/**
* 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 org.apache.camel.Expression;
import org.apache.camel.model.language.ConstantExpression;
import org.apache.camel.model.language.ExchangePropertyExpression;
import org.apache.camel.model.language.HeaderExpression;
import org.apache.camel.model.language.LanguageExpression;
import org.apache.camel.model.language.MethodCallExpression;
import org.apache.camel.model.language.SimpleExpression;
import org.apache.camel.util.ObjectHelper;
/**
* A helper class for including portions of the <a
* href="http://camel.apache.org/expression.html">expression</a> and
* <a href="http://camel.apache.org/predicate.html">predicate</a> <a
* href="http://camel.apache.org/dsl.html">Java DSL</a>
* <p/>
* Implementation of this builder should favor build expressions using the definition classes
* from the <tt>org.apache.camel.model.language</tt> package, to build the routes using the same
* types as it would happen when using XML DSL.
*
* @version
*/
public final class Builder {
/**
* Utility classes should not have a public constructor.
*/
private Builder() {
}
/**
* Returns a <a href="http://camel.apache.org/bean-language.html">bean expression</a>
* value builder.
* <p/>
* This method accepts dual parameters. Either an bean instance or a reference to a bean (String).
*
* @param beanOrBeanRef either an instanceof a bean or a reference to bean to lookup in the Registry
* @return the builder
*/
public static ValueBuilder bean(final Object beanOrBeanRef) {
return bean(beanOrBeanRef, null);
}
/**
* Returns a <a href="http://camel.apache.org/bean-language.html">bean expression</a>
* value builder.
* <p/>
* This method accepts dual parameters. Either an bean instance or a reference to a bean (String).
*
* @param beanOrBeanRef either an instanceof a bean or a reference to bean to lookup in the Registry
* @param method the method name
* @return the builder
*/
public static ValueBuilder bean(Object beanOrBeanRef, String method) {
Expression exp;
if (beanOrBeanRef instanceof String) {
exp = new MethodCallExpression((String) beanOrBeanRef, method);
} else {
exp = new MethodCallExpression(beanOrBeanRef, method);
}
return new ValueBuilder(exp);
}
/**
* Returns a <a href="http://camel.apache.org/bean-language.html">bean expression</a>
* value builder
*
* @param beanType the bean class which will be invoked
* @param method name of method to invoke
* @return the builder
*/
public static ValueBuilder bean(Class<?> beanType, String method) {
Expression exp = new MethodCallExpression(beanType, method);
return new ValueBuilder(exp);
}
/**
* Returns a constant expression
*/
public static ValueBuilder constant(Object value) {
Expression exp;
if (value instanceof String) {
exp = new ConstantExpression((String) value);
} else {
exp = ExpressionBuilder.constantExpression(value);
}
return new ValueBuilder(exp);
}
/**
* Returns a constant expression
*/
public static ValueBuilder language(String language, String expression) {
Expression exp = new LanguageExpression(language, expression);
return new ValueBuilder(exp);
}
/**
* Returns a simple expression
*/
public static ValueBuilder simple(String value) {
Expression exp = new SimpleExpression(value);
return new ValueBuilder(exp);
}
/**
* Returns a simple expression
*/
public static ValueBuilder simple(String value, Class<?> resultType) {
SimpleExpression exp = new SimpleExpression(value);
exp.setResultType(resultType);
return new ValueBuilder(exp);
}
/**
* Returns a predicate and value builder for headers on an exchange
*/
public static ValueBuilder header(String name) {
Expression exp = new HeaderExpression(name);
return new ValueBuilder(exp);
}
/**
* Returns a predicate and value builder for properties on an exchange
*
* @deprecated use {@link #exchangeProperty(String)} instead
*/
@Deprecated
public static ValueBuilder property(String name) {
return exchangeProperty(name);
}
/**
* Returns a predicate and value builder for properties on an exchange
*/
public static ValueBuilder exchangeProperty(String name) {
Expression exp = new ExchangePropertyExpression(name);
return new ValueBuilder(exp);
}
/**
* Returns a predicate and value builder for the inbound body on an exchange
*/
public static ValueBuilder body() {
Expression exp = new SimpleExpression("${body}");
return new ValueBuilder(exp);
}
/**
* Returns a predicate and value builder for the inbound message body as a
* specific type
*/
public static <T> ValueBuilder bodyAs(Class<T> type) {
ObjectHelper.notNull(type, "type");
Expression exp = new SimpleExpression(String.format("${bodyAs(%s)}", type.getCanonicalName()));
return new ValueBuilder(exp);
}
/**
* Returns a predicate and value builder for the outbound body on an
* exchange
*
* @deprecated use {@link #body()}
*/
@Deprecated
public static ValueBuilder outBody() {
Expression exp = new SimpleExpression("${out.body}");
return new ValueBuilder(exp);
}
/**
* Returns a predicate and value builder for the outbound message body as a
* specific type
*
* @deprecated use {@link #bodyAs(Class)}
*/
@Deprecated
public static <T> ValueBuilder outBodyAs(Class<T> type) {
Expression expression = ExpressionBuilder.outBodyExpression(type);
return new ValueBuilder(expression);
}
/**
* Returns a predicate and value builder for the fault body on an
* exchange
*/
public static ValueBuilder faultBody() {
Expression expression = ExpressionBuilder.faultBodyExpression();
return new ValueBuilder(expression);
}
/**
* Returns a predicate and value builder for the fault message body as a
* specific type
*
* @deprecated use {@link #bodyAs(Class)}
*/
@Deprecated
public static <T> ValueBuilder faultBodyAs(Class<T> type) {
Expression expression = ExpressionBuilder.faultBodyExpression(type);
return new ValueBuilder(expression);
}
/**
* Returns an expression for the given system property
*/
public static ValueBuilder systemProperty(final String name) {
Expression exp = new SimpleExpression(String.format("${sys.%s}", name));
return new ValueBuilder(exp);
}
/**
* Returns an expression for the given system property
*/
public static ValueBuilder systemProperty(final String name, final String defaultValue) {
return new ValueBuilder(ExpressionBuilder.systemPropertyExpression(name, defaultValue));
}
/**
* Returns a predicate and value builder for the exception message on an exchange
*/
public static ValueBuilder exceptionMessage() {
Expression exp = new SimpleExpression("${exception.message}");
return new ValueBuilder(exp);
}
/**
* Returns a predicate and value builder for the exception stacktrace on an exchange
*/
public static ValueBuilder exceptionStackTrace() {
Expression exp = new SimpleExpression("${exception.stacktrace}");
return new ValueBuilder(exp);
}
/**
* Returns an expression that replaces all occurrences of the regular
* expression with the given replacement
*/
public static ValueBuilder regexReplaceAll(Expression content, String regex, String replacement) {
Expression newExp = ExpressionBuilder.regexReplaceAll(content, regex, replacement);
return new ValueBuilder(newExp);
}
/**
* Returns an expression that replaces all occurrences of the regular
* expression with the given replacement
*/
public static ValueBuilder regexReplaceAll(Expression content, String regex, Expression replacement) {
Expression newExp = ExpressionBuilder.regexReplaceAll(content, regex, replacement);
return new ValueBuilder(newExp);
}
/**
* Returns an expression processing the exchange to the given endpoint uri.
*
* @param uri endpoint uri
* @return the builder
* @deprecated not in use, and not available in XML DSL
*/
@Deprecated
public static ValueBuilder sendTo(String uri) {
Expression expression = ExpressionBuilder.toExpression(uri);
return new ValueBuilder(expression);
}
}