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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 com.agfa.hap.sdo.impl;
import java.io.Serializable;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import com.agfa.hap.sdo.Type;
/**
* Class that provides
* an implementation to convert instances from and to a string. This is typically
* used in sdo xml conversions and snapshots.
* <P>
* A custom sdo basic type can register an appropriate typeConverter.
*/
public abstract class TypeConverter<T> {
/**
* Parse the string and return an instance of the implementation class
* with a value that is represented by the string parameter.
*/
public abstract T parse(String str);
/**
* Convert the instance to a string. The instance is guaranteed to be of type
* T.
*/
public abstract String toString(T instance);
/**
* @return The type converter instance registered with that name or null if nothing
* is found.
*/
@SuppressWarnings("unchecked")
public static <U> TypeConverter<U> get(Type type) {
return registry.get(type);
}
public static void register(Type type, TypeConverter converter) {
registry.put(type, converter);
}
/**
* Returns the default TypeConverter for the given clazz. Checks for Enums
* and classes that implement {@link Serializable}.
*/
public static <T> TypeConverter<T> getDefaultConverter(Class<T> clazz) {
if (clazz.isEnum()) {
return new EnumTypeConverter(clazz);
}
if (Serializable.class.isAssignableFrom(clazz)) {
return (TypeConverter<T>) new SerializableTypeConverter();
}
return null;
}
private static Map<Type, TypeConverter> registry = new ConcurrentHashMap<Type, TypeConverter>();
}
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