| 1 | // Copyright 2004-2007 Jean-Francois Poilpret |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package net.sourceforge.hiveutils.service.impl; |
| 16 | |
| 17 | import java.util.Iterator; |
| 18 | import java.util.List; |
| 19 | import java.util.Map; |
| 20 | import java.util.StringTokenizer; |
| 21 | |
| 22 | import org.apache.hivemind.ApplicationRuntimeException; |
| 23 | import org.apache.hivemind.HiveMind; |
| 24 | import org.apache.hivemind.Location; |
| 25 | import org.apache.hivemind.internal.Module; |
| 26 | import org.apache.hivemind.service.ObjectProvider; |
| 27 | import org.apache.hivemind.util.PropertyUtils; |
| 28 | |
| 29 | /** |
| 30 | * An <code>org.apache.hivemind.service.ObjectProvider</code> |
| 31 | * that extracts a contribution item from a global configuration, referenced by |
| 32 | * a unique id. The translator string is of the form: |
| 33 | * <code>config-id:id-property:id-value</code>. The id-property name defines |
| 34 | * the name of a property of the contribution object that is supposed unique and |
| 35 | * will be used to find the required contribution. |
| 36 | * |
| 37 | * @author Jean-Francois Poilpret |
| 38 | */ |
| 39 | public class ContributionObjectProvider implements ObjectProvider |
| 40 | { |
| 41 | public Object provideObject(Module contributingModule, |
| 42 | Class propertyType, |
| 43 | String inputValue, |
| 44 | Location location) |
| 45 | { |
| 46 | if (HiveMind.isBlank(inputValue)) |
| 47 | { |
| 48 | return null; |
| 49 | } |
| 50 | StringTokenizer tokenizer = new StringTokenizer(inputValue, ":"); |
| 51 | |
| 52 | if (tokenizer.countTokens() == NUM_TOKENS_CFG_PROP_ID) |
| 53 | { |
| 54 | String idConfig = tokenizer.nextToken(); |
| 55 | String property = tokenizer.nextToken(); |
| 56 | String id = tokenizer.nextToken(); |
| 57 | List config = contributingModule.getConfiguration(idConfig); |
| 58 | Iterator i = config.iterator(); |
| 59 | while (i.hasNext()) |
| 60 | { |
| 61 | Object contrib = i.next(); |
| 62 | if (id.equals(PropertyUtils.read(contrib, property))) |
| 63 | { |
| 64 | return contrib; |
| 65 | } |
| 66 | } |
| 67 | return null; |
| 68 | } |
| 69 | else if (tokenizer.countTokens() == NUM_TOKENS_CFG_ID) |
| 70 | { |
| 71 | String idConfig = tokenizer.nextToken(); |
| 72 | String id = tokenizer.nextToken(); |
| 73 | if (contributingModule.isConfigurationMappable(idConfig)) |
| 74 | { |
| 75 | Map config = contributingModule.getConfigurationAsMap(idConfig); |
| 76 | return config.get(id); |
| 77 | } |
| 78 | } |
| 79 | throw new ApplicationRuntimeException( |
| 80 | "Bad input value <" + inputValue + ">", location, null); |
| 81 | } |
| 82 | |
| 83 | static final private int NUM_TOKENS_CFG_PROP_ID = 3; |
| 84 | static final private int NUM_TOKENS_CFG_ID = 2; |
| 85 | } |