/*

  * Copyright 2011 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 1.0 (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.opensource.org/licenses/ecl1.php

  *

  * 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.kuali.rice.core.api.criteria;

 import org.apache.commons.lang.builder.EqualsBuilder;

 import org.apache.commons.lang.builder.HashCodeBuilder;

 import org.apache.commons.lang.builder.ToStringBuilder;

 import javax.xml.bind.annotation.XmlAccessType;

 import javax.xml.bind.annotation.XmlAccessorType;

 import javax.xml.bind.annotation.XmlRootElement;

 import javax.xml.bind.annotation.XmlType;

 import javax.xml.bind.annotation.XmlValue;

 import java.math.BigInteger;

 /**

  * A CriteriaValue which stores date and time information in the form of a

  * {@link BigInteger} value.

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  *

  */

 @XmlRootElement(name = CriteriaIntegerValue.Constants.ROOT_ELEMENT_NAME)

 @XmlAccessorType(XmlAccessType.NONE)

 @XmlType(name = CriteriaIntegerValue.Constants.TYPE_NAME)

 public final class CriteriaIntegerValue implements CriteriaValue<BigInteger> {

     @XmlValue

     private BigInteger value;

     CriteriaIntegerValue() {

         this.value = null;

     }

     CriteriaIntegerValue(BigInteger value) {

             validateValue(value);

         this.value = safeInstance(value);

     }

     CriteriaIntegerValue(Number value) {

             validateValue(value);

             this.value = BigInteger.valueOf(value.longValue());

     }

     private static void validateValue(Object value) {

             if (value == null) {

                     throw new IllegalArgumentException("Value cannot be null.");

             }

     }

     /**

      * Since BigInteger is not technically immutable we defensively copy when needed.

      *

      * see Effective Java 2nd ed. page 79 for details.

      *

      * @param val the big integer to check

      * @return the safe BigInteger

      */

     private static BigInteger safeInstance(BigInteger val) {

         if (val.getClass() != BigInteger.class) {

             return new BigInteger(val.toByteArray());

         }

         return val;

     }

     @Override

     public BigInteger getValue() {

         return value;

     }

     @Override

     public int hashCode() {

         return HashCodeBuilder.reflectionHashCode(this);

     }

     @Override

     public boolean equals(Object obj) {

         return EqualsBuilder.reflectionEquals(obj, this);

     }

     @Override

     public String toString() {

         return ToStringBuilder.reflectionToString(this);

     }

     /**

      * Defines some internal constants used on this class.

      */

     static class Constants {

         final static String ROOT_ELEMENT_NAME = "integerValue";

         final static String TYPE_NAME = "CriteriaIntegerValueType";

     }

 }