org.acegisecurity.intercept.method.MethodDefinitionMap Maven / Gradle / Ivy
/* Copyright 2004, 2005 Acegi Technology Pty Limited
*
* 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.acegisecurity.intercept.method;
import org.acegisecurity.ConfigAttribute;
import org.acegisecurity.ConfigAttributeDefinition;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
/**
* Stores a {@link ConfigAttributeDefinition} for each method signature defined
* in a bean context.
*
*
* For consistency with {@link MethodDefinitionAttributes} as well as support
* for MethodDefinitionSourceAdvisor, this implementation will
* return a ConfigAttributeDefinition containing all
* configuration attributes defined against:
*
*
* -
* The method-specific attributes defined for the intercepted method of the
* intercepted class.
*
* -
* The method-specific attributes defined by any explicitly implemented
* interface if that interface contains a method signature matching that of
* the intercepted method.
*
*
*
*
*
* In general you should therefore define the interface methods of your
* secure objects, not the implementations. For example, define
* com.company.Foo.findAll=ROLE_TEST but not
* com.company.FooImpl.findAll=ROLE_TEST.
*
*
* @author Ben Alex
* @version $Id: MethodDefinitionMap.java,v 1.6 2005/11/17 00:56:09 benalex Exp $
*/
public class MethodDefinitionMap extends AbstractMethodDefinitionSource {
//~ Static fields/initializers =============================================
private static final Log logger = LogFactory.getLog(MethodDefinitionMap.class);
//~ Instance fields ========================================================
/** Map from Method to ApplicationDefinition */
protected Map methodMap = new HashMap();
/** Map from Method to name pattern used for registration */
private Map nameMap = new HashMap();
//~ Methods ================================================================
/**
* Obtains the configuration attributes explicitly defined against this
* bean. This method will not return implicit configuration attributes
* that may be returned by {@link #lookupAttributes(Method)} as it does
* not have access to a method invocation at this time.
*
* @return the attributes explicitly defined against this bean
*/
public Iterator getConfigAttributeDefinitions() {
return methodMap.values().iterator();
}
/**
* Obtains the number of configuration attributes explicitly defined
* against this bean. This method will not return implicit configuration
* attributes that may be returned by {@link #lookupAttributes(Method)} as
* it does not have access to a method invocation at this time.
*
* @return the number of configuration attributes explicitly defined
* against this bean
*/
public int getMethodMapSize() {
return this.methodMap.size();
}
/**
* Add configuration attributes for a secure method. Method names can end
* or start with * for matching multiple methods.
*
* @param method the method to be secured
* @param attr required authorities associated with the method
*/
public void addSecureMethod(Method method, ConfigAttributeDefinition attr) {
logger.info("Adding secure method [" + method + "] with attributes ["
+ attr + "]");
this.methodMap.put(method, attr);
}
/**
* Add configuration attributes for a secure method. Method names can end
* or start with * for matching multiple methods.
*
* @param name class and method name, separated by a dot
* @param attr required authorities associated with the method
*
* @throws IllegalArgumentException DOCUMENT ME!
*/
public void addSecureMethod(String name, ConfigAttributeDefinition attr) {
int lastDotIndex = name.lastIndexOf(".");
if (lastDotIndex == -1) {
throw new IllegalArgumentException("'" + name
+ "' is not a valid method name: format is FQN.methodName");
}
String className = name.substring(0, lastDotIndex);
String methodName = name.substring(lastDotIndex + 1);
try {
Class clazz = Class.forName(className, true,
Thread.currentThread().getContextClassLoader());
addSecureMethod(clazz, methodName, attr);
} catch (ClassNotFoundException ex) {
throw new IllegalArgumentException("Class '" + className
+ "' not found");
}
}
/**
* Add configuration attributes for a secure method. Method names can end
* or start with * for matching multiple methods.
*
* @param clazz target interface or class
* @param mappedName mapped method name
* @param attr required authorities associated with the method
*
* @throws IllegalArgumentException DOCUMENT ME!
*/
public void addSecureMethod(Class clazz, String mappedName,
ConfigAttributeDefinition attr) {
String name = clazz.getName() + '.' + mappedName;
if (logger.isDebugEnabled()) {
logger.debug("Adding secure method [" + name
+ "] with attributes [" + attr + "]");
}
Method[] methods = clazz.getDeclaredMethods();
List matchingMethods = new ArrayList();
for (int i = 0; i < methods.length; i++) {
if (methods[i].getName().equals(mappedName)
|| isMatch(methods[i].getName(), mappedName)) {
matchingMethods.add(methods[i]);
}
}
if (matchingMethods.isEmpty()) {
throw new IllegalArgumentException("Couldn't find method '"
+ mappedName + "' on " + clazz);
}
// register all matching methods
for (Iterator it = matchingMethods.iterator(); it.hasNext();) {
Method method = (Method) it.next();
String regMethodName = (String) this.nameMap.get(method);
if ((regMethodName == null)
|| (!regMethodName.equals(name)
&& (regMethodName.length() <= name.length()))) {
// no already registered method name, or more specific
// method name specification now -> (re-)register method
if (regMethodName != null) {
logger.debug("Replacing attributes for secure method ["
+ method + "]: current name [" + name
+ "] is more specific than [" + regMethodName + "]");
}
this.nameMap.put(method, name);
addSecureMethod(method, attr);
} else {
logger.debug("Keeping attributes for secure method [" + method
+ "]: current name [" + name
+ "] is not more specific than [" + regMethodName + "]");
}
}
}
protected ConfigAttributeDefinition lookupAttributes(Method method) {
ConfigAttributeDefinition definition = new ConfigAttributeDefinition();
// Add attributes explictly defined for this method invocation
ConfigAttributeDefinition directlyAssigned = (ConfigAttributeDefinition) this.methodMap
.get(method);
merge(definition, directlyAssigned);
// Add attributes explicitly defined for this method invocation's interfaces
Class[] interfaces = method.getDeclaringClass().getInterfaces();
for (int i = 0; i < interfaces.length; i++) {
Class clazz = interfaces[i];
try {
// Look for the method on the current interface
Method interfaceMethod = clazz.getDeclaredMethod(method.getName(),
(Class[]) method.getParameterTypes());
ConfigAttributeDefinition interfaceAssigned = (ConfigAttributeDefinition) this.methodMap
.get(interfaceMethod);
merge(definition, interfaceAssigned);
} catch (Exception e) {
// skip this interface
}
}
// Return null if empty, as per abstract superclass contract
if (definition.size() == 0) {
return null;
} else {
return definition;
}
}
/**
* Return if the given method name matches the mapped name. The default
* implementation checks for "xxx" and "xxx" matches.
*
* @param methodName the method name of the class
* @param mappedName the name in the descriptor
*
* @return if the names match
*/
private boolean isMatch(String methodName, String mappedName) {
return (mappedName.endsWith("*")
&& methodName.startsWith(mappedName.substring(0, mappedName.length()
- 1)))
|| (mappedName.startsWith("*")
&& methodName.endsWith(mappedName.substring(1, mappedName.length())));
}
private void merge(ConfigAttributeDefinition definition,
ConfigAttributeDefinition toMerge) {
if (toMerge == null) {
return;
}
Iterator attribs = toMerge.getConfigAttributes();
while (attribs.hasNext()) {
definition.addConfigAttribute((ConfigAttribute) attribs.next());
}
}
}
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