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.impl.transformer; 018 019import org.apache.camel.impl.DefaultCamelContext; 020import org.apache.camel.spi.DataType; 021import org.apache.camel.util.StringHelper; 022import org.apache.camel.util.ValueHolder; 023 024/** 025 * Key used in {@link org.apache.camel.spi.TransformerRegistry} in {@link DefaultCamelContext}, 026 * to ensure a consistent lookup. 027 */ 028public final class TransformerKey extends ValueHolder<String> { 029 030 private String scheme; 031 private DataType from; 032 private DataType to; 033 034 public TransformerKey(String scheme) { 035 super(scheme); 036 StringHelper.notEmpty(scheme, "scheme"); 037 this.scheme = scheme; 038 } 039 040 public TransformerKey(DataType from, DataType to) { 041 super(createKeyString(from, to)); 042 this.from = from; 043 this.to = to; 044 } 045 046 private static String createKeyString(DataType from, DataType to) { 047 return from + "/" + to; 048 } 049 050 public String getScheme() { 051 return scheme; 052 } 053 054 public DataType getFrom() { 055 return from; 056 } 057 058 public DataType getTo() { 059 return to; 060 } 061 062 @Override 063 public String toString() { 064 return get(); 065 } 066 067}