mrglavas 2004/09/29 21:13:15
Added: java/src/org/apache/xerces/impl/dv/xs
PrecisionDecimalDV.java
Log:
XML Schema 1.1: Adding a type validator for precisionDecimal
as described in the 07/16/2004 draft [1].
Thanks to Ankit Pasricha for this contribution.
[1] http://www.w3.org/TR/2004/WD-xmlschema11-2-20040716/#precisionDecimal
Revision Changes Path
1.1
xml-xerces/java/src/org/apache/xerces/impl/dv/xs/PrecisionDecimalDV.java
Index: PrecisionDecimalDV.java
===================================================================
/*
* Copyright 2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* 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.apache.xerces.impl.dv.xs;
import org.apache.xerces.impl.dv.InvalidDatatypeValueException;
import org.apache.xerces.impl.dv.ValidationContext;
/**
* <p><b>EXPERIMENTAL: This class should not be considered stable.
* It is likely it may be altered or replaced/removed in the future.</b></p>
* Validator for <precisionDecimal> datatype (W3C Schema 1.1)
*
* @author Ankit Pasricha, IBM
*
* @version $Id: PrecisionDecimalDV.java,v 1.1 2004/09/30 04:13:15 mrglavas Exp $
*/
class PrecisionDecimalDV extends TypeValidator {
static class XPrecisionDecimal {
// sign: 0 for absent; 1 for positive values; -1 for negative values (except
in case of INF, -INF)
int sign = 1;
// total digits. >= 1
int totalDigits = 0;
// integer digits when sign != 0
int intDigits = 0;
// fraction digits when sign != 0
int fracDigits = 0;
//precision
//int precision = 0;
// the string representing the integer part
String ivalue = "";
// the string representing the fraction part
String fvalue = "";
int pvalue = 0;
XPrecisionDecimal(String content) throws NumberFormatException {
if(content.equals("NaN")) {
ivalue = content;
sign = 0;
}
if(content.equals("+INF") || content.equals("INF") ||
content.equals("-INF")) {
ivalue = content.charAt(0) == '+' ? content.substring(1) : content;
return;
}
initD(content);
}
void initD(String content) throws NumberFormatException {
int len = content.length();
if (len == 0)
throw new NumberFormatException();
// these 4 variables are used to indicate where the integre/fraction
// parts start/end.
int intStart = 0, intEnd = 0, fracStart = 0, fracEnd = 0;
// Deal with leading sign symbol if present
if (content.charAt(0) == '+') {
// skip '+', so intStart should be 1
intStart = 1;
}
else if (content.charAt(0) == '-') {
intStart = 1;
sign = -1;
}
// skip leading zeroes in integer part
int actualIntStart = intStart;
while (actualIntStart < len && content.charAt(actualIntStart) == '0') {
actualIntStart++;
}
// Find the ending position of the integer part
for (intEnd = actualIntStart; intEnd < len &&
TypeValidator.isDigit(content.charAt(intEnd)); intEnd++);
// Not reached the end yet
if (intEnd < len) {
// the remaining part is not ".DDD" or "EDDD" or "eDDD", error
if (content.charAt(intEnd) != '.' && content.charAt(intEnd) != 'E'
&& content.charAt(intEnd) != 'e')
throw new NumberFormatException();
if(content.charAt(intEnd) == '.') {
// fraction part starts after '.', and ends at the end of the
input
fracStart = intEnd + 1;
// find location of E or e (if present)
// Find the ending position of the fracion part
for (fracEnd = fracStart;
fracEnd < len && TypeValidator.isDigit(content.charAt(fracEnd));
fracEnd++);
}
else {
pvalue = Integer.parseInt(content.substring(intEnd + 1, len));
}
}
// no integer part, no fraction part, error.
if (intStart == intEnd && fracStart == fracEnd)
throw new NumberFormatException();
// ignore trailing zeroes in fraction part
/*while (fracEnd > fracStart && content.charAt(fracEnd-1) == '0') {
fracEnd--;
}*/
// check whether there is non-digit characters in the fraction part
for (int fracPos = fracStart; fracPos < fracEnd; fracPos++) {
if (!TypeValidator.isDigit(content.charAt(fracPos)))
throw new NumberFormatException();
}
intDigits = intEnd - actualIntStart;
fracDigits = fracEnd - fracStart;
if (intDigits > 0) {
ivalue = content.substring(actualIntStart, intEnd);
}
if (fracDigits > 0) {
fvalue = content.substring(fracStart, fracEnd);
if(fracEnd < len) {
pvalue = Integer.parseInt(content.substring(fracEnd + 1, len));
}
}
totalDigits = intDigits + fracDigits;
}
public boolean equals(Object val) {
if (val == this)
return true;
if (!(val instanceof XPrecisionDecimal))
return false;
XPrecisionDecimal oval = (XPrecisionDecimal)val;
return this.compareTo(oval) == EQUAL;
}
/**
* @return
*/
private int compareFractionalPart(XPrecisionDecimal oval) {
if(fvalue.equals(oval.fvalue))
return EQUAL;
StringBuffer temp1 = new StringBuffer(fvalue);
StringBuffer temp2 = new StringBuffer(oval.fvalue);
truncateTrailingZeros(temp1, temp2);
return temp1.toString().compareTo(temp2.toString());
}
private void truncateTrailingZeros(StringBuffer fValue, StringBuffer
otherFValue) {
for(int i = fValue.length() - 1;i >= 0; i--)
if(fValue.charAt(i) == '0')
fValue.deleteCharAt(i);
else
break;
for(int i = otherFValue.length() - 1;i >= 0; i--)
if(otherFValue.charAt(i) == '0')
otherFValue.deleteCharAt(i);
else
break;
}
public int compareTo(XPrecisionDecimal val) {
// seen NaN
if(sign == 0)
return INDETERMINATE;
//INF is greater than everything and equal to itself
if(ivalue.equals("INF") || val.ivalue.equals("INF")) {
if(ivalue.equals(val.ivalue))
return EQUAL;
else if(ivalue.equals("INF"))
return GREATER_THAN;
return LESS_THAN;
}
//-INF is smaller than everything and equal itself
if(ivalue.equals("-INF") || val.ivalue.equals("-INF")) {
if(ivalue.equals(val.ivalue))
return EQUAL;
else if(ivalue.equals("-INF"))
return LESS_THAN;
return GREATER_THAN;
}
if (sign != val.sign)
return sign > val.sign ? GREATER_THAN : LESS_THAN;
return sign * compare(val);
}
// To enable comparison - the exponent part of the decimal will be limited
// to the max value of int.
private int compare(XPrecisionDecimal val) {
if(pvalue != 0 || val.pvalue != 0) {
if(pvalue == val.pvalue)
return intComp(val);
else {
if(intDigits + pvalue != val.intDigits + val.pvalue)
return intDigits + pvalue > val.intDigits + val.pvalue ?
GREATER_THAN : LESS_THAN;
//otherwise the 2 combined values are the same
if(pvalue > val.pvalue) {
int expDiff = pvalue - val.pvalue;
StringBuffer buffer = new StringBuffer(ivalue);
StringBuffer fbuffer = new StringBuffer(fvalue);
for(int i = 0;i < expDiff; i++) {
if(i < fracDigits) {
buffer.append(fvalue.charAt(i));
fbuffer.deleteCharAt(i);
}
else
buffer.append('0');
}
return compareDecimal(buffer.toString(), val.ivalue,
fbuffer.toString(), val.fvalue);
}
else {
int expDiff = val.pvalue - pvalue;
StringBuffer buffer = new StringBuffer(val.ivalue);
StringBuffer fbuffer = new StringBuffer(val.fvalue);
for(int i = 0;i < expDiff; i++) {
if(i < val.fracDigits) {
buffer.append(val.fvalue.charAt(i));
fbuffer.deleteCharAt(i);
}
else
buffer.append('0');
}
return compareDecimal(ivalue, buffer.toString(), fvalue,
fbuffer.toString());
}
}
}
else {
return intComp(val);
}
}
/**
* @param val
* @return
*/
private int intComp(XPrecisionDecimal val) {
if (intDigits != val.intDigits)
return intDigits > val.intDigits ? GREATER_THAN : LESS_THAN;
return compareDecimal(ivalue, val.ivalue, fvalue, val.fvalue);
}
/**
* @param val
* @return
*/
private int compareDecimal(String iValue, String fValue, String otherIValue,
String otherFValue) {
int ret = iValue.compareTo(otherIValue);
if (ret != 0)
return ret > 0 ? GREATER_THAN : LESS_THAN;
if(fValue.equals(otherFValue))
return EQUAL;
StringBuffer temp1=new StringBuffer(fValue);
StringBuffer temp2=new StringBuffer(otherFValue);
truncateTrailingZeros(temp1, temp2);
ret = temp1.toString().compareTo(temp2.toString());
return ret == 0 ? EQUAL : (ret > 0 ? GREATER_THAN : LESS_THAN);
}
private String canonical;
public synchronized String toString() {
if (canonical == null) {
makeCanonical();
}
return canonical;
}
private void makeCanonical() {
// REVISIT: to be determined by working group
canonical = "TBD by Working Group";
}
/**
* @param decimal
* @return
*/
public boolean isIdentical(XPrecisionDecimal decimal) {
if(ivalue.equals(decimal.ivalue) && (ivalue.equals("INF") ||
ivalue.equals("-INF") || ivalue.equals("NaN")))
return true;
if(sign == decimal.sign && intDigits == decimal.intDigits && fracDigits
== decimal.fracDigits && pvalue == decimal.pvalue
&& ivalue.equals(decimal.ivalue) &&
fvalue.equals(decimal.fvalue))
return true;
return false;
}
}
/* (non-Javadoc)
* @see org.apache.xerces.impl.dv.xs.TypeValidator#getAllowedFacets()
*/
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 | XSSimpleTypeDecl.FACET_TOTALDIGITS |
XSSimpleTypeDecl.FACET_FRACTIONDIGITS);
}
/* (non-Javadoc)
* @see
org.apache.xerces.impl.dv.xs.TypeValidator#getActualValue(java.lang.String,
org.apache.xerces.impl.dv.ValidationContext)
*/
public Object getActualValue(String content, ValidationContext context)
throws InvalidDatatypeValueException {
try {
return new XPrecisionDecimal(content);
} catch (NumberFormatException nfe) {
throw new InvalidDatatypeValueException("cvc-datatype-valid.1.2.1", new
Object[]{content, "precisionDecimal"});
}
}
public int compare(Object value1, Object value2) {
return ((XPrecisionDecimal)value1).compareTo((XPrecisionDecimal)value2);
}
public int getFractionDigits(Object value) {
return ((XPrecisionDecimal)value).fracDigits;
}
public int getTotalDigits(Object value) {
return ((XPrecisionDecimal)value).totalDigits;
}
public boolean isIdentical(Object value1, Object value2) {
if(!(value2 instanceof XPrecisionDecimal) || !(value1 instanceof
XPrecisionDecimal))
return false;
return ((XPrecisionDecimal)value1).isIdentical((XPrecisionDecimal)value2);
}
}
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