net.sf.saxon.value
Class Base64BinaryValue

java.lang.Object
  extended by net.sf.saxon.value.Value
      extended by net.sf.saxon.value.AtomicValue
          extended by net.sf.saxon.value.Base64BinaryValue
All Implemented Interfaces:
Serializable, PullEvent, SequenceIterable, GroundedValue, Item, ValueRepresentation, ConversionResult

public class Base64BinaryValue
extends AtomicValue

A value of type xs:base64Binary

See Also:
Serialized Form

Field Summary
 
Fields inherited from class net.sf.saxon.value.Value
EMPTY_CLASS_ARRAY, INDETERMINATE_ORDERING
 
Fields inherited from interface net.sf.saxon.om.ValueRepresentation
EMPTY_VALUE_ARRAY
 
Fields inherited from interface net.sf.saxon.om.ValueRepresentation
EMPTY_VALUE_ARRAY
 
Constructor Summary
Base64BinaryValue(byte[] value)
          Constructor: create a base64Binary value from a given array of bytes
Base64BinaryValue(CharSequence s)
          Constructor: create a base64Binary value from a supplied string in base64 encoding
Base64BinaryValue(CharSequence s, AtomicType type)
          Constructor: create a base64Binary value from a supplied string in base64 encoding, with a specified type.
 
Method Summary
 ConversionResult convertPrimitive(BuiltInAtomicType requiredType, boolean validate, XPathContext context)
          Convert to target data type
 Object convertToJava(Class target, XPathContext context)
          Convert to Java object (for passing to external functions)
 AtomicValue copyAsSubType(AtomicType typeLabel)
          Create a copy of this atomic value (usually so that the type label can be changed).
 boolean equals(Object other)
          Test if the two base64Binary values are equal.
 byte[] getBinaryValue()
          Get the binary value
 int getLengthInOctets()
          Get the number of octets in the value
 BuiltInAtomicType getPrimitiveType()
          Determine the primitive type of the value.
 Comparable getSchemaComparable()
          Support XML Schema comparison semantics
 String getStringValue()
          Convert to string
 Object getXPathComparable(boolean ordered, StringCollator collator, XPathContext context)
          Get an object value that implements the XPath equality and ordering comparison semantics for this value.
 int hashCode()
           
 
Methods inherited from class net.sf.saxon.value.AtomicValue
asAtomic, checkPermittedContents, convert, convert, effectiveBooleanValue, getCardinality, getComponent, getItemType, getLength, getStringValueCS, getTypedValue, getTypeLabel, isNaN, itemAt, iterate, process, setTypeLabel, subsequence, toString
 
Methods inherited from class net.sf.saxon.value.Value
asItem, asItem, asIterator, asValue, convertJavaObjectToXPath, convertToJava, fromItem, getCanonicalLexicalRepresentation, getIterator, iterate, makeQNameValue, reduce, stringToNumber
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
 

Constructor Detail

Base64BinaryValue

public Base64BinaryValue(CharSequence s)
                  throws XPathException
Constructor: create a base64Binary value from a supplied string in base64 encoding

Parameters:
s - the lexical representation of the base64 binary value. There is no requirement that whitespace should already be collapsed.
Throws:
XPathException

Base64BinaryValue

public Base64BinaryValue(CharSequence s,
                         AtomicType type)
Constructor: create a base64Binary value from a supplied string in base64 encoding, with a specified type. This method throws no checked exceptions; the caller is expected to ensure that the string is a valid Base64 lexical representation, that it conforms to the specified type, and that the type is indeed a subtype of xs:base64Binary. An unchecked exception such as an IllegalArgumentException may be thrown if these conditions are not satisfied, but this is not guaranteed.

Parameters:
s - the value in base64 encoding
type - the atomic type. This must be xs:base64binary or a subtype.

Base64BinaryValue

public Base64BinaryValue(byte[] value)
Constructor: create a base64Binary value from a given array of bytes

Parameters:
value - array of bytes holding the octet sequence
Method Detail

copyAsSubType

public AtomicValue copyAsSubType(AtomicType typeLabel)
Create a copy of this atomic value (usually so that the type label can be changed). The type label of the copy will be reset to the primitive type.

Specified by:
copyAsSubType in class AtomicValue
Parameters:
typeLabel - the type label to be attached to the value, a subtype of xs:base64Binary
Returns:
the copied value

getBinaryValue

public byte[] getBinaryValue()
Get the binary value

Returns:
the octet sequence that is the typed value

getPrimitiveType

public BuiltInAtomicType getPrimitiveType()
Description copied from class: AtomicValue
Determine the primitive type of the value. This delivers the same answer as getItemType().getPrimitiveItemType(). The primitive types are the 19 primitive types of XML Schema, plus xs:integer, xs:dayTimeDuration and xs:yearMonthDuration, and xs:untypedAtomic. For external objects, the result is xs:anyAtomicType.

Specified by:
getPrimitiveType in class AtomicValue
Returns:
the primitive type

convertPrimitive

public ConversionResult convertPrimitive(BuiltInAtomicType requiredType,
                                         boolean validate,
                                         XPathContext context)
Convert to target data type

Parameters:
requiredType - an integer identifying the required atomic type
context - the XPath dynamic evaluation context
validate - true if validation is required. If set to false, the caller guarantees that the value is valid for the target data type, and that further validation is therefore not required. Note that a validation failure may be reported even if validation was not requested.
Returns:
an AtomicValue, a value of the required type; or an ErrorValue

getStringValue

public String getStringValue()
Convert to string

Specified by:
getStringValue in interface Item
Specified by:
getStringValue in interface ValueRepresentation
Specified by:
getStringValue in class AtomicValue
Returns:
the canonical representation.
See Also:
Item.getStringValueCS()

getLengthInOctets

public int getLengthInOctets()
Get the number of octets in the value

Returns:
the number of octets

convertToJava

public Object convertToJava(Class target,
                            XPathContext context)
                     throws XPathException
Convert to Java object (for passing to external functions)

Overrides:
convertToJava in class Value
Parameters:
target - the required target class
context - the XPath dynamic evaluation context
Returns:
the (boxed) Java object that best represents the XPath value
Throws:
XPathException

getSchemaComparable

public Comparable getSchemaComparable()
Support XML Schema comparison semantics

Specified by:
getSchemaComparable in class AtomicValue
Returns:
a Comparable that follows XML Schema comparison rules

getXPathComparable

public Object getXPathComparable(boolean ordered,
                                 StringCollator collator,
                                 XPathContext context)
Get an object value that implements the XPath equality and ordering comparison semantics for this value. If the ordered parameter is set to true, the result will be a Comparable and will support a compareTo() method with the semantics of the XPath lt/gt operator, provided that the other operand is also obtained using the getXPathComparable() method. In all cases the result will support equals() and hashCode() methods that support the semantics of the XPath eq operator, again provided that the other operand is also obtained using the getXPathComparable() method. A context argument is supplied for use in cases where the comparison semantics are context-sensitive, for example where they depend on the implicit timezone or the default collation.

Specified by:
getXPathComparable in class AtomicValue
Parameters:
ordered - true if an ordered comparison is required. In this case the result is null if the type is unordered; in other cases the returned value will be a Comparable.
collator -
context - the XPath dynamic evaluation context, used in cases where the comparison is context sensitive @return an Object whose equals() and hashCode() methods implement the XPath comparison semantics with respect to this atomic value. If ordered is specified, the result will either be null if no ordering is defined, or will be a Comparable
Returns:
an Object whose equals() and hashCode() methods implement the XPath comparison semantics with respect to this atomic value. If ordered is specified, the result will either be null if no ordering is defined, or will be a Comparable

equals

public boolean equals(Object other)
Test if the two base64Binary values are equal.

Specified by:
equals in class AtomicValue
Parameters:
other - the other value
Returns:
true if the other operand is an atomic value and the two values are equal as defined by the XPath eq operator

hashCode

public int hashCode()
Overrides:
hashCode in class Object


Copyright (C) Michael H. Kay. All rights reserved.