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A Lightweight Java Job Scheduling Framework
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/*
 * All content copyright Terracotta, Inc., unless otherwise indicated. All rights reserved.
 * 
 * Licensed 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.quartz.impl.matchers;

import org.quartz.Matcher;
import org.quartz.utils.Key;

/**
 * An abstract base class for some types of matchers.
 * 
 * @author jhouse
 */
public abstract class StringMatcher implements Matcher {

  public enum StringOperatorName {

    EQUALS {

      @Override
      public boolean evaluate(final String value, final String compareTo) {

        return value.equals(compareTo);
      }
    },

    STARTS_WITH {

      @Override
      public boolean evaluate(final String value, final String compareTo) {

        return value.startsWith(compareTo);
      }
    },

    ENDS_WITH {

      @Override
      public boolean evaluate(final String value, final String compareTo) {

        return value.endsWith(compareTo);
      }
    },

    CONTAINS {

      @Override
      public boolean evaluate(final String value, final String compareTo) {

        return value.contains(compareTo);
      }
    };

    public abstract boolean evaluate(String value, String compareTo);
  }

  protected String compareTo;
  protected StringOperatorName compareWith;

  protected StringMatcher(String compareTo, StringOperatorName compareWith) {

    if (compareTo == null)
      throw new IllegalArgumentException("CompareTo value cannot be null!");
    if (compareWith == null)
      throw new IllegalArgumentException("CompareWith operator cannot be null!");

    this.compareTo = compareTo;
    this.compareWith = compareWith;
  }

  protected abstract String getValue(T key);

  public boolean isMatch(T key) {

    return compareWith.evaluate(getValue(key), compareTo);
  }

  @Override
  public int hashCode() {

    final int prime = 31;
    int result = 1;
    result = prime * result + ((compareTo == null) ? 0 : compareTo.hashCode());
    result = prime * result + ((compareWith == null) ? 0 : compareWith.hashCode());
    return result;
  }

  @Override
  public boolean equals(Object obj) {

    if (this == obj)
      return true;
    if (obj == null)
      return false;
    if (getClass() != obj.getClass())
      return false;
    StringMatcher other = (StringMatcher) obj;
    if (compareTo == null) {
      if (other.compareTo != null)
        return false;
    } else if (!compareTo.equals(other.compareTo))
      return false;
    if (compareWith == null) {
      if (other.compareWith != null)
        return false;
    } else if (!compareWith.equals(other.compareWith))
      return false;
    return true;
  }

  public String getCompareToValue() {

    return compareTo;
  }

  public StringOperatorName getCompareWithOperator() {

    return compareWith;
  }

}