axiom-weaver/src/main/java/org/apache/axiom/weaver/InterfaceNode.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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 org.apache.axiom.weaver;

import java.util.Set;

import com.github.veithen.jrel.association.ManyToManyAssociation;
import com.github.veithen.jrel.association.MutableReferences;
import com.github.veithen.jrel.association.Navigability;

final class InterfaceNode {
    private static final ManyToManyAssociation<InterfaceNode, InterfaceNode> EXTENDS =
            new ManyToManyAssociation<>(
                    InterfaceNode.class, InterfaceNode.class, Navigability.UNIDIRECTIONAL);

    private final Class<?> iface;
    private final MutableReferences<InterfaceNode> parents = EXTENDS.newReferenceHolder(this);
    private final boolean singleton;
    private final MutableReferences<ImplementationNode> implementations =
            Relations.IMPLEMENTS.getConverse().newReferenceHolder(this);

    InterfaceNode(Class<?> iface, Set<InterfaceNode> parents, boolean singleton) {
        this.iface = iface;
        this.parents.addAll(parents);
        this.singleton = singleton;
    }

    Class<?> getInterface() {
        return iface;
    }

    Set<InterfaceNode> getParents() {
        return parents.asSet();
    }

    boolean isSingleton() {
        return singleton;
    }

    Set<ImplementationNode> getImplementations() {
        return implementations.asSet();
    }
}