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 * 5. Due credit should be given to the Exolab Project (http://www.exolab.org/).
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 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTALIO, INC. OR ITS
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Copyright 2000-2003 (C) Intalio, Inc. All Rights Reserved.
 *
 * $Id$ Date Author Changes 10/26/2000 Arnaud Blandin Created
 */
package org.exolab.castor.xml.validators;

import org.exolab.castor.xml.ValidationContext;
import org.exolab.castor.xml.ValidationException;
import org.exolab.castor.xml.TypeValidator;
import org.exolab.castor.types.Duration;

/**
 * The Duration Validation class. This class handles validation for the Castor XML Schema duration
 * type.
 *
 * @author <a href="mailto:visco@intalio.com">Keith Visco</a>
 * @author <a href="mailto:blandin@intalio.com">Arnaud Blandin</a>
 * @version $Revision$ $Date: 2003-03-03 02:57:21 -0700 (Mon, 03 Mar 2003) $
 */
public class DurationValidator extends PatternValidator implements TypeValidator {

  /** Maximum allowed value (Inclusive) for a valid instance. (null if not set.) */
  private Duration _maxInclusive;
  /** Maximum allowed value (Exclusive) for a valid instance. (null if not set.) */
  private Duration _maxExclusive;
  /** Minimum allowed value (Inclusive) for a valid instance. (null if not set.) */
  private Duration _minInclusive;
  /** Minimum allowed value (Exclusive) for a valid instance. (null if not set.) */
  private Duration _minExclusive;
  /** Fixed value. If not null, a valid duration instance MUST have this value. */
  private Duration _fixed;

  /**
   * No-arg constructor.
   */
  public DurationValidator() {
    super();
  } // -- TimeDurationValidator

  /**
   * Clears the fixed value for this Duration.
   */
  public void clearFixed() {
    _fixed = null;
  } // -- clearFixed

  /**
   * Clears the maximum value for this Duration.
   */
  public void clearMax() {
    _maxInclusive = null;
    _maxExclusive = null;
  } // -- clearMax

  /**
   * Clears the minimum value for this Duration.
   */
  public void clearMin() {
    _minInclusive = null;
    _minExclusive = null;
  } // -- clearMin

  /**
   * Returns the configured fixed value for Duration validation. Returns null if no fixed value has
   * been configured.
   *
   * @return the fixed value to validate against.
   */
  public Duration getFixed() {
    return _fixed;
  } // -- getFixed

  /**
   * Returns the configured inclusive maximum value for Duration validation. Returns null if no
   * inclusive maximum has been configured.
   *
   * @return the inclusive maximum value to validate against.
   */
  public Duration getMaxInclusive() {
    return _maxInclusive;
  } // -- getMaxInclusive

  /**
   * Returns the configured exclusive maximum value for Duration validation. Returns null if no
   * exclusive maximum has been configured.
   *
   * @return the exclusive maximum value to validate against.
   */
  public Duration getMaxExclusive() {
    return _maxExclusive;
  } // -- getMaxInclusive

  /**
   * Returns the configured inclusive minimum value for Duration validation. Returns null if no
   * inclusive minimum has been configured.
   *
   * @return the inclusive minimum value to validate against.
   */
  public Duration getMinInclusive() {
    return _minInclusive;
  } // -- getMinInclusive

  /**
   * Returns the configured exclusive minimum value for Duration validation. Returns null if no
   * exclusive minimum has been configured.
   *
   * @return the exclusive minimum value to validate against.
   */
  public Duration getMinExclusive() {
    return _minExclusive;
  } // -- getMinInclusive

  /**
   * Returns true if a fixed value to validate against has been set.
   *
   * @return true if a fixed value has been set.
   */
  public boolean hasFixed() {
    return _fixed != null;
  } // -- hasFixed

  /**
   * Sets the fixed value for Duration validation.
   * <p>
   * NOTE: If maximum and/or minimum values have been set and the fixed value is not within that
   * max/min range, then no Duration will pass validation. This is as according to the XML Schema
   * spec.
   *
   * @param fixedValue the fixed value that a Duration validated with this validator must be equal
   *        to.
   */
  public void setFixed(final Duration fixedValue) {
    _fixed = fixedValue;
  }

  /**
   * Sets the minimum (exclusive) value for Duration validation. To pass validation, a Duration must
   * be greater than this value.
   *
   * @param minValue the minimum (exclusive) value for Duration validation.
   */
  public void setMinExclusive(final Duration minValue) {
    _minExclusive = minValue;
    _minInclusive = null;
  } // -- setMinExclusive

  /**
   * Sets the minimum (inclusive) value for Duration validation. To pass validation, a Duration must
   * be greater than or equal to this value.
   *
   * @param minValue the minimum (inclusive) value for Duration validation.
   */
  public void setMinInclusive(final Duration minValue) {
    _minInclusive = minValue;
    _minExclusive = null;
  } // -- setMinInclusive

  /**
   * Sets the maximum (exclusive) value for Duration validation. To pass validation, a Duration must
   * be less than this value.
   *
   * @param maxValue the maximum (exclusive) value for Duration validation.
   */
  public void setMaxExclusive(final Duration maxValue) {
    _maxExclusive = maxValue;
    _maxInclusive = null;
  } // -- setMaxExclusive

  /**
   * Sets the maximum (inclusive) value for Duration validation. To pass validation, a Duration must
   * be less than or equal to this value.
   *
   * @param maxValue the maximum (inclusive) value for Duration validation.
   */
  public void setMaxInclusive(final Duration maxValue) {
    _maxInclusive = maxValue;
    _maxExclusive = null;
  } // -- setMaxInclusive

  /**
   * Validate a duration instance.
   * 
   * @param duration the duration to validate
   * @throws ValidationException if the duration fails validation
   */
  public void validate(final Duration duration) throws ValidationException {
    validate(duration, (ValidationContext) null);
  }

  /**
   * Validates a duration instance.
   * 
   * @param duration the duration type to validate
   * @param context the ValidationContext
   * @throws ValidationException if the duration fails validation
   */
  public void validate(final Duration duration, final ValidationContext context)
      throws ValidationException {
    boolean isThereMinInclusive = (_minInclusive != null);
    boolean isThereMinExclusive = (_minExclusive != null);
    boolean isThereMaxInclusive = (_maxInclusive != null);
    boolean isThereMaxExclusive = (_maxExclusive != null);

    if (isThereMinExclusive && isThereMinInclusive) {
      throw new ValidationException("Both minInclusive and minExclusive are defined");
    }

    if (isThereMaxExclusive && isThereMaxInclusive) {
      throw new ValidationException("Both maxInclusive and maxExclusive are defined");
    }

    if (_fixed != null && !duration.equal(_fixed)) {
      String err = "Duration " + duration + " is not equal to the fixed value: " + _fixed;
      throw new ValidationException(err);
    }

    if (isThereMinInclusive && _minInclusive.isGreater(duration)) {
      String err =
          "Duration " + duration + " is less than the minimum allowed value: " + _minInclusive;
      throw new ValidationException(err);
    }

    if (isThereMinExclusive
        && (_minExclusive.isGreater(duration) || duration.equals(_minExclusive))) {
      String err = "Duration " + duration
          + " is less than or equal to the minimum exclusive value: " + _minExclusive;
      throw new ValidationException(err);
    }

    if (isThereMaxInclusive && duration.isGreater(_maxInclusive)) {
      String err =
          "Duration " + duration + " is greater than the maximum allowed value " + _maxInclusive;
      throw new ValidationException(err);
    }

    if (isThereMaxExclusive
        && ((duration.isGreater(_maxExclusive)) || duration.equals(_maxExclusive))) {
      String err = "Duration " + duration
          + " is greater than or equal to the maximum exclusive value: " + _maxExclusive;
      throw new ValidationException(err);
    }

    if (hasPattern()) {
      super.validate(duration.toString(), context);
    }
  } // -- validate

  /**
   * Validates the given Object.
   *
   * @param object the Object to validate
   * @throws ValidationException if the object fails validation
   */
  public void validate(final Object object) throws ValidationException {
    validate(object, (ValidationContext) null);
  } // -- validate

  /**
   * Validates the given Object.
   *
   * @param object the Object to validate
   * @param context the ValidationContext
   * @throws ValidationException if the object fails validation
   */
  public void validate(final Object object, final ValidationContext context)
      throws ValidationException {
    if (object == null) {
      String err = "durationValidator cannot validate a null object.";
      throw new ValidationException(err);
    }

    if (object instanceof String) {
      try {
        Duration duration = Duration.parseDuration((String) object);
        validate(duration, context);
        return;
      } catch (java.text.ParseException pe) {
        String err = "String provided fails to parse into a Duration: " + (String) object;
        throw new ValidationException(err, pe);
      }
    }

    Duration value = null;
    try {
      value = (Duration) object;
    } catch (Exception ex) {
      String err = "Expecting a duration, received instead: " + object.getClass().getName();
      throw new ValidationException(err);
    }

    validate(value, context);
  } // -- validate

}
