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.reifier; 018 019import java.util.Comparator; 020 021import org.apache.camel.Expression; 022import org.apache.camel.Processor; 023import org.apache.camel.model.ProcessorDefinition; 024import org.apache.camel.model.SortDefinition; 025import org.apache.camel.processor.SortProcessor; 026import org.apache.camel.spi.RouteContext; 027import org.apache.camel.support.ObjectHelper; 028 029import static org.apache.camel.builder.ExpressionBuilder.bodyExpression; 030import static org.apache.camel.util.ObjectHelper.isNotEmpty; 031 032public class SortReifier<T, U extends SortDefinition<T>> extends ExpressionReifier<U> { 033 034 public SortReifier(ProcessorDefinition<?> definition) { 035 super((U)definition); 036 } 037 038 @Override 039 @SuppressWarnings("unchecked") 040 public Processor createProcessor(RouteContext routeContext) throws Exception { 041 // lookup in registry 042 if (isNotEmpty(definition.getComparatorRef())) { 043 definition.setComparator(routeContext.lookup(definition.getComparatorRef(), Comparator.class)); 044 } 045 046 // if no comparator then default on to string representation 047 if (definition.getComparator() == null) { 048 definition.setComparator(new Comparator<T>() { 049 public int compare(T o1, T o2) { 050 return ObjectHelper.compare(o1, o2); 051 } 052 }); 053 } 054 055 // if no expression provided then default to body expression 056 Expression exp; 057 if (definition.getExpression() == null) { 058 exp = bodyExpression(); 059 } else { 060 exp = definition.getExpression().createExpression(routeContext); 061 } 062 return new SortProcessor<T>(exp, definition.getComparator()); 063 } 064 065}