/*
 * Copyright 2008 the original author or authors.
 * 
 * Licensed 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.wamblee.system.graph.component;

import java.util.List;

import org.wamblee.system.container.InterfaceRestriction;
import org.wamblee.system.core.Component;
import org.wamblee.system.graph.Edge;
import org.wamblee.system.graph.Graph;
import org.wamblee.system.graph.Node;
import org.wamblee.system.graph.Visitor;

public class ApplyRestrictionsVisitor implements Visitor {
    
    private Graph _graph; 
    private InterfaceRestriction _restriction; 
    
    public ApplyRestrictionsVisitor(Graph aGraph, InterfaceRestriction aRestriction) { 
        _graph = aGraph; 
        _restriction = aRestriction;
    }

    @Override
    public void visitEdge(Edge aEdge) {
        if ( aEdge.getFrom() instanceof RequiredInterfaceNode &&
             aEdge.getTo() instanceof ProvidedInterfaceNode) {
            RequiredInterfaceNode from = (RequiredInterfaceNode)aEdge.getFrom(); 
            ProvidedInterfaceNode to = (ProvidedInterfaceNode) aEdge.getTo();
       
            if ( _restriction.isViolated(from.getComponent(), from.getRequired(), to.getComponent(), to.getProvided())) { 
                _graph.removeEdge(aEdge);
            }
        }
    }

    @Override
    public void visitNode(Node aNode) {
        // Empty
    }

}