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.blueprint; 018 019import java.util.Collections; 020import java.util.List; 021import java.util.Properties; 022 023import org.apache.camel.CamelContext; 024import org.apache.camel.component.properties.PropertiesLocation; 025import org.apache.camel.component.properties.PropertiesResolver; 026 027/** 028 * A {@link PropertiesResolver} which supports the <tt>blueprint</tt> scheme. 029 * <p/> 030 * This implementation will sit on top of any existing configured 031 * {@link org.apache.camel.component.properties.PropertiesResolver} and will delegate 032 * to any non <tt>blueprint</tt> schemes. 033 */ 034public class BlueprintPropertiesResolver implements PropertiesResolver { 035 036 private final PropertiesResolver delegate; 037 private final BlueprintPropertiesParser blueprint; 038 039 public BlueprintPropertiesResolver(PropertiesResolver delegate, BlueprintPropertiesParser blueprint) { 040 this.delegate = delegate; 041 this.blueprint = blueprint; 042 } 043 044 @Override 045 public Properties resolveProperties(CamelContext context, boolean ignoreMissingLocation, List<PropertiesLocation> locations) throws Exception { 046 Properties answer = new Properties(); 047 048 boolean explicit = false; 049 050 for (PropertiesLocation location : locations) { 051 if ("blueprint".equals(location.getResolver())) { 052 blueprint.addPropertyPlaceholder(location.getPath()); 053 // indicate an explicit blueprint id was configured 054 explicit = true; 055 } else { 056 // delegate the url 057 answer.putAll(delegate.resolveProperties(context, ignoreMissingLocation, Collections.singletonList(location))); 058 } 059 } 060 061 if (!explicit) { 062 // auto lookup blueprint property placeholders to use if none explicit was configured 063 // this is convention over configuration 064 for (String id : blueprint.lookupPropertyPlaceholderIds()) { 065 blueprint.addPropertyPlaceholder(id); 066 } 067 } 068 069 return answer; 070 } 071 072}