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;
018
019/**
020 * An exception caused when a mandatory property is not available on a message
021 * {@link Exchange}
022 * 
023 * @see org.apache.camel.support.ExchangeHelper#getMandatoryProperty(Exchange, String, Class)
024 * 
025 */
026public class NoSuchPropertyException extends CamelExchangeException {
027
028    private final String propertyName;
029    private final transient Class<?> type;
030
031    public NoSuchPropertyException(Exchange exchange, String propertyName, Class<?> type) {
032        super("No '" + propertyName + "' property available of type: " + type.getName()
033              + reason(exchange, propertyName), exchange);
034        this.propertyName = propertyName;
035        this.type = type;
036    }
037
038    public String getPropertyName() {
039        return propertyName;
040    }
041
042    public Class<?> getType() {
043        return type;
044    }
045
046    protected static String reason(Exchange exchange, String propertyName) {
047        Object value = exchange.getProperty(propertyName);
048        return valueDescription(value);
049    }
050
051    static String valueDescription(Object value) {
052        if (value == null) {
053            return "";
054        }
055        return " but has value: " + value + " of type: " + value.getClass().getCanonicalName();
056    }
057}