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.expression;
  
  import java.util.Objects;
  
  import org.apache.asterix.common.exceptions.CompilationException;
  import org.apache.asterix.lang.common.base.Expression;
  import org.apache.asterix.lang.common.visitor.base.ILangVisitor;
  
  public class ListSliceExpression extends AbstractAccessor {
      private Expression startIndexExpression;
      private Expression endIndexExpression;
  
      public ListSliceExpression(Expression expr, Expression startIndexExpression, Expression endIndexExpression) {
          super(expr);
          this.startIndexExpression = startIndexExpression;
          this.endIndexExpression = endIndexExpression;
      }
  
      public Expression getStartIndexExpression() {
          return startIndexExpression;
      }
  
      public Expression getEndIndexExpression() {
          return endIndexExpression;
      }
  
      // Only end expression can be null (Value not provided)
      public boolean hasEndExpression() {
          return endIndexExpression != null;
      }
  
      public void setStartIndexExpression(Expression startIndexExpression) {
          this.startIndexExpression = startIndexExpression;
      }
  
      public void setEndIndexExpression(Expression endIndexExpression) {
          this.endIndexExpression = endIndexExpression;
      }
  
      @Override
      public Kind getKind() {
          return Kind.LIST_SLICE_EXPRESSION;
      }
  
      @Override
      public <R, T> R accept(ILangVisitor<R, T> visitor, T arg) throws CompilationException {
          return visitor.visit(this, arg);
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(expr, startIndexExpression, endIndexExpression);
      }
  
      @Override
      public boolean equals(Object object) {
          if (this == object) {
              return true;
          }
          if (!(object instanceof ListSliceExpression)) {
              return false;
          }
          ListSliceExpression target = (ListSliceExpression) object;
          return super.equals(target) && Objects.equals(startIndexExpression, target.startIndexExpression)
                  && Objects.equals(endIndexExpression, target.endIndexExpression);
      }
  
      @Override
      public String toString() {
          return expr + "[" + (startIndexExpression + ":" + (hasEndExpression() ? endIndexExpression : "")) + "]";
      }
  }
  