache.org/xpath.html">XPath
* expression</a> with the specified result type
*
* @param text the expression to be evaluated
* @param resultType the return type expected by the expression
* @return the builder to continue processing the DSL
*/
public T xpath(String text, Class<?> resultType) {
XPathExpression expression = new XPathExpression(text);
expression.setResultType(resultType);
setExpressionType(expression);
return result;
}
/**
* Evaluates an <a href="http://camel.apache.org/xpath.html">XPath
* expression</a> with the specified result type and set of namespace
* prefixes and URIs
*
* @param text the expression to be evaluated
* @param resultType the return type expected by the expression
* @param namespaces the namespace prefix and URIs to use
* @return the builder to continue processing the DSL
*/
public T xpath(String text, Class<?> resultType, Namespaces namespaces) {
return xpath(text, resultType, namespaces.getNamespaces());
}
/**
* Evaluates an <a href="http://camel.apache.org/xpath.html">XPath
* expression</a> with the specified result type and set of namespace
* prefixes and URIs
*
* @param text the expression to be evaluated
* @param resultType the return type expected by the expression
* @param namespaces the namespace prefix and URIs to use
* @return the builder to continue processing the DSL
*/
public T xpath(String text, Class<?> resultType, Map<String, String> namespaces) {
XPathExpression expression = new XPathExpression(text);
expression.setResultType(resultType);
expression.setNamespaces(namespaces);
setExpressionType(expression);
return result;
}
/**
* Evaluates an <a href="http://camel.apache.org/xpath.html">XPath
* expression</a> with the specified set of namespace prefixes and URIs
*
* @param text the expression to be evaluated
* @param namespaces the namespace prefix and URIs to use
* @return the builder to continue processing the DSL
*/
public T xpath(String text, Namespaces namespaces) {
return xpath(text, namespaces.getNamespaces());
}
/**
* Evaluates an <a href="http://camel.apache.org/xpath.html">XPath
* expression</a> with the specified set of namespace prefixes and URIs
*
* @param text the expression to be evaluated
* @param namespaces the namespace prefix and URIs to use
* @return the builder to continue processing the DSL
*/
public T xpath(String text, Map<String, String> namespaces) {
XPathExpression expression = new XPathExpression(text);
expression.setNamespaces(namespaces);
setExpressionType(expression);
return result;
}
/**
* Evaluates an <a
* href="http://camel.apache.org/xquery.html">XQuery expression</a>
*
* @param text the expression to be evaluated
* @return the builder to continue processing the DSL
*/
public T xquery(String text) {
return language("xquery", text);
}
/**
* Evaluates an <a
* href="http://camel.apache.org/xquery.html">XQuery expression</a>
* with the specified result type
*
* @param text the expression to be evaluated
* @param resultType the return type expected by the expressiopn
* @return the builder to continue processing the DSL
*/
public T xquery(String text, Class<?> resultType) {
XQueryExpression expression = new XQueryExpression(text);
expression.setResultType(resultType);
setExpressionType(expression);
return result;
}
/**
* Evaluates an <a
* href="http://camel.apache.org/xquery.html">XQuery expression</a>
* with the specified result type and set of namespace prefixes and URIs
*
* @param text the expression to be evaluated
* @param resultType the return type expected by the expression
* @param namespaces the namespace prefix and URIs to use
* @return the builder to continue processing the DSL
*/
public T xquery(String text, Class<?> resultType, Namespaces namespaces) {
return xquery(text, resultType, namespaces.getNamespaces());
}
/**
* Evaluates an <a
* href="http://camel.apache.org/xquery.html">XQuery expression</a>
* with the specified result type and set of namespace prefixes and URIs
*
* @param text the expression to be evaluated
* @param resultType the return type expected by the expression
* @param namespaces the namespace prefix and URIs to use
* @return the builder to continue processing the DSL
*/
public T xquery(String text, Class<?> resultType, Map<String, String> namespaces) {
XQueryExpression expression = new XQueryExpression(text);
expression.setResultType(resultType);
expression.setNamespaces(namespaces);
setExpressionType(expression);
return result;
}
/**
* Evaluates an <a
* href="http://camel.apache.org/xquery.html">XQuery expression</a>
* with the specified set of namespace prefixes and URIs
*
* @param text the expression to be evaluated
* @param namespaces the namespace prefix and URIs to use
* @return the builder to continue processing the DSL
*/
public T xquery(String text, Namespaces namespaces) {
return xquery(text, namespaces.getNamespaces());
}
/**
* Evaluates an <a
* href="http://camel.apache.org/xquery.html">XQuery expression</a>
* with the specified set of namespace prefixes and URIs
*
* @param text the expression to be evaluated
* @param namespaces the namespace prefix and URIs to use
* @return the builder to continue processing the DSL
*/
public T xquery(String text, Map<String, String> namespaces) {
XQueryExpression expression = new XQueryExpression(text);
expression.setNamespaces(namespaces);
setExpressionType(expression);
return result;
}
/**
* Evaluates a given language name with the expression text
*
* @param language the name of the language
* @param expression the expression in the given language
* @return the builder to continue processing the DSL
*/
public T language(String language, String expression) {
setLanguage(language);
setExpression(expression);
return result;
}
// Properties
// -------------------------------------------------------------------------
public String getLanguage() {
return language;
}
public void setLanguage(String language) {
this.language = language;
}
public String getExpression() {
return expression;
}
public void setExpression(String expression) {
this.expression = expression;
}
public Expression getExpressionValue() {
return expressionValue;
}
public void setExpressionValue(Expression expressionValue) {
this.expressionValue = expressionValue;
}
public ExpressionDefinition getExpressionType() {
return expressionType;
}
public void setExpressionType(ExpressionDefinition expressionType) {
this.expressionType = expressionType;
}
protected Expression createExpression(CamelContext camelContext) {
if (getExpressionValue() == null) {
if (getExpressionType() != null) {
setExpressionValue(getExpressionType().createExpression(camelContext));
} else if (getExpression() != null) {
ObjectHelper.notNull("language", getLanguage());
Language language = camelContext.resolveLanguage(getLanguage());
setExpressionValue(language.createExpression(getExpression()));
configureExpression(camelContext, getExpressionValue());
}
}
return getExpressionValue();
}
protected void configureExpression(CamelContext camelContext, Expression expression) {
}
}