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.sqlpp.clause;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Objects;
  
  import org.apache.asterix.common.exceptions.CompilationException;
  import org.apache.asterix.lang.common.base.AbstractClause;
  import org.apache.asterix.lang.common.clause.GroupbyClause;
  import org.apache.asterix.lang.common.visitor.base.ILangVisitor;
  import org.apache.asterix.lang.sqlpp.visitor.base.ISqlppVisitor;
  
  public class SelectBlock extends AbstractClause {
  
      private SelectClause selectClause;
      private FromClause fromClause;
      private final List<AbstractClause> letWhereClauses = new ArrayList<>();
      private GroupbyClause groupbyClause;
      private final List<AbstractClause> letHavingClausesAfterGby = new ArrayList<>();
  
      public SelectBlock(SelectClause selectClause, FromClause fromClause, List<AbstractClause> letWhereClauses,
              GroupbyClause groupbyClause, List<AbstractClause> letHavingClausesAfterGby) {
          this.selectClause = selectClause;
          this.fromClause = fromClause;
          if (letWhereClauses != null) {
              this.letWhereClauses.addAll(letWhereClauses);
          }
          this.groupbyClause = groupbyClause;
          if (letHavingClausesAfterGby != null) {
              this.letHavingClausesAfterGby.addAll(letHavingClausesAfterGby);
          }
      }
  
      @Override
      public <R, T> R accept(ILangVisitor<R, T> visitor, T arg) throws CompilationException {
          return ((ISqlppVisitor<R, T>) visitor).visit(this, arg);
      }
  
      @Override
      public ClauseType getClauseType() {
          return ClauseType.SELECT_BLOCK;
      }
  
      public SelectClause getSelectClause() {
          return selectClause;
      }
  
      public void setSelectClause(SelectClause selectClause) {
          this.selectClause = selectClause;
      }
  
      public FromClause getFromClause() {
          return fromClause;
      }
  
      public void setFromClause(FromClause fromClause) {
          this.fromClause = fromClause;
      }
  
      public List<AbstractClause> getLetWhereList() {
          return letWhereClauses;
      }
  
      public GroupbyClause getGroupbyClause() {
          return groupbyClause;
      }
  
      public void setGroupbyClause(GroupbyClause groupbyClause) {
          this.groupbyClause = groupbyClause;
      }
  
      public List<AbstractClause> getLetHavingListAfterGroupby() {
          return letHavingClausesAfterGby;
      }
  
      public boolean hasFromClause() {
          return fromClause != null;
      }
  
      public boolean hasLetWhereClauses() {
          return !letWhereClauses.isEmpty();
      }
  
      public boolean hasGroupbyClause() {
          return groupbyClause != null;
      }
  
      public boolean hasLetHavingClausesAfterGroupby() {
          return !letHavingClausesAfterGby.isEmpty();
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(fromClause, groupbyClause, letWhereClauses, letHavingClausesAfterGby, selectClause);
      }
  
      @Override
      @SuppressWarnings("squid:S1067") // expressions should not be too complex
      public boolean equals(Object object) {
          if (this == object) {
              return true;
          }
          if (!(object instanceof SelectBlock)) {
              return false;
          }
          SelectBlock target = (SelectBlock) object;
          return Objects.equals(fromClause, target.fromClause) && Objects.equals(groupbyClause, target.groupbyClause)
                  && Objects.equals(letWhereClauses, target.letWhereClauses)
                  && Objects.equals(letHavingClausesAfterGby, target.letHavingClausesAfterGby)
                  && Objects.equals(selectClause, target.selectClause);
      }
  
      @Override
      public String toString() {
          StringBuilder sb = new StringBuilder();
          sb.append(selectClause);
          if (hasFromClause()) {
              sb.append(' ').append(fromClause);
          }
          if (hasLetWhereClauses()) {
              sb.append(' ').append(letWhereClauses);
          }
          if (hasGroupbyClause()) {
              sb.append(' ').append(groupbyClause);
          }
          if (hasLetHavingClausesAfterGroupby()) {
              sb.append(' ').append(letHavingClausesAfterGby);
          }
          return sb.toString();
      }
  }
  