cayenne-project/src/main/java/org/apache/cayenne/project/ConfigurationSaver.java

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 *  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
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 *    https://www.apache.org/licenses/LICENSE-2.0
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package org.apache.cayenne.project;

import java.io.PrintWriter;

import org.apache.cayenne.configuration.BaseConfigurationNodeVisitor;
import org.apache.cayenne.configuration.DataChannelDescriptor;
import org.apache.cayenne.map.DataMap;
import org.apache.cayenne.project.extension.SaverDelegate;
import org.apache.cayenne.util.XMLEncoder;
import org.apache.cayenne.util.XMLSerializable;

/**
 * @since 3.1
 */
class ConfigurationSaver extends BaseConfigurationNodeVisitor<Void> {

    private PrintWriter printWriter;
    private String version;
    private SaverDelegate delegate;

    ConfigurationSaver(PrintWriter printWriter, String version, SaverDelegate delegate) {
        this.printWriter = printWriter;
        this.version = version;
        this.delegate = delegate;
    }

    @Override
    public Void visitDataChannelDescriptor(DataChannelDescriptor node) {
        encodeNode(node);
        return null;
    }

    @Override
    public Void visitDataMap(DataMap node) {
        encodeNode(node);
        return null;
    }

    private void encodeNode(XMLSerializable node) {
        XMLEncoder encoder = new XMLEncoder(printWriter, "\t", version);
        encoder.println("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
        delegate.setXMLEncoder(encoder);
        node.encodeAsXML(encoder, delegate);
    }
}