org.springframework.ldap.control
Class AbstractFallbackRequestAndResponseControlDirContextProcessor

java.lang.Object
  org.springframework.ldap.control.AbstractRequestControlDirContextProcessor
      org.springframework.ldap.control.AbstractFallbackRequestAndResponseControlDirContextProcessor

All Implemented Interfaces:

DirContextProcessor

Direct Known Subclasses:

PagedResultsDirContextProcessor, SortControlDirContextProcessor

public abstract class AbstractFallbackRequestAndResponseControlDirContextProcessor
extends AbstractRequestControlDirContextProcessor

Convenient base class useful when implementing a standard DirContextProcessor which has a request control and a response control. It handles the loading of the control classes, using fallback implementations specified by the subclass if necessary. It handles the request control constructor invocation; it only needs the constructor arguments to be provided. It also handles most of the work in the post processing of the response control, only delegating to a template method for the actual value retrieval. In short, it makes it easy to implement a custom DirContextProcessor.

 public class SortControlDirContextProcessor extends AbstractFallbackRequestAndResponseControlDirContextProcessor {
        String sortKey;
 
        private boolean sorted = false;
 
        private int resultCode = -1;
 
        public SortControlDirContextProcessor(String sortKey) {
                this.sortKey = sortKey;
 
                defaultRequestControl = "javax.naming.ldap.SortControl";
                defaultResponseControl = "com.sun.jndi.ldap.ctl.SortControl";
                fallbackRequestControl = "javax.naming.ldap.SortResponseControl";
                fallbackResponseControl = "com.sun.jndi.ldap.ctl.SortResponseControl";
 
                loadControlClasses();
        }
 
        public boolean isSorted() {
                return sorted;
        }
 
        public int getResultCode() {
                return resultCode;
        }
 
        public Control createRequestControl() {
                return super.createRequestControl(new Class[] { String[].class, boolean.class }, new Object[] {
                                new String[] { sortKey }, Boolean.valueOf(critical) });
        }
 
        protected void handleResponse(Object control) {
                Boolean result = (Boolean) invokeMethod("isSorted", responseControlClass, control);
                this.sorted = result.booleanValue();
                Integer code = (Integer) invokeMethod("getResultCode", responseControlClass, control);
                resultCode = code.intValue();
        }
 }
 

Author:

Ulrik Sandberg

Field Summary

protected boolean	critical
protected String	defaultRequestControl
protected String	defaultResponseControl
protected String	fallbackRequestControl
protected String	fallbackResponseControl
protected Class<?>	requestControlClass
protected Class<?>	responseControlClass

Fields inherited from class org.springframework.ldap.control.AbstractRequestControlDirContextProcessor

log

Constructor Summary

AbstractFallbackRequestAndResponseControlDirContextProcessor()

Method Summary

Control	createRequestControl(Class<?>[] paramTypes, Object[] params) Creates a request control using the constructor parameters given in params.
protected abstract void	handleResponse(Object control)
protected Object	invokeMethod(String method, Class<?> clazz, Object control) Utility method for invoking a method on a Control.
protected void	loadControlClasses()
void	postProcess(DirContext ctx) Perform post-processing on the supplied DirContext.
void	setCritical(boolean critical) Set whether this control should be indicated as critical.
void	setRequestControlClass(Class<?> requestControlClass)
void	setResponseControlClass(Class<?> responseControlClass) Set the class of the expected ResponseControl for the sorted result response.

Methods inherited from class org.springframework.ldap.control.AbstractRequestControlDirContextProcessor

createRequestControl, isReplaceSameControlEnabled, preProcess, setReplaceSameControlEnabled

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

responseControlClass

protected Class<?> responseControlClass

requestControlClass

protected Class<?> requestControlClass

critical

protected boolean critical

defaultRequestControl

protected String defaultRequestControl

defaultResponseControl

protected String defaultResponseControl

fallbackRequestControl

protected String fallbackRequestControl

fallbackResponseControl

protected String fallbackResponseControl

Constructor Detail

AbstractFallbackRequestAndResponseControlDirContextProcessor

public AbstractFallbackRequestAndResponseControlDirContextProcessor()

Method Detail

loadControlClasses

protected void loadControlClasses()

setResponseControlClass

public void setResponseControlClass(Class<?> responseControlClass)

Set the class of the expected ResponseControl for the sorted result response.

Parameters:

responseControlClass - Class of the expected response control.

setRequestControlClass

public void setRequestControlClass(Class<?> requestControlClass)

invokeMethod

protected Object invokeMethod(String method,
                              Class<?> clazz,
                              Object control)

Utility method for invoking a method on a Control.

Parameters:

method - name of method to invoke

clazz - Class of the object that the method should be invoked on

control - Instance that the method should be invoked on

Returns:

the invocation result, if any

createRequestControl

public Control createRequestControl(Class<?>[] paramTypes,
                                    Object[] params)

Creates a request control using the constructor parameters given in params.

Parameters:

paramTypes - Types of the constructor parameters

params - Actual constructor parameters

Returns:

Control to be used by the DirContextProcessor

postProcess

public void postProcess(DirContext ctx)
                 throws NamingException

Description copied from interface: DirContextProcessor

Perform post-processing on the supplied DirContext.

Parameters:

ctx - the DirContext instance.

Throws:

NamingException - if thrown by the underlying operation.

setCritical

public void setCritical(boolean critical)

Set whether this control should be indicated as critical.

Parameters:

critical - whether the control is critical.

Since:

2.0

handleResponse

protected abstract void handleResponse(Object control)