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.ambari.server.api.predicate.operators;
  
  /**
   * Base operator implementation.
   */
  public abstract class AbstractOperator implements Operator {
    /**
     * The precedence value for the current context.
     */
    private final int m_ctxPrecedence;
  
  
    /**
     * Constructor.
     *
     * @param ctxPrecedence  the context precedence value
     */
    protected AbstractOperator(int ctxPrecedence) {
      m_ctxPrecedence = ctxPrecedence;
    }
  
    /**
     * Return the base precedence for this operator.
     * This is the value that is specific to the operator
     * type and doesn't take context into account.
     *
     * @return the base precedence for this operator type
     */
    public int getBasePrecedence() {
      // this value is used for all relational operators
      // logical operators override this value
      return -1;
    }
  
    @Override
    public int getPrecedence() {
      return getBasePrecedence() + m_ctxPrecedence;
    }
  
    @Override
    public String toString() {
      return getName();
    }
  
    /**
     * Get the name of the operator.
     *
     * @return the operator name
     */
    public abstract String getName();
  }
  