com.synflow.cx.internal.scheduler.path.Path.java Source code

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Here is the source code for com.synflow.cx.internal.scheduler.path.Path.java

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/*******************************************************************************
 * Copyright (c) 2013-2014 Synflow SAS.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Matthieu Wipliez - initial API and implementation and/or initial documentation
 *******************************************************************************/
package com.synflow.cx.internal.scheduler.path;

import java.util.ArrayDeque;
import java.util.Deque;
import java.util.Iterator;

import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.collect.Iterables;
import com.synflow.cx.cx.Branch;
import com.synflow.cx.cx.CxExpression;
import com.synflow.cx.services.CxPrinter;
import com.synflow.models.node.Node;

/**
 * This class defines a code path as an iterable over StatementCond.
 * 
 * @author Matthieu Wipliez
 * 
 */
public class Path {

    private Deque<Branch> conds;

    private Iterator<Branch> it;

    public Path() {
        conds = new ArrayDeque<>();
    }

    public void add(Node node) {
        Object content = node.getContent();
        if (content instanceof Branch) {
            Branch cond = (Branch) content;
            conds.addFirst(cond);
        }
    }

    /**
     * Returns the next statement cond of this path.
     * 
     * @return a StatementCond
     */
    public Branch getNext() {
        if (it == null) {
            it = conds.iterator();
        }
        return it.next();
    }

    @Override
    public String toString() {
        return Joiner.on(", ").join(Iterables.transform(conds, new Function<Branch, String>() {
            @Override
            public String apply(Branch cond) {
                CxExpression condition = cond.getCondition();
                if (condition == null) {
                    return "(else)";
                } else {
                    return new CxPrinter().toString(condition);
                }
            }
        }));
    }

}