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The Core Camel Java DSL based router
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/**
 * 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.camel.view;

import java.io.PrintWriter;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.camel.model.FromDefinition;
import org.apache.camel.model.MulticastDefinition;
import org.apache.camel.model.ProcessorDefinition;
import org.apache.camel.model.RouteDefinition;
import static org.apache.camel.util.ObjectHelper.isEmpty;
import static org.apache.camel.util.StringHelper.xmlEncode;

/**
 * @version 
 */
@Deprecated
public class XmlGraphGenerator extends GraphGeneratorSupport {
    private boolean addUrl = true;

    public XmlGraphGenerator(String dir) {
        super(dir, ".xml");
    }

    protected void generateFile(PrintWriter writer, Map> map) {
        writer.println("");
        writer.println("");
        writer.println();

        if (map.size() > 0) {
            writer.println("");
        }
        printRoutes(writer, map);

        writer.println();
        writer.println("");
    }

    protected void printRoutes(PrintWriter writer, Map> map) {
        Set>> entries = map.entrySet();
        for (Map.Entry> entry : entries) {
            String group = entry.getKey();
            printRoutes(writer, group, entry.getValue());
        }
    }

    protected void printRoutes(PrintWriter writer, String group, List routes) {
        group = xmlEncode(group);
        if (group != null) {
            int idx = group.lastIndexOf('.');
            String name = group;
            if (idx > 0 && idx < group.length() - 1) {
                name = group.substring(idx + 1);
            }
            writer.println("");
            writer.println("");
        }
        for (RouteDefinition route : routes) {
            List inputs = route.getInputs();
            boolean first = true;
            for (FromDefinition input : inputs) {
                NodeData nodeData = getNodeData(input);
                if (first) {
                    first = false;
                    if (group != null) {
                        writer.println("");
                    }
                }
                printRoute(writer, route, nodeData);
            }
            writer.println();
        }
    }

    protected void printRoute(PrintWriter writer, final RouteDefinition route, NodeData nodeData) {
        printNode(writer, nodeData);

        NodeData from = nodeData;
        for (ProcessorDefinition output : route.getOutputs()) {
            NodeData newData = printNode(writer, from, output);
            from = newData;
        }
    }

    protected NodeData printNode(PrintWriter writer, NodeData fromData, ProcessorDefinition node) {
        if (node instanceof MulticastDefinition) {
            // no need for a multicast node
            List> outputs = node.getOutputs();
            for (ProcessorDefinition output : outputs) {
                printNode(writer, fromData, output);
            }
            return fromData;
        }
        NodeData toData = getNodeData(node);

        printNode(writer, toData);

        if (fromData != null) {
            writer.print("");
        }

        // now lets write any children
        List> outputs = toData.outputs;
        if (outputs != null) {
            for (ProcessorDefinition output : outputs) {
                NodeData newData = printNode(writer, toData, output);
                if (!isMulticastNode(node)) {
                    toData = newData;
                }
            }
        }
        return toData;
    }

    protected void printNode(PrintWriter writer, NodeData data) {
        if (!data.nodeWritten) {
            data.nodeWritten = true;

            writer.println();
            writer.print("");
        }
    }

}