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A JNDI DirContext factory which works very much like a JDBC DataSource returning ready-to-use DirContext objects.
There is a newer version: 2.3.1
package net.sf.michaelo.dirctxsrc.spring;

import java.util.Map;

import javax.naming.NamingException;
import javax.naming.directory.DirContext;

import net.sf.michaelo.dirctxsrc.DirContextSource.Auth;
import net.sf.michaelo.dirctxsrc.DirContextSource.Builder;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.ldap.core.ContextSource;

public class DirContextSource implements ContextSource, InitializingBean {

	private net.sf.michaelo.dirctxsrc.DirContextSource.Builder builder;
	private net.sf.michaelo.dirctxsrc.DirContextSource contextSource;

	/**
	 * A Spring LDAP {@link ContextSource} wrapper for
	 * {@link net.sf.michaelo.dirctxsrc.DirContextSource DirContextSource}.
	 *
	 * 
	 * A minimal example how to create a {@code DirContextSource} with the supplied builder:
	 *
	 * 
	 * <beans:bean class="net.sf.michaelo.dirctxsrc.spring.DirContextSource">
	 *  <beans:constructor-arg>
	 *    <beans:array>
	 *      <beans:value>ldap://hostname</beans:value>
	 *    </beans:array>
	 *  </beans:constructor-arg>
	 * </beans:bean>
	 * 
	 *
	 * 
	 *
	 * 
	 * A {@code DirContextSource} object will be initially preconfigured by its builder for you:
	 * 

	 * The object factory is set by default to
	 * org.springframework.ldap.core.support.DefaultDirObjectFactory.
	 * 
	 * 
	 *
	 * @see net.sf.michaelo.dirctxsrc.DirContextSource
	 */
	public DirContextSource(String... urls) {
		builder = new net.sf.michaelo.dirctxsrc.DirContextSource.Builder(urls);
		builder.objectFactories("org.springframework.ldap.core.support.DefaultDirObjectFactory");
	}

	@Override
	public void afterPropertiesSet() throws Exception {
		contextSource = builder.build();
	}

	@Override
	public DirContext getReadOnlyContext() {
		try {
			return contextSource.getDirContext();
		} catch (NamingException e) {
			throw org.springframework.ldap.support.LdapUtils.convertLdapException(e);
		}
	}

	@Override
	public DirContext getReadWriteContext() {
		try {
			return contextSource.getDirContext();
		} catch (NamingException e) {
			throw org.springframework.ldap.support.LdapUtils.convertLdapException(e);
		}
	}

	@Override
	public DirContext getContext(String principal, String credentials) {
		throw new UnsupportedOperationException(
				"A context can only be created explicitly with a login config name");
	}

	/**
	 * @see Builder#contextFactory(String)
	 */
	public void setContextFactory(String contextFactory) {
		builder.contextFactory(contextFactory);
	}

	/**
	 * @see Builder#auth(Auth)
	 */
	public void setAuth(Auth auth) {
		builder.auth(auth);
	}

	/**
	 * @see Builder#loginEntryName(String)
	 */
	public void setLoginEntryName(String loginEntryName) {
		builder.loginEntryName(loginEntryName);
	}

	/**
	 * @see Builder#debug(boolean)
	 */
	public void setDebug(boolean debug) {
		builder.debug(debug);
	}

	/**
	 * @see Builder#qop(String...)
	 */
	public void setQop(String... qop) {
		builder.qop(qop);
	}

	/**
	 * @see Builder#mutualAuth(boolean)
	 */
	public void setMutualAuth(boolean mutualAuth) {
		builder.mutualAuth(mutualAuth);
	}

	/**
	 * @see Builder#retries(int)
	 */
	public void setRetries(int retries) {
		builder.retries(retries);
	}

	/**
	 * @see Builder#retryWait(int)
	 */
	public void setRetryWait(int retryWait) {
		builder.retryWait(retryWait);
	}

	/**
	 * @see Builder#binaryAttributes(String...)
	 */
	public void setBinaryAttributes(String... binaryAttributes) {
		builder.binaryAttributes(binaryAttributes);
	}

	/**
	 * @see Builder#additionalProperty(String, Object)
	 */
	public void setAdditionalProperties(Map additionalProperties) {
		for (Map.Entry additionalProperty : additionalProperties.entrySet())
			builder.additionalProperty(additionalProperty.getKey(), additionalProperty.getValue());
	}

}