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.visitor.base.ILangVisitor;
  import org.apache.asterix.lang.sqlpp.struct.SetOperationInput;
  import org.apache.asterix.lang.sqlpp.struct.SetOperationRight;
  import org.apache.asterix.lang.sqlpp.visitor.base.ISqlppVisitor;
  
  public class SelectSetOperation extends AbstractClause {
  
      private SetOperationInput leftInput;
      private List<SetOperationRight> rightInputs = new ArrayList<>();
  
      public SelectSetOperation(SetOperationInput leftInput, List<SetOperationRight> rightInputs) {
          this.leftInput = leftInput;
          if (rightInputs != null) {
              this.rightInputs.addAll(rightInputs);
          }
      }
  
      @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_SET_OPERATION;
      }
  
      public SetOperationInput getLeftInput() {
          return leftInput;
      }
  
      public List<SetOperationRight> getRightInputs() {
          return rightInputs;
      }
  
      public boolean hasRightInputs() {
          return rightInputs != null && !rightInputs.isEmpty();
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(leftInput, rightInputs);
      }
  
      @Override
      public boolean equals(Object object) {
          if (this == object) {
              return true;
          }
          if (!(object instanceof SelectSetOperation)) {
              return false;
          }
          SelectSetOperation target = (SelectSetOperation) object;
          return Objects.equals(leftInput, target.leftInput) && Objects.equals(rightInputs, target.rightInputs);
      }
  
      @Override
      public String toString() {
          StringBuilder sb = new StringBuilder();
          sb.append(leftInput);
          for (SetOperationRight right : rightInputs) {
              sb.append(" " + right);
          }
          return sb.toString();
      }
  
  }
  