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Cayenne Object Persistence Framework
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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.
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package org.apache.cayenne.conf;

import java.io.PrintWriter;
import java.util.Iterator;

import org.apache.cayenne.conn.DataSourceInfo;
import org.apache.cayenne.project.Project;
import org.apache.cayenne.util.Util;

/**
 * Class that does saving of Cayenne configuration.
 * 
 * @author Andrei Adamchik
 */
public class ConfigSaver {
    protected ConfigSaverDelegate delegate;

    /**
     * Constructor for ConfigSaver.
     */
    public ConfigSaver() {
        super();
    }

    /**
       * Constructor for ConfigSaver.
       */
    public ConfigSaver(ConfigSaverDelegate delegate) {
        this.delegate = delegate;
    }

    /** 
     * Saves domains into the specified file. Assumes that the maps have already
     * been saved.
     */
    public void storeDomains(PrintWriter pw) {
        pw.println("");
        pw.println("");

        Iterator it = delegate.domainNames();
        while (it.hasNext()) {
            storeDomain(pw, (String) it.next());
        }

        Iterator views = delegate.viewNames();
        while (views.hasNext()) {
            storeDataView(pw, (String) views.next());
        }
        pw.println("");
    }

    protected void storeDataView(PrintWriter pw, String dataViewName) {
        String location = delegate.viewLocation(dataViewName);
        pw.print("");
    }

    protected void storeDomain(PrintWriter pw, String domainName) {
        pw.println("");

        // store properties
        Iterator properties = delegate.propertyNames(domainName);
        boolean breakNeeded = properties.hasNext();
        while (properties.hasNext()) {
            String name = (String) properties.next();
            if (name == null) {
                continue;
            }

            String value = delegate.propertyValue(domainName, name);
            if (value == null) {
                continue;
            }

            pw.print("\t");
        }

        // store maps
        Iterator maps = delegate.mapNames(domainName);
        if (maps.hasNext()) {
            if (breakNeeded) {
                pw.println();
            }

            breakNeeded = true;
        }

        while (maps.hasNext()) {
            String mapName = (String) maps.next();
            String mapLocation = delegate.mapLocation(domainName, mapName);

            pw.print("\t");
        }

        // store nodes
        Iterator nodes = delegate.nodeNames(domainName);
        if (nodes.hasNext() && breakNeeded) {
            pw.println();
        }
        while (nodes.hasNext()) {
            String nodeName = (String) nodes.next();
            String datasource = delegate.nodeDataSourceName(domainName, nodeName);
            String adapter = delegate.nodeAdapterName(domainName, nodeName);
            String factory = delegate.nodeFactoryName(domainName, nodeName);
            Iterator mapNames = delegate.linkedMapNames(domainName, nodeName);

            pw.println("\t");

            while (mapNames.hasNext()) {
                String mapName = (String) mapNames.next();
                pw.println("\t\t\t");
            }
            pw.println("\t ");
        }
        pw.println("");
    }

    /**
     * Stores DataSolurceInfo to the specified PrintWriter.
     * info object may contain full or partial information.
     */
    public void storeDataNode(PrintWriter out, DataSourceInfo info) {
        out.println("");
        out.print("");

        if (info.getDataSourceUrl() != null) {
            String encoded = Util.encodeXmlAttribute(info.getDataSourceUrl());
            out.println("\t");
        }

        out.println(
            "\t");

        if (info.getUserName() != null || info.getPassword() != null) {
            out.print("\t");
        }

        out.println("");
    }
}