AbstractIntegerAdapter.java

/*
 * Portions of this software was developed by employees of the National Institute
 * of Standards and Technology (NIST), an agency of the Federal Government and is
 * being made available as a public service. Pursuant to title 17 United States
 * Code Section 105, works of NIST employees are not subject to copyright
 * protection in the United States. This software may be subject to foreign
 * copyright. Permission in the United States and in foreign countries, to the
 * extent that NIST may hold copyright, to use, copy, modify, create derivative
 * works, and distribute this software and its documentation without fee is hereby
 * granted on a non-exclusive basis, provided that this notice and disclaimer
 * of warranty appears in all copies.
 *
 * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
 * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
 * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
 * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
 * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE.  IN NO EVENT
 * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
 * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
 * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
 * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
 * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
 * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
 */

package gov.nist.secauto.metaschema.core.datatype.adapter;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatTypes;

import gov.nist.secauto.metaschema.core.datatype.AbstractDataTypeAdapter;
import gov.nist.secauto.metaschema.core.metapath.item.atomic.IIntegerItem;

import java.io.IOException;
import java.math.BigInteger;

/**
 * Provides a common base class for integer-based data types.
 * <p>
 * An underlying {@link BigInteger} is used to support arbitrary sized integers.
 *
 * @param <ITEM_TYPE>
 *          the Metapath item type supported by the adapter
 */
public abstract class AbstractIntegerAdapter<ITEM_TYPE extends IIntegerItem>
    extends AbstractDataTypeAdapter<BigInteger, ITEM_TYPE> {

  /**
   * Construct a new integer-based adapter.
   */
  protected AbstractIntegerAdapter() {
    super(BigInteger.class);
  }

  @Override
  public JsonFormatTypes getJsonRawType() {
    return JsonFormatTypes.INTEGER;
  }

  @Override
  public BigInteger parse(String value) {
    return new BigInteger(value);
  }

  @Override
  public void writeJsonValue(Object value, JsonGenerator generator) throws IOException {
    try {
      generator.writeNumber((BigInteger) value);
    } catch (ClassCastException ex) {
      throw new IOException(ex);
    }
  }

  @Override
  public BigInteger copy(Object obj) {
    // a BigInteger is immutable
    return (BigInteger) obj;
  }
}