runtime/org.argeo.slc.core/src/main/java/org/argeo/slc/core/execution/tasks/MergedLists.java

   1 /*
   2  * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.argeo.slc.core.execution.tasks;
  18
  19 import java.util.ArrayList;
  20 import java.util.List;
  21
  22 import org.springframework.beans.factory.FactoryBean;
  23
  24 /** Merge the provided lists in one single list, in the order provided. */
  25 public class MergedLists implements FactoryBean {
  26         private List<List<Object>> lists = new ArrayList<List<Object>>();
  27
  28         public void setLists(List<List<Object>> lists) {
  29                 this.lists = lists;
  30         }
  31
  32         public Object getObject() throws Exception {
  33                 List<Object> merged = new ArrayList<Object>();
  34                 for (List<Object> lst : lists) {
  35                         merged.addAll(lst);
  36                 }
  37                 return merged;
  38         }
  39
  40         public Class<?> getObjectType() {
  41                 return List.class;
  42         }
  43
  44         public boolean isSingleton() {
  45                 return false;
  46         }
  47
  48 }