content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.asterix.external.library;
  
  import org.apache.asterix.external.api.IJObject;
  import org.apache.asterix.external.library.java.base.JBoolean;
  import org.apache.asterix.external.library.java.base.JDate;
  import org.apache.asterix.external.library.java.base.JDateTime;
  import org.apache.asterix.external.library.java.base.JDouble;
  import org.apache.asterix.external.library.java.base.JDuration;
  import org.apache.asterix.external.library.java.base.JFloat;
  import org.apache.asterix.external.library.java.base.JInt;
  import org.apache.asterix.external.library.java.base.JInterval;
  import org.apache.asterix.external.library.java.base.JLong;
  import org.apache.asterix.external.library.java.base.JMissing;
  import org.apache.asterix.external.library.java.base.JNull;
  import org.apache.asterix.external.library.java.base.JOrderedList;
  import org.apache.asterix.external.library.java.base.JRecord;
  import org.apache.asterix.external.library.java.base.JString;
  import org.apache.asterix.external.library.java.base.JTime;
  import org.apache.asterix.external.library.java.base.JUnorderedList;
  import org.apache.asterix.om.types.AOrderedListType;
  import org.apache.asterix.om.types.ARecordType;
  import org.apache.asterix.om.types.AUnionType;
  import org.apache.asterix.om.types.AUnorderedListType;
  import org.apache.asterix.om.types.IAType;
  import org.apache.asterix.om.util.container.IObjectFactory;
  
  public class JTypeObjectFactory implements IObjectFactory<IJObject, IAType> {
  
      public static final JTypeObjectFactory INSTANCE = new JTypeObjectFactory();
  
      private JTypeObjectFactory() {
      }
  
      @Override
      public IJObject create(IAType type) {
          IJObject retValue = null;
          switch (type.getTypeTag()) {
              case INTEGER:
                  retValue = new JInt(0);
                  break;
              case STRING:
                  retValue = new JString("");
                  break;
              case FLOAT:
                  retValue = new JFloat(0);
                  break;
              case DOUBLE:
                  retValue = new JDouble(0);
                  break;
              case BOOLEAN:
                  retValue = new JBoolean(false);
                  break;
              case DATE:
                  retValue = new JDate(0);
                  break;
              case DATETIME:
                  retValue = new JDateTime(0);
                  break;
              case DURATION:
                  retValue = new JDuration(0, 0);
                  break;
              case INTERVAL:
                  retValue = new JInterval(0, 0);
                  break;
              case TIME:
                  retValue = new JTime(0);
                  break;
              case BIGINT:
                  retValue = new JLong(0);
                  break;
              case NULL:
                  retValue = JNull.INSTANCE;
                  break;
              case MISSING:
                  retValue = JMissing.INSTANCE;
                  break;
              case ARRAY:
                  AOrderedListType ot = (AOrderedListType) type;
                  IAType orderedItemType = ot.getItemType();
                  retValue = new JOrderedList(orderedItemType);
                  break;
              case MULTISET:
                  AUnorderedListType ut = (AUnorderedListType) type;
                  IAType unorderedItemType = ut.getItemType();
                  retValue = new JUnorderedList(unorderedItemType);
                  break;
              case OBJECT:
                  IAType[] fieldTypes = ((ARecordType) type).getFieldTypes();
                  IJObject[] fieldObjects = null;
                  if (fieldTypes != null) {
                      fieldObjects = new IJObject[fieldTypes.length];
                      int index = 0;
                      for (IAType fieldType : fieldTypes) {
                          fieldObjects[index] = create(fieldType);
                          index++;
                      }
                      retValue = new JRecord((ARecordType) type, fieldObjects);
                  } else {
                      retValue = new JRecord((ARecordType) type, new IJObject[] {});
                  }
                  break;
              case UNION:
                  AUnionType unionType = (AUnionType) type;
                  IJObject itemObject = null;
                  if (unionType.isMissableType()) {
                      itemObject = create(unionType);
                  }
                  retValue = itemObject;
                  break;
              default:
                  break;
          }
          return retValue;
      }
  
  }
  