/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2019, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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 GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jboss.as.clustering.controller;

import java.util.Set;
import java.util.function.Supplier;

import org.jboss.as.controller.registry.PlaceholderResource;
import org.jboss.as.controller.registry.Resource;
import org.wildfly.common.function.Functions;

/**
 * A simple {@link ChildResourceProvider} containing a predefined set of children.
 * @author Paul Ferraro
 */
public class SimpleChildResourceProvider implements ChildResourceProvider {

    private final Set<String> children;
    private final Supplier<Resource> provider;

    public SimpleChildResourceProvider(Set<String> children) {
        this(children, Functions.constantSupplier(PlaceholderResource.INSTANCE));
    }

    public SimpleChildResourceProvider(Set<String> children, Supplier<Resource> provider) {
        this.children = children;
        this.provider = provider;
    }

    @Override
    public Resource getChild(String name) {
        return this.children.contains(name) ? this.provider.get() : null;
    }

    @Override
    public Set<String> getChildren() {
        return this.children;
    }
}
