/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2001-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xerces" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 2001, International
* Business Machines, Inc., http://www.apache.org. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package com.sun.org.apache.xerces.internal.impl.dv.xs;
import com.sun.org.apache.xerces.internal.impl.dv.InvalidDatatypeValueException;
import com.sun.org.apache.xerces.internal.impl.dv.ValidationContext;
/**
* Represent the schema type "float"
*
* @author Neeraj Bajaj, Sun Microsystems, inc.
* @author Sandy Gao, IBM
*
* @version $Id: FloatDV.java,v 1.6 2003/02/17 13:45:57 sandygao Exp $
*/
public class FloatDV extends TypeValidator {
public short getAllowedFacets(){
return ( XSSimpleTypeDecl.FACET_PATTERN | XSSimpleTypeDecl.FACET_WHITESPACE | XSSimpleTypeDecl.FACET_ENUMERATION |XSSimpleTypeDecl.FACET_MAXINCLUSIVE |XSSimpleTypeDecl.FACET_MININCLUSIVE | XSSimpleTypeDecl.FACET_MAXEXCLUSIVE | XSSimpleTypeDecl.FACET_MINEXCLUSIVE );
}//getAllowedFacets()
//convert a String to Float form, we have to take care of cases specified in spec like INF, -INF and NaN
public Object getActualValue(String content, ValidationContext context) throws InvalidDatatypeValueException {
try{
return new XFloat(content);
} catch (NumberFormatException ex){
throw new InvalidDatatypeValueException("cvc-datatype-valid.1.2.1", new Object[]{content, "float"});
}
}//getActualValue()
// Can't call Float#compareTo method, because it's introduced in jdk 1.2
public int compare(Object value1, Object value2){
return ((XFloat)value1).compareTo((XFloat)value2);
}//compare()
private static final class XFloat {
private float value;
public XFloat(String s) throws NumberFormatException {
try {
value = Float.parseFloat(s);
}
catch ( NumberFormatException nfe ) {
if ( s.equals("INF") ) {
value = Float.POSITIVE_INFINITY;
}
else if ( s.equals("-INF") ) {
value = Float.NEGATIVE_INFINITY;
}
else if ( s.equals("NaN" ) ) {
value = Float.NaN;
}
else {
throw nfe;
}
}
}
public boolean equals(Object val) {
if (val == this)
return true;
if (!(val instanceof XFloat))
return false;
XFloat oval = (XFloat)val;
// NOTE: we don't distinguish 0.0 from -0.0
if (value == oval.value)
return true;
if (value != value && oval.value != oval.value)
return true;
return false;
}
private int compareTo(XFloat val) {
float oval = val.value;
// this < other
if (value < oval)
return -1;
// this > other
if (value > oval)
return 1;
// this == other
// NOTE: we don't distinguish 0.0 from -0.0
if (value == oval)
return 0;
// one of the 2 values or both is/are NaN(s)
if (value != value) {
// this = NaN = other
if (oval != oval)
return 0;
// this is NaN <> other
return INDETERMINATE;
}
// other is NaN <> this
return INDETERMINATE;
}
private String canonical;
public synchronized String toString() {
if (canonical == null) {
if (value == Float.POSITIVE_INFINITY)
canonical = "INF";
else if (value == Float.NEGATIVE_INFINITY)
canonical = "-INF";
else if (value != value)
canonical = "NaN";
// NOTE: we don't distinguish 0.0 from -0.0
else if (value == 0)
canonical = "0.0E1";
else {
// REVISIT: use the java algorithm for now, because we
// don't know what to output for 1.1f (which is no
// actually 1.1)
canonical = Float.toString(value);
// if it contains 'E', then it should be a valid schema
// canonical representation
if (canonical.indexOf('E') == -1) {
int len = canonical.length();
// at most 3 longer: E, -, 9
char[] chars = new char[len+3];
canonical.getChars(0, len, chars, 0);
// expected decimal point position
int edp = chars[0] == '-' ? 2 : 1;
// for non-zero integer part
if (value >= 1 || value <= -1) {
// decimal point position
int dp = canonical.indexOf('.');
// move the digits: ddd.d --> d.ddd
for (int i = dp; i > edp; i--) {
chars[i] = chars[i-1];
}
chars[edp] = '.';
// trim trailing zeros: d00.0 --> d.000 --> d.
while (chars[len-1] == '0')
len--;
// add the last zero if necessary: d. --> d.0
if (chars[len-1] == '.')
len++;
// append E: d.dd --> d.ddE
chars[len++] = 'E';
// how far we shifted the decimal point
int shift = dp - edp;
// append the exponent --> d.ddEd
// the exponent is at most 7
chars[len++] = (char)(shift + '0');
}
else {
// non-zero digit point
int nzp = edp + 1;
// skip zeros: 0.003
while (chars[nzp] == '0')
nzp++;
// put the first non-zero digit to the left of '.'
chars[edp-1] = chars[nzp];
chars[edp] = '.';
// move other digits (non-zero) to the right of '.'
for (int i = nzp+1, j = edp+1; i < len; i++, j++)
chars[j] = chars[i];
// adjust the length
len -= nzp - edp;
// append 0 if nessary: 0.03 --> 3. --> 3.0
if (len == edp + 1)
chars[len++] = '0';
// append E-: d.dd --> d.ddE-
chars[len++] = 'E';
chars[len++] = '-';
// how far we shifted the decimal point
int shift = nzp - edp;
// append the exponent --> d.ddEd
// the exponent is at most 3
chars[len++] = (char)(shift + '0');
}
canonical = new String(chars, 0, len);
}
}
}
return canonical;
}
}
} // class FloatDV
|
