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

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   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 package org.argeo.slc.core.execution.tasks;
  17
  18 import java.util.ArrayList;
  19 import java.util.List;
  20
  21 import org.springframework.beans.factory.FactoryBean;
  22
  23 /** Merge the provided lists in one single list, in the order provided. */
  24 public class MergedLists implements FactoryBean<List<Object>> {
  25         private List<List<Object>> lists = new ArrayList<List<Object>>();
  26
  27         public void setLists(List<List<Object>> lists) {
  28                 this.lists = lists;
  29         }
  30
  31         public List<Object> getObject() throws Exception {
  32                 List<Object> merged = new ArrayList<Object>();
  33                 for (List<Object> lst : lists) {
  34                         merged.addAll(lst);
  35                 }
  36                 return merged;
  37         }
  38
  39         public Class<?> getObjectType() {
  40                 return List.class;
  41         }
  42
  43         public boolean isSingleton() {
  44                 return false;
  45         }
  46
  47 }