Package net.sf.saxon.type
Class Type
- java.lang.Object
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- net.sf.saxon.type.Type
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- All Implemented Interfaces:
java.io.Serializable
public abstract class Type extends java.lang.Object implements java.io.Serializable
This class contains static information about types and methods for constructing type codes. The class is never instantiated.The constant integers used for type names in earlier versions of this class have been replaced by constants in
StandardNames
. The constants representingAtomicType
objects are now available through theBuiltInAtomicType
class.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description static short
ATTRIBUTE
Item type representing an attribute node - attribute()static short
COMMENT
Item type representing a comment nodestatic short
DOCUMENT
Item type representing a document nodestatic short
ELEMENT
Type representing an element node - element()static short
EMPTY
Item type that matches no items (corresponds to SequenceType empty())static short
ITEM
An item type that matches any itemstatic ItemType
ITEM_TYPE
static short
MAX_NODE_TYPE
static short
NAMESPACE
Item type representing a namespace nodestatic short
NODE
An item type that matches any nodestatic ItemType
NODE_TYPE
static short
PARENT_POINTER
Dummy node kind used in the tiny tree to contain a parent pointerstatic short
PROCESSING_INSTRUCTION
Item type representing a processing-instruction nodestatic short
STOPPER
Dummy node kind used in the tiny tree to mark the end of the treestatic short
TEXT
Item type representing a text node - text()static short
WHITESPACE_TEXT
Item type representing a text node stored in the tiny tree as compressed whitespace
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static java.lang.String
displayTypeName(Item item)
Output (for diagnostics) a representation of the type of an item.static ItemType
getBuiltInItemType(java.lang.String namespace, java.lang.String localName)
Get the ItemType object for a built-in typestatic ItemType
getCommonSuperType(ItemType t1, ItemType t2, TypeHierarchy th)
Get a type that is a common supertype of two given item typesstatic ItemType
getItemType(Item item, TypeHierarchy th)
Get the ItemType of an Itemstatic boolean
isComparable(BuiltInAtomicType t1, BuiltInAtomicType t2, boolean ordered)
Determine whether two primitive atomic types are comparablestatic boolean
isNodeType(ItemType type)
Test whether a given type is (some subtype of) node()static boolean
isPrimitiveType(int code)
Determine whether this type is a primitive type.
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Field Detail
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ELEMENT
public static final short ELEMENT
Type representing an element node - element()- See Also:
- Constant Field Values
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ATTRIBUTE
public static final short ATTRIBUTE
Item type representing an attribute node - attribute()- See Also:
- Constant Field Values
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TEXT
public static final short TEXT
Item type representing a text node - text()- See Also:
- Constant Field Values
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WHITESPACE_TEXT
public static final short WHITESPACE_TEXT
Item type representing a text node stored in the tiny tree as compressed whitespace- See Also:
- Constant Field Values
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PROCESSING_INSTRUCTION
public static final short PROCESSING_INSTRUCTION
Item type representing a processing-instruction node- See Also:
- Constant Field Values
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COMMENT
public static final short COMMENT
Item type representing a comment node- See Also:
- Constant Field Values
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DOCUMENT
public static final short DOCUMENT
Item type representing a document node- See Also:
- Constant Field Values
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NAMESPACE
public static final short NAMESPACE
Item type representing a namespace node- See Also:
- Constant Field Values
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STOPPER
public static final short STOPPER
Dummy node kind used in the tiny tree to mark the end of the tree- See Also:
- Constant Field Values
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PARENT_POINTER
public static final short PARENT_POINTER
Dummy node kind used in the tiny tree to contain a parent pointer- See Also:
- Constant Field Values
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NODE
public static final short NODE
An item type that matches any node- See Also:
- Constant Field Values
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NODE_TYPE
public static final ItemType NODE_TYPE
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ITEM
public static final short ITEM
An item type that matches any item- See Also:
- Constant Field Values
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ITEM_TYPE
public static final ItemType ITEM_TYPE
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MAX_NODE_TYPE
public static final short MAX_NODE_TYPE
- See Also:
- Constant Field Values
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EMPTY
public static final short EMPTY
Item type that matches no items (corresponds to SequenceType empty())- See Also:
- Constant Field Values
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Method Detail
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isNodeType
public static boolean isNodeType(ItemType type)
Test whether a given type is (some subtype of) node()- Parameters:
type
- The type to be tested- Returns:
- true if the item type is node() or a subtype of node()
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getItemType
public static ItemType getItemType(Item item, TypeHierarchy th)
Get the ItemType of an Item- Parameters:
item
- the item whose type is requiredth
- the type hierarchy cache- Returns:
- the item type of the item
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displayTypeName
public static java.lang.String displayTypeName(Item item)
Output (for diagnostics) a representation of the type of an item. This does not have to be the most specific type- Parameters:
item
- the item whose type is to be displayed- Returns:
- a string representation of the type of the item
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getBuiltInItemType
public static ItemType getBuiltInItemType(java.lang.String namespace, java.lang.String localName)
Get the ItemType object for a built-in type- Parameters:
namespace
- the namespace URI of the typelocalName
- the local name of the type- Returns:
- the ItemType, or null if not found
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getCommonSuperType
public static ItemType getCommonSuperType(ItemType t1, ItemType t2, TypeHierarchy th)
Get a type that is a common supertype of two given item types- Parameters:
t1
- the first item typet2
- the second item typeth
- the type hierarchy cache- Returns:
- the item type that is a supertype of both the supplied item types
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isPrimitiveType
public static boolean isPrimitiveType(int code)
Determine whether this type is a primitive type. The primitive types are the 19 primitive types of XML Schema, plus xs:integer, xs:dayTimeDuration and xs:yearMonthDuration; xs:untypedAtomic; the 7 node kinds; and all supertypes of these (item(), node(), xs:anyAtomicType, xs:numeric, ...)- Parameters:
code
- the item type code to be tested- Returns:
- true if the type is considered primitive under the above rules
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isComparable
public static boolean isComparable(BuiltInAtomicType t1, BuiltInAtomicType t2, boolean ordered)
Determine whether two primitive atomic types are comparable- Parameters:
t1
- the first type to compared. This must be a primitive atomic type as defined byItemType.getPrimitiveType()
t2
- the second type to compared. This must be a primitive atomic type as defined byItemType.getPrimitiveType()
ordered
- true if testing for an ordering comparison (lt, gt, le, ge). False if testing for an equality comparison (eq, ne)- Returns:
- true if the types are comparable, as defined by the rules of the "eq" operator
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