org.jboss.as.clustering.controller.SimpleChildResourceProvider Maven / Gradle / Ivy

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The code in this module is not explicitly related to clustering, but rather contains resuable code used by clustering modules and any modules that integrate with clustering.

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/*
 * Copyright The WildFly Authors
 * SPDX-License-Identifier: Apache-2.0
 */

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 children;
    private final Supplier provider;

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

    public SimpleChildResourceProvider(Set children, Supplier 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 getChildren() {
        return this.children;
    }
}