Package net.sf.saxon.lib

Class ConversionRules

  • Direct Known Subclasses:
    ValidationContext
    public class ConversionRules
extends java.lang.Object
    This class defines a set of rules for converting between different atomic types. It handles the variations that arise between different versions of the W3C specifications, for example the changes in Name syntax between XML 1.0 and XML 1.1, the introduction of "+INF" as a permitted xs:double value in XSD 1.1, and so on.

    It is possible to nominate a customized ConversionRules object at the level of the Configuration, either by instantiating this class and changing the properties, or by subclassing.

    Since:
    9.3
    See Also:
    Configuration.setConversionRules(ConversionRules)

    • Field Detail

      • DEFAULT

        public static final ConversionRules DEFAULT
        Default conversion rules. Changed in Saxon 9.9 so these are the XSD 1.1 rules (year zero allowed in dates, -INF allowed in xs:double). Modifying the default conversion rules is inadvisable, but it could potentially be done in order to retain compatibility with earlier Saxon releases.

    • Constructor Detail

      • ConversionRules

        public ConversionRules()

    • Method Detail

      • copy

        public ConversionRules copy()
        Create a copy of these conversion rules.
        Returns:
        a copy of the rules. The cache of converters is NOT copied (because changes to the conversion rules would invalidate the cache)

      • copyTo

        public void copyTo​(ConversionRules cr)
        Create a copy of these conversion rules.
        Parameters:
        cr - a ConversionRules object which will be updated to hold a copy of the rules. The cache of converters is NOT copied (because changes to the conversion rules would invalidate the cache)

      • setTypeHierarchy

        public void setTypeHierarchy​(TypeHierarchy typeHierarchy)

      • setStringToDoubleConverter

        public void setStringToDoubleConverter​(StringToDouble converter)
        Set the converter that will be used for converting strings to doubles and floats.
        Parameters:
        converter - the converter to be used. There are two converters in regular use: they differ only in whether the lexical value "+INF" is recognized as a representation of positive infinity.

      • getStringToDoubleConverter

        public StringToDouble getStringToDoubleConverter()
        Get the converter that will be used for converting strings to doubles and floats.
        Returns:
        the converter to be used. There are two converters in regular use: they differ only in whether the lexical value "+INF" is recognized as a representation of positive infinity.

      • setNotationSet

        public void setNotationSet​(NotationSet notations)
        Specify the set of notations that are accepted by xs:NOTATION and its subclasses. This is to support the rule that for a notation to be valid, it must be declared in an xs:notation declaration in the schema
        Parameters:
        notations - the set of notations that are recognized; or null, to indicate that all notation names are accepted

      • isDeclaredNotation

        public boolean isDeclaredNotation​(java.lang.String uri,
                                  java.lang.String local)
        Ask whether a given notation is accepted by xs:NOTATION and its subclasses. This is to support the rule that for a notation to be valid, it must be declared in an xs:notation declaration in the schema
        Parameters:
        uri - the namespace URI of the notation
        local - the local part of the name of the notation
        Returns:
        true if the notation is in the set of recognized notation names

      • setURIChecker

        public void setURIChecker​(URIChecker checker)
        Set the class to be used for checking URI values. By default, no checking takes place.
        Parameters:
        checker - an object to be used for checking URIs; or null if any string is accepted as an anyURI value

      • isValidURI

        public boolean isValidURI​(java.lang.String str)
        Ask whether a string is a valid instance of xs:anyURI according to the rules defined by the current URIChecker
        Parameters:
        str - the string to be checked against the rules for URIs
        Returns:
        true if the string represents a valid xs:anyURI value

      • setAllowYearZero

        public void setAllowYearZero​(boolean allowed)
        Say whether year zero is permitted in dates. By default it is not permitted when XSD 1.0 is in use, but it is permitted when XSD 1.1 is used.
        Parameters:
        allowed - true if year zero is permitted

      • isAllowYearZero

        public boolean isAllowYearZero()
        Ask whether year zero is permitted in dates. By default it is not permitted when XSD 1.0 is in use, but it is permitted when XSD 1.1 is used.
        Returns:
        true if year zero is permitted

      • getConverter

        public Converter getConverter​(AtomicType source,
                              AtomicType target)
        Get a Converter for a given pair of atomic types. These can be primitive types, derived types, or user-defined types. The converter implements the casting rules.
        Parameters:
        source - the source type
        target - the target type
        Returns:
        a Converter if conversion between the two types is possible; or null otherwise

      • makeStringConverter

        public StringConverter makeStringConverter​(AtomicType targetType)
        Static factory method to get a StringConverter for a specific target type
        Parameters:
        targetType - the target type of the conversion
        Returns:
        a StringConverter that can be used to convert strings to the target type, or to validate strings against the target type