plugins/org.eclipse.xsd/src/org/eclipse/xsd/impl/type/XSDDoubleType.java

/**
 * Copyright (c) 2002-2006 IBM Corporation and others.
 * All rights reserved.   This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v20.html
 * 
 * Contributors: 
 *   IBM - Initial API and implementation
 */
package org.eclipse.xsd.impl.type;

public class XSDDoubleType extends XSDAnySimpleType
{
  protected static final Double NaN = Double.NaN;
  protected static final Double NEGATIVE_INFINITY = Double.NEGATIVE_INFINITY;
  protected static final Double POSITIVE_INFINITY = Double.POSITIVE_INFINITY;

  @Override
  public Object getValue(String literal)
  {
    try 
    {
      if ("NaN".equals(literal))
      {
        return NaN;
      }
      else if ("-INF".equals(literal))
      {
        return NEGATIVE_INFINITY;
      }
      else if ("INF".equals(literal))
      {
        return POSITIVE_INFINITY;
      }
      else if (literal != null && literal.contains("Infinity"))
      {
        // Be sure to treat Java's infinity representation as invalid.
        //
        return null;
      }
      else
      {
        return new Double(literal);
      }
    }
    catch (NumberFormatException e)
    {
      return null;
    }
  }

  @Override
  public int compareValues(Object value1, Object value2)
  {
    return ((Double)value1).compareTo((Double)value2);
  }
}