/*
* Copyright 2002-2010 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.springframework.transaction.interceptor;
import java.io.Serializable;
import java.lang.reflect.Method;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.util.ObjectUtils;
import org.springframework.util.PatternMatchUtils;
/**
* Simple {@link TransactionAttributeSource} implementation that
* allows attributes to be matched by registered name.
*
* @author Juergen Hoeller
* @since 21.08.2003
* @see #isMatch
* @see MethodMapTransactionAttributeSource
*/
public class NameMatchTransactionAttributeSource implements TransactionAttributeSource, Serializable {
/**
* Logger available to subclasses.
* <p>Static for optimal serialization.
*/
protected static final Log logger = LogFactory.getLog(NameMatchTransactionAttributeSource.class);
/** Keys are method names; values are TransactionAttributes */
private Map<String, TransactionAttribute> nameMap = new HashMap<String, TransactionAttribute>();
/**
* Set a name/attribute map, consisting of method names
* (e.g. "myMethod") and TransactionAttribute instances
* (or Strings to be converted to TransactionAttribute instances).
* @see TransactionAttribute
* @see TransactionAttributeEditor
*/
public void setNameMap(Map<String, TransactionAttribute> nameMap) {
for (Map.Entry<String, TransactionAttribute> entry : nameMap.entrySet()) {
addTransactionalMethod(entry.getKey(), entry.getValue());
}
}
/**
* Parses the given properties into a name/attribute map.
* Expects method names as keys and String attributes definitions as values,
* parsable into TransactionAttribute instances via TransactionAttributeEditor.
* @see #setNameMap
* @see TransactionAttributeEditor
*/
public void setProperties(Properties transactionAttributes) {
TransactionAttributeEditor tae = new TransactionAttributeEditor();
Enumeration propNames = transactionAttributes.propertyNames();
while (propNames.hasMoreElements()) {
String methodName = (String) propNames.nextElement();
String value = transactionAttributes.getProperty(methodName);
tae.setAsText(value);
TransactionAttribute attr = (TransactionAttribute) tae.getValue();
addTransactionalMethod(methodName, attr);
}
}
/**
* Add an attribute for a transactional method.
* <p>Method names can be exact matches, or of the pattern "xxx*",
* "*xxx" or "*xxx*" for matching multiple methods.
* @param methodName the name of the method
* @param attr attribute associated with the method
*/
public void addTransactionalMethod(String methodName, TransactionAttribute attr) {
if (logger.isDebugEnabled()) {
logger.debug("Adding transactional method [" + methodName + "] with attribute [" + attr + "]");
}
this.nameMap.put(methodName, attr);
}
public TransactionAttribute getTransactionAttribute(Method method, Class<?> targetClass) {
// look for direct name match
String methodName = method.getName();
TransactionAttribute attr = this.nameMap.get(methodName);
if (attr == null) {
// Look for most specific name match.
String bestNameMatch = null;
for (String mappedName : this.nameMap.keySet()) {
if (isMatch(methodName, mappedName) &&
(bestNameMatch == null || bestNameMatch.length() <= mappedName.length())) {
attr = this.nameMap.get(mappedName);
bestNameMatch = mappedName;
}
}
}
return attr;
}
/**
* Return if the given method name matches the mapped name.
* <p>The default implementation checks for "xxx*", "*xxx" and "*xxx*" matches,
* as well as direct equality. Can be overridden in subclasses.
* @param methodName the method name of the class
* @param mappedName the name in the descriptor
* @return if the names match
* @see org.springframework.util.PatternMatchUtils#simpleMatch(String, String)
*/
protected boolean isMatch(String methodName, String mappedName) {
return PatternMatchUtils.simpleMatch(mappedName, methodName);
}
@Override
public boolean equals(Object other) {
if (this == other) {
return true;
}
if (!(other instanceof NameMatchTransactionAttributeSource)) {
return false;
}
NameMatchTransactionAttributeSource otherTas = (NameMatchTransactionAttributeSource) other;
return ObjectUtils.nullSafeEquals(this.nameMap, otherTas.nameMap);
}
@Override
public int hashCode() {
return NameMatchTransactionAttributeSource.class.hashCode();
}
@Override
public String toString() {
return getClass().getName() + ": " + this.nameMap;
}
}
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