LinkMinimizer.java

/*
 *  Copyright (c) 2001-2024, Jean Tessier
 *  All rights reserved.
 *  
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *  
 *      * Redistributions of source code must retain the above copyright
 *        notice, this list of conditions and the following disclaimer.
 *  
 *      * Redistributions in binary form must reproduce the above copyright
 *        notice, this list of conditions and the following disclaimer in the
 *        documentation and/or other materials provided with the distribution.
 *  
 *      * Neither the name of Jean Tessier nor the names of his contributors
 *        may be used to endorse or promote products derived from this software
 *        without specific prior written permission.
 *  
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *  A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR
 *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 *  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.jeantessier.dependency;

public class LinkMinimizer extends VisitorBase {
    public LinkMinimizer() {
        super(new DependencySkippingTraversalStrategy(getDefaultStrategy()));
    }

    public LinkMinimizer(TraversalStrategy strategy) {
        super(new DependencySkippingTraversalStrategy(strategy));
    }

    protected void postprocessPackageNode(PackageNode node) {
        traverseOutbound(node.getOutboundDependencies());

        super.postprocessPackageNode(node);
    }
    
    protected void postprocessClassNode(ClassNode node) {
        getStrategy().order(node.getOutboundDependencies()).forEach(target -> {
            node.getPackageNode().removeDependency(target);

            target.acceptOutbound(this);

            pushNode(node.getPackageNode());
            target.acceptOutbound(this);
            popNode();
        });

        super.postprocessClassNode(node);
    }

    public void visitOutboundClassNode(ClassNode node) {
        getCurrentNode().removeDependency(node.getPackageNode());
    }
    
    protected void postprocessFeatureNode(FeatureNode node) {
        getStrategy().order(node.getOutboundDependencies()).forEach(target -> {
            node.getClassNode().removeDependency(target);
            node.getClassNode().getPackageNode().removeDependency(target);

            target.acceptOutbound(this);

            pushNode(node.getClassNode());
            target.acceptOutbound(this);
            popNode();

            pushNode(node.getClassNode().getPackageNode());
            target.acceptOutbound(this);
            popNode();
        });

        super.postprocessFeatureNode(node);
    }

    public void visitOutboundFeatureNode(FeatureNode node) {
        getCurrentNode().removeDependency(node.getClassNode());
        getCurrentNode().removeDependency(node.getClassNode().getPackageNode());
    }
}