Mega Code Archive
How to perform a search and limit the number of results returned
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import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.SizeLimitExceededException;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;
/**
* Demonstrates how to perform a search and limit the number of results
* returned.
*
* usage: java SearchCountLimit
*/
class SearchCountLimit {
static int expected = 1;
public static void printSearchEnumeration(NamingEnumeration srhEnum) {
int count = 0;
try {
while (srhEnum.hasMore()) {
SearchResult sr = (SearchResult) srhEnum.next();
System.out.println(">>>" + sr.getName());
++count;
}
System.out.println("number of answers: " + count);
} catch (SizeLimitExceededException e) {
if (count == expected)
System.out.println("number of answers: " + count);
else
e.printStackTrace();
} catch (NamingException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
// Set up the environment for creating the initial context
Hashtable<String, Object> env = new Hashtable<String, Object>(11);
env
.put(Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://localhost:389/o=JNDITutorial");
try {
// Create initial context
DirContext ctx = new InitialDirContext(env);
// Set search controls to limit count to 'expected'
SearchControls ctls = new SearchControls();
ctls.setCountLimit(expected);
// Search for objects with those matching attributes
NamingEnumeration answer = ctx.search("ou=People", "(sn=M*)", ctls);
// Print the answer
printSearchEnumeration(answer);
// Close the context when we're done
ctx.close();
} catch (Exception e) {
System.err.println(e);
}
}
}
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