org.graylog.grn.GRNDescriptorService Maven / Gradle / Ivy
/*
* Copyright (C) 2020 Graylog, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* .
*/
package org.graylog.grn;
import javax.inject.Inject;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
/**
* Provides GRN descriptor instances.
*/
public class GRNDescriptorService {
private final Map descriptorProviders;
@Inject
public GRNDescriptorService(Map descriptorProviders) {
this.descriptorProviders = descriptorProviders;
}
/**
* Returns the descriptor instance for the given GRN.
*
* @param grn the GRN
* @return the descriptor instance for the GRN
*/
public GRNDescriptor getDescriptor(GRN grn) {
final GRNDescriptorProvider provider = descriptorProviders.get(grn.grnType());
if (provider == null) {
throw new IllegalStateException("Missing GRN descriptor provider for GRN type: " + grn.type());
}
return provider.get(grn);
}
/**
* Returns descriptors for the given GRN collection.
*
* @param grns collection of GRNs
* @return the descriptors for the given GRNs
*/
public Set getDescriptors(Collection grns) {
return grns.stream().map(this::getDescriptor).collect(Collectors.toSet());
}
}