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.lang.common.statement;
  
  import org.apache.asterix.common.exceptions.CompilationException;
  import org.apache.asterix.common.exceptions.ErrorCode;
  import org.apache.asterix.common.metadata.DataverseName;
  import org.apache.asterix.common.metadata.Namespace;
  import org.apache.asterix.lang.common.base.AbstractStatement;
  import org.apache.asterix.lang.common.expression.RecordConstructor;
  import org.apache.asterix.lang.common.util.FullTextUtil;
  import org.apache.asterix.lang.common.visitor.base.ILangVisitor;
  import org.apache.asterix.object.base.AdmArrayNode;
  import org.apache.asterix.object.base.AdmObjectNode;
  import org.apache.asterix.object.base.AdmStringNode;
  import org.apache.asterix.object.base.IAdmNode;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  
  import com.google.common.collect.ImmutableList;
  
  public class CreateFullTextFilterStatement extends AbstractStatement {
  
      private final Namespace namespace;
      private final String filterName;
      private final boolean ifNotExists;
      private final AdmObjectNode filterNode;
  
      public static final String FIELD_NAME_TYPE = "type";
      public static final String FIELD_NAME_STOPWORDS_LIST = "stopwordsList";
      public static final String FIELD_TYPE_STOPWORDS = "stopwords";
  
      public CreateFullTextFilterStatement(Namespace namespace, String filterName, boolean ifNotExists,
              RecordConstructor expr) throws CompilationException {
          this.namespace = namespace;
          this.filterName = filterName;
          this.ifNotExists = ifNotExists;
          this.filterNode = FullTextUtil.getFilterNode(expr);
      }
  
      public Namespace getNamespace() {
          return namespace;
      }
  
      public DataverseName getDataverseName() {
          return namespace == null ? null : namespace.getDataverseName();
      }
  
      public String getFilterName() {
          return filterName;
      }
  
      public boolean getIfNotExists() {
          return this.ifNotExists;
      }
  
      public String getFilterType() throws HyracksDataException {
          return filterNode.getString(FIELD_NAME_TYPE);
      }
  
      public ImmutableList<String> getStopwordsList() throws CompilationException {
          ImmutableList.Builder<String> listBuilder = ImmutableList.builder();
          AdmArrayNode arrayNode = (AdmArrayNode) filterNode.get(FIELD_NAME_STOPWORDS_LIST);
  
          for (IAdmNode node : arrayNode) {
              if (!(node instanceof AdmStringNode)) {
                  throw new CompilationException(ErrorCode.PARSE_ERROR, getSourceLocation(),
                          "error when parsing stopwords list");
              }
  
              listBuilder.add(((AdmStringNode) node).get());
          }
  
          return listBuilder.build();
      }
  
      @Override
      public Kind getKind() {
          return Kind.CREATE_FULL_TEXT_FILTER;
      }
  
      @Override
      public <R, T> R accept(ILangVisitor<R, T> visitor, T arg) throws CompilationException {
          return visitor.visit(this, arg);
      }
  
      @Override
      public byte getCategory() {
          return Category.DDL;
      }
  }
  