cayenne-server/src/main/java/org/apache/cayenne/configuration/DefaultConfigurationNameMapper.java

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 *  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
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 *
 *    http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.cayenne.configuration;

import org.apache.cayenne.dbimport.ReverseEngineering;
import org.apache.cayenne.map.DataMap;
import org.apache.cayenne.resource.Resource;

/**
 * @since 3.1
 */
public class DefaultConfigurationNameMapper implements ConfigurationNameMapper {

	private static final String CAYENNE_PREFIX = "cayenne-";
	private static final String CAYENNE_SUFFIX = ".xml";

	private static final String DATA_MAP_SUFFIX = ".map.xml";

	private static final String REVERSE_ENGINEERING_SUFFIX = ".xml";

	protected ConfigurationNodeVisitor<String> nameMapper;

	public DefaultConfigurationNameMapper() {
		nameMapper = new NameMapper();
	}

	@Override
	public String configurationLocation(ConfigurationNode node) {
		return node.acceptVisitor(nameMapper);
	}

	@Override
	public String configurationLocation(Class<? extends ConfigurationNode> type, String name) {
		if (DataChannelDescriptor.class.isAssignableFrom(type)) {
			return getDataChannelName(name);
		} else if (DataMap.class.isAssignableFrom(type)) {
			return getDataMapName(name);
		} else if (ReverseEngineering.class.isAssignableFrom(type)) {
			return getReverseEngineeringName(name);
		}

		throw new IllegalArgumentException("Unrecognized configuration type: " + type.getName());
	}

	@Override
	public String configurationNodeName(Class<? extends ConfigurationNode> type, Resource resource) {

		String path = resource.getURL().getPath();
		if (path == null || path.length() == 0) {
			return null;
		}

		int lastSlash = path.lastIndexOf('/');
		if (lastSlash >= 0) {

			if (lastSlash == path.length() - 1) {
				return null;
			}

			path = path.substring(lastSlash + 1);

		}

		if (DataChannelDescriptor.class.isAssignableFrom(type)) {
			if (!path.startsWith(CAYENNE_PREFIX) || !path.endsWith(CAYENNE_SUFFIX)) {
				return null;
			}

			return path.substring(CAYENNE_PREFIX.length(), path.length() - CAYENNE_SUFFIX.length());
		} else if (DataMap.class.isAssignableFrom(type)) {
			if (!path.endsWith(DATA_MAP_SUFFIX)) {
				return null;
			}
			return path.substring(0, path.length() - DATA_MAP_SUFFIX.length());
		}

		throw new IllegalArgumentException("Unrecognized configuration type: " + type.getName());
	}

	protected String getDataChannelName(String name) {
		if (name == null) {
			throw new NullPointerException("Null DataChannelDescriptor name");
		}

		return CAYENNE_PREFIX + name + CAYENNE_SUFFIX;
	}

	protected String getDataMapName(String name) {
		if (name == null) {
			throw new NullPointerException("Null DataMap name");
		}

		return name + DATA_MAP_SUFFIX;
	}

	private String getReverseEngineeringName(String name) {
		if (name == null) {
			throw new NullPointerException("Null Reverse Engineering name");
		}

		return name + REVERSE_ENGINEERING_SUFFIX;
	}

	final class NameMapper extends BaseConfigurationNodeVisitor<String> {

		@Override
		public String visitDataChannelDescriptor(DataChannelDescriptor descriptor) {
			return getDataChannelName(descriptor.getName());
		}

		@Override
		public String visitDataMap(DataMap dataMap) {
			return getDataMapName(dataMap.getName());
		}

		@Override
		public String visitReverseEngineering(ReverseEngineering reverseEngineering) {
			return getReverseEngineeringName(reverseEngineering.getName());
		}
	}
}