001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.support;
018
019import org.apache.camel.Exchange;
020import org.apache.camel.NoTypeConversionAvailableException;
021import org.apache.camel.TypeConversionException;
022import org.apache.camel.TypeConverter;
023
024/**
025 * Base class for {@link TypeConverter} implementations.
026 * <p/>
027 * Implementators need only to implement the {@link TypeConverter#convertTo(Class, org.apache.camel.Exchange, Object)}
028 * method, and can rely on the default implementations of the other methods from this support class.
029 */
030public abstract class TypeConverterSupport implements TypeConverter {
031
032    @Override
033    public boolean allowNull() {
034        return false;
035    }
036
037    @Override
038    public <T> T convertTo(Class<T> type, Object value) throws TypeConversionException {
039        return convertTo(type, null, value);
040    }
041
042    @Override
043    public <T> T mandatoryConvertTo(Class<T> type, Object value) throws TypeConversionException, NoTypeConversionAvailableException {
044        T t = convertTo(type, null, value);
045        if (t == null) {
046            throw new NoTypeConversionAvailableException(value, type);
047        } else {
048            return t;
049        }
050    }
051
052    @Override
053    public <T> T mandatoryConvertTo(Class<T> type, Exchange exchange, Object value) throws TypeConversionException, NoTypeConversionAvailableException {
054        T t = convertTo(type, exchange, value);
055        if (t == null) {
056            throw new NoTypeConversionAvailableException(value, type);
057        } else {
058            return t;
059        }
060    }
061
062    @Override
063    public <T> T tryConvertTo(Class<T> type, Object value) {
064        try {
065            return convertTo(type, null, value);
066        } catch (Exception e) {
067            // ignore
068        }
069        return null;
070    }
071
072    @Override
073    public <T> T tryConvertTo(Class<T> type, Exchange exchange, Object value) {
074        try {
075            return convertTo(type, exchange, value);
076        } catch (Exception e) {
077            // ignore
078        }
079        return null;
080    }
081}