com.google.inject.jndi.JndiIntegration Maven / Gradle / Ivy
/*
* Copyright (C) 2006 Google Inc.
*
* 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 com.google.inject.jndi;
import com.google.inject.Inject;
import com.google.inject.Provider;
import javax.naming.Context;
import javax.naming.NamingException;
/**
* Integrates Guice with JNDI. Requires a binding to {@link javax.naming.Context}.
*
* @author [email protected] (Bob Lee)
*/
public class JndiIntegration {
private JndiIntegration() {}
/**
* Creates a provider which looks up objects in JNDI using the given name. Example usage:
*
*
* bind(DataSource.class).toProvider(fromJndi(DataSource.class, "java:..."));
*
*/
public static Provider fromJndi(Class type, String name) {
return new JndiProvider(type, name);
}
static class JndiProvider implements Provider {
@Inject Context context;
final Class type;
final String name;
public JndiProvider(Class type, String name) {
this.type = type;
this.name = name;
}
@Override
public T get() {
try {
return type.cast(context.lookup(name));
} catch (NamingException e) {
throw new RuntimeException(e);
}
}
}
}