/*******************************************************************************
* Copyright (c) 2012-2017 Codenvy, S.A.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Codenvy, S.A. - initial API and implementation
*******************************************************************************/
package org.eclipse.che.plugin.docker.machine.dns;
import org.eclipse.che.commons.annotation.Nullable;
import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Provider;
import javax.inject.Singleton;
import static com.google.common.base.Strings.isNullOrEmpty;
/**
* Injects DNS resolvers and ensures that it is neither empty array nor single value array with null or empty string.
*
* @author Alexander Garagatyi
*/
@Singleton
public class DnsResolversProvider implements Provider<String[]> {
private final String[] dnsResolvers;
@Inject
public DnsResolversProvider(@Nullable @Named("che.dns.resolvers") String[] dnsResolvers) {
if (dnsResolvers == null ||
dnsResolvers.length == 0 ||
(dnsResolvers.length == 1 && isNullOrEmpty(dnsResolvers[0]))) {
this.dnsResolvers = null;
} else {
this.dnsResolvers = dnsResolvers;
}
}
@Nullable
@Override
public String[] get() {
return dnsResolvers;
}
}