org.springframework.ldap.odm.typeconversion.impl.ConversionServiceConverterManager Maven / Gradle / Ivy

/*
 * Copyright 2005-2013 the original author or authors.
 *
 * Licensed 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
 *
 *      https://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.springframework.ldap.odm.typeconversion.impl;

import org.springframework.core.convert.support.GenericConversionService;
import org.springframework.ldap.odm.typeconversion.ConverterManager;
import org.springframework.ldap.support.LdapUtils;
import org.springframework.util.ClassUtils;
import org.springframework.util.ReflectionUtils;

import javax.naming.Name;

/**
 * @author Mattias Hellborg Arthursson
 * @since 2.0
 */
public class ConversionServiceConverterManager implements ConverterManager {
	private GenericConversionService conversionService;
	private static final String DEFAULT_CONVERSION_SERVICE_CLASS =
			"org.springframework.core.convert.support.DefaultConversionService";

	public ConversionServiceConverterManager(GenericConversionService conversionService) {
		this.conversionService = conversionService;
	}

	public ConversionServiceConverterManager() {
		ClassLoader defaultClassLoader = ClassUtils.getDefaultClassLoader();
		if(ClassUtils.isPresent(DEFAULT_CONVERSION_SERVICE_CLASS, defaultClassLoader)) {
			try {
				Class clazz = ClassUtils.forName(DEFAULT_CONVERSION_SERVICE_CLASS, defaultClassLoader);
				conversionService = (GenericConversionService) clazz.newInstance();
			} catch (Exception e) {
				ReflectionUtils.handleReflectionException(e);
			}
		} else {
			conversionService = new GenericConversionService();
		}

		prePopulateWithNameConverter();
	}

	private void prePopulateWithNameConverter() {
		conversionService.addConverter(new StringToNameConverter());
	}

	@Override
	public boolean canConvert(Class fromClass, String syntax, Class toClass) {
		return conversionService.canConvert(fromClass, toClass);
	}

	@Override
	public  T convert(Object source, String syntax, Class toClass) {
		return conversionService.convert(source, toClass);
	}

	public final static class NameToStringConverter
			implements org.springframework.core.convert.converter.Converter {
		@Override
		public String convert(Name source) {
			if(source == null) {
				return null;
			}

			return source.toString();
		}
	}

	public static final class StringToNameConverter
			implements org.springframework.core.convert.converter.Converter {

		@Override
		public Name convert(String source) {
			if(source == null) {
				return null;
			}

			return LdapUtils.newLdapName(source);
		}
	}

}