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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;
/**
* All primitive types plus ID/IDREF/ENTITY/INTEGER are derived from this abstract
* class. It provides extra information XSSimpleTypeDecl requires from each
* type: allowed facets, converting String to actual value, check equality,
* comparison, etc.
*
* @xerces.internal
*
* @author Neeraj Bajaj, Sun Microsystems, inc.
* @author Sandy Gao, IBM
*
* @version $Id: TypeValidator.java,v 1.6 2010-11-01 04:39:47 joehw Exp $
*/
public abstract class TypeValidator {
// which facets are allowed for this type
public abstract short getAllowedFacets();
// convert a string to an actual value. for example,
// for number types (decimal, double, float, and types derived from them),
// get the BigDecimal, Double, Flout object.
// for some types (string and derived), they just return the string itself
public abstract Object getActualValue(String content, ValidationContext context)
throws InvalidDatatypeValueException;
// for ID/IDREF/ENTITY types, do some extra checking after the value is
// checked to be valid with respect to both lexical representation and
// facets
public void checkExtraRules(Object value, ValidationContext context) throws InvalidDatatypeValueException {
}
// the following methods might not be supported by every DV.
// but XSSimpleTypeDecl should know which type supports which methods,
// and it's an *internal* error if a method is called on a DV that
// doesn't support it.
//order constants
public static final short LESS_THAN = -1;
public static final short EQUAL = 0;
public static final short GREATER_THAN = 1;
public static final short INDETERMINATE = 2;
// where there is distinction between identity and equality, this method
// will be overwritten
// checks whether the two values are identical; for ex, this distinguishes
// -0.0 from 0.0
public boolean isIdentical (Object value1, Object value2) {
return value1.equals(value2);
}
// check the order relation between the two values
// the parameters are in compiled form (from getActualValue)
public int compare(Object value1, Object value2) {
return -1;
}
// get the length of the value
// the parameters are in compiled form (from getActualValue)
public int getDataLength(Object value) {
return (value instanceof String) ? ((String)value).length() : -1;
}
// get the number of digits of the value
// the parameters are in compiled form (from getActualValue)
public int getTotalDigits(Object value) {
return -1;
}
// get the number of fraction digits of the value
// the parameters are in compiled form (from getActualValue)
public int getFractionDigits(Object value) {
return -1;
}
// check whether the character is in the range 0x30 ~ 0x39
public static final boolean isDigit(char ch) {
return ch >= '0' && ch <= '9';
}
// if the character is in the range 0x30 ~ 0x39, return its int value (0~9),
// otherwise, return -1
public static final int getDigit(char ch) {
return isDigit(ch) ? ch - '0' : -1;
}
} // interface TypeValidator