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package org.apache.tuscany.das.ldap.util;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
/**
* The Class JNDIUtil.
*/
public class JNDIUtil
{
/**
* Calculate DN components.
*
* @param context the context
*
* @return the string[] containing the components of the DN
*
* @throws NamingException the naming exception
*/
public static String[] calculateDNComponents(
DirContext context)
throws NamingException
{
String contextDN =
context.getNameInNamespace();
String[] initialContextComponents =
contextDN.split( "[,]" );
return initialContextComponents;
}
/**
* Calculate DN components.
*
* @param contextDN the context DN
*
* @return the string[] containing the components of the DN
*
* @throws NamingException the naming exception
*/
public static String[] calculateDNComponents(
String contextDN)
throws NamingException
{
String[] initialContextComponents =
contextDN.split( "[,]" );
return initialContextComponents;
}
/**
* Gets the parent context.
*
* @param partitionContext the partition context
* @param childContext the child context
*
* @return the parent context (Null if the child context is the root)
*
* @throws NamingException the naming exception
*/
public static DirContext getParentContext(
DirContext childContext,
DirContext partitionContext)
throws NamingException
{
String[] childContextDNComponents =
calculateDNComponents( childContext );
String[] partitionDNComponents =
calculateDNComponents( partitionContext );
DirContext parentContext = null;
if (childContextDNComponents.length == partitionDNComponents.length)
{
return null;
}
else if ( (childContextDNComponents.length - 1) == partitionDNComponents.length)
{
return partitionContext;
}
else
{
String parentLookupDN =
calculateParentRelativeDN(
childContext, partitionContext.getNameInNamespace() );
parentContext =
( DirContext ) partitionContext.lookup( parentLookupDN );
}
return parentContext;
}
/**
* Calculate parent relative DN.
* The parent relative DN is the
* DN of the parent context, relative
* to the partition context.
*
* So if the partition context is
* <i>ou=system</i> and
* the child context has DN
* <i>cn=accounts, cn=users, cn=example, ou=system</i>
*
* then the parent relative DN is
* <i>cn=users, cn=example</i>
*
* @param childContext the child context
* @param partitionDN the partition DN
*
* @return the string
*
* @throws NamingException the naming exception
*/
public static String calculateParentRelativeDN(
DirContext childContext,
String partitionDN)
throws NamingException
{
String parentRelativeDN = null;
String[] childContextDNComponents =
calculateDNComponents( childContext );
String[] partitionDNComponents =
calculateDNComponents( partitionDN );
if (childContextDNComponents.length ==
partitionDNComponents.length)
{
return null;
}
else if (childContextDNComponents.length ==
partitionDNComponents.length + 1)
{
String childRDN = childContextDNComponents[0];
String childContextDN = childContext.getNameInNamespace();
int beginIndex = childRDN.length() + 1;
int endIndex = childContextDN.length();
parentRelativeDN = childContextDN.substring(
beginIndex, endIndex );
return parentRelativeDN;
}
else
{
String childRDN = childContextDNComponents[0];
String childContextDN = childContext.getNameInNamespace();
int beginIndex = childRDN.length() + 1;
int endIndex =
childContextDN.length() -
( partitionDN.length() +1);
parentRelativeDN = childContextDN.substring(
beginIndex, endIndex );
}
return parentRelativeDN;
}
}
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