org.apache.synapse.commons.util.PropertyHelper Maven / Gradle / Ivy
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* 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.synapse.commons.util;
import org.apache.axiom.om.OMElement;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.commons.SynapseCommonsException;
import javax.xml.namespace.QName;
import java.lang.reflect.Method;
/**
* This class will be used as a Helper class to get the properties loaded while building the
* Synapse Configuration from the XML
*/
public class PropertyHelper {
/**
* Log variable for the logging purposes
*/
private static final Log log = LogFactory.getLog(PropertyHelper.class);
/**
* Find and invoke the setter method with the name of form setXXX passing in the value given
* on the POJO object
*
* @param name name of the setter field
* @param val value to be set
* @param obj POJO instance
*/
public static void setInstanceProperty(String name, Object val, Object obj) {
String mName = "set" + Character.toUpperCase(name.charAt(0)) + name.substring(1);
Method method;
try {
Method[] methods = obj.getClass().getMethods();
boolean invoked = false;
for (Method method1 : methods) {
if (mName.equals(method1.getName())) {
Class[] params = method1.getParameterTypes();
if (params.length != 1) {
handleException("Did not find a setter method named : " + mName +
"() that takes a single String, int, long, float, double ," +
"OMElement or boolean parameter");
} else if (val instanceof String) {
String value = (String) val;
if (String.class.equals(params[0])) {
method = obj.getClass().getMethod(mName, String.class);
method.invoke(obj, new String[]{value});
} else if (int.class.equals(params[0])) {
method = obj.getClass().getMethod(mName, int.class);
method.invoke(obj, new Integer[]{new Integer(value)});
} else if (long.class.equals(params[0])) {
method = obj.getClass().getMethod(mName, long.class);
method.invoke(obj, new Long[]{new Long(value)});
} else if (float.class.equals(params[0])) {
method = obj.getClass().getMethod(mName, float.class);
method.invoke(obj, new Float[]{new Float(value)});
} else if (double.class.equals(params[0])) {
method = obj.getClass().getMethod(mName, double.class);
method.invoke(obj, new Double[]{new Double(value)});
} else if (boolean.class.equals(params[0])) {
method = obj.getClass().getMethod(mName, boolean.class);
method.invoke(obj, new Boolean[]{Boolean.valueOf(value)});
} else {
continue;
}
} else if (val instanceof OMElement && OMElement.class.equals(params[0])) {
method = obj.getClass().getMethod(mName, OMElement.class);
method.invoke(obj, new OMElement[]{(OMElement) val});
} else {
continue;
}
invoked = true;
break;
}
}
if (!invoked) {
handleException("Did not find a setter method named : " + mName +
"() that takes a single String, int, long, float, double " +
"or boolean parameter");
}
} catch (Exception e) {
handleException("Error invoking setter method named : " + mName +
"() that takes a single String, int, long, float, double " +
"or boolean parameter", e);
}
}
/**
* This method will set the static property discribed in the OMElement to the specified object.
* This Object should have the setter method for the specified property name
*
* @param property - OMElement specifying the property to be built in to the object
* @param o - Object to which the specified property will be set.
*/
public static void setStaticProperty(OMElement property, Object o) {
if (("property".equals(property.getLocalName().toLowerCase()))) {
String propertyName = property.getAttributeValue(new QName("name"));
String mName = "set"
+ Character.toUpperCase(propertyName.charAt(0))
+ propertyName.substring(1);
// try to set String value first
if (property.getAttributeValue(new QName("value")) != null) {
String value = property.getAttributeValue(new QName("value"));
setInstanceProperty(propertyName, value, o);
} else {
// now try XML child
OMElement value = property.getFirstElement();
if (value != null) {
try {
Method method = o.getClass().getMethod(mName, OMElement.class);
if (log.isDebugEnabled()) {
log.debug("Setting property :: invoking method "
+ mName + "(" + value + ")");
}
method.invoke(o, value);
} catch (Exception e) {
handleException("Error setting property : " + propertyName
+ " as an OMElement property into class mediator : "
+ o.getClass() + " : " + e.getMessage(), e);
}
}
}
}
}
/**
* This method will check the given OMElement represent either a static property or not
*
* @param property - OMElement to be checked for the static property
* @return boolean true if the elemet represents a static property element false otherwise
*/
public static boolean isStaticProperty(OMElement property) {
return "property".equals(property.getLocalName().toLowerCase())
&& (property.getAttributeValue(new QName("expression")) == null);
}
private static void handleException(String message, Throwable e) {
log.error(message + e.getMessage());
throw new SynapseCommonsException(message, e);
}
private static void handleException(String message) {
log.error(message);
throw new SynapseCommonsException(message);
}
}
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