Package net.sf.saxon.pattern
Class NodeTestPattern
- java.lang.Object
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- net.sf.saxon.expr.Expression
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- net.sf.saxon.expr.PseudoExpression
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- net.sf.saxon.pattern.Pattern
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- net.sf.saxon.pattern.NodeTestPattern
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- All Implemented Interfaces:
ExportAgent,Locatable,IdentityComparable,Traceable
public class NodeTestPattern extends Pattern
A NodeTestPattern is a pattern that consists simply of a NodeTest
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Field Summary
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Fields inherited from class net.sf.saxon.expr.Expression
EFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, ITEM_FEED_METHOD, ITERATE_METHOD, MAX_COST, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, PROCESS_METHOD, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, UPDATE_METHOD, WATCH_METHOD
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Constructor Summary
Constructors Constructor Description NodeTestPattern(NodeTest test)Create an NodeTestPattern that matches all items of a given type
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description intcomputeHashCode()Hashcode supporting equals()PatternconvertToTypedPattern(java.lang.String val)Convert the pattern to a typed pattern, in which an element name is treated as schema-element(N)Patterncopy(RebindingMap rebindings)Copy a pattern.booleanequals(java.lang.Object other)Determine whether this pattern is the same as another patternvoidexport(ExpressionPresenter presenter)Diagnostic print of expression structure.intgetFingerprint()Determine the name fingerprint of nodes to which this pattern applies.NodeTestgetItemType()Get a NodeTest that all the nodes matching this pattern must satisfyNodeTestgetNodeTest()UTypegetUType()Get a UType indicating which kinds of items this Pattern can match.booleanmatches(Item item, XPathContext context)Determine whether this Pattern matches the given Node.java.lang.Stringreconstruct()Display the pattern for diagnosticsjava.lang.StringtoShortString()Produce a short string identifying the expression for use in error messages-
Methods inherited from class net.sf.saxon.pattern.Pattern
allocateSlots, bindCurrent, effectiveBooleanValue, getDefaultPriority, getDependencies, getHostLanguage, getOriginalText, handleDynamicError, isLiftable, isMotionless, isRecoverable, make, matchesBeneathAnchor, matchesCurrentGroup, optimize, patternContainsVariable, replaceCurrent, selectNodes, setOriginalText, setPriority, setRecoverable, simplify, toPattern, toString, typeCheck
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Methods inherited from class net.sf.saxon.expr.PseudoExpression
computeCardinality, evaluateAsString, evaluateItem, getImplementationMethod, iterate, process
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Methods inherited from class net.sf.saxon.expr.Expression
addToPathMap, adoptChildExpression, allowExtractingCommonSubexpressions, checkedOperands, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeSpecialProperties, computeStaticProperties, dynamicError, evaluatePendingUpdates, explain, getCardinality, getConfiguration, getCost, getEvaluationMethod, getExpressionName, getExtraProperty, getIntegerBounds, getInterpretedExpression, getIntrinsicDependencies, getLocalRetainedStaticContext, getLocation, getNetCost, getObjectName, getPackageData, getParentExpression, getProperties, getProperty, getRetainedStaticContext, getScopingExpression, getSlotsUsed, getSpecialProperties, getStaticBaseURI, getStaticBaseURIString, getStaticType, getStaticUType, getStreamerName, getTracingTag, hasCompatibleStaticContext, hashCode, hasSpecialProperty, hasVariableBinding, identityHashCode, implementsStaticTypeCheck, isCallOn, isEqual, isIdentical, isInstruction, isMultiThreaded, isStaticPropertiesKnown, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, markTailFunctionCalls, operandList, operands, operandSparseList, optimizeChildren, prepareForStreaming, resetLocalStaticProperties, restoreParentPointers, setEvaluationMethod, setExtraProperty, setFiltered, setFlattened, setLocation, setParentExpression, setRetainedStaticContext, setRetainedStaticContextLocally, setRetainedStaticContextThoroughly, setStaticProperty, simplifyChildren, staticTypeCheck, suppressValidation, typeCheckChildren, typeError, unordered, verifyParentPointers
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Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface net.sf.saxon.trace.Traceable
gatherProperties
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Constructor Detail
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NodeTestPattern
public NodeTestPattern(NodeTest test)
Create an NodeTestPattern that matches all items of a given type- Parameters:
test- the type that the items must satisfy for the pattern to match
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Method Detail
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matches
public boolean matches(Item item, XPathContext context)
Determine whether this Pattern matches the given Node. This is the main external interface for matching patterns: it sets current() to the node being tested
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getItemType
public NodeTest getItemType()
Get a NodeTest that all the nodes matching this pattern must satisfy- Specified by:
getItemTypein classPattern- Returns:
- an ItemType, as specific as possible, which all the matching items satisfy
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getUType
public UType getUType()
Get a UType indicating which kinds of items this Pattern can match.
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getFingerprint
public int getFingerprint()
Determine the name fingerprint of nodes to which this pattern applies. Used for optimisation.- Overrides:
getFingerprintin classPattern- Returns:
- A fingerprint that the nodes must match, or -1 if it can match multiple fingerprints
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reconstruct
public java.lang.String reconstruct()
Display the pattern for diagnostics- Overrides:
reconstructin classPattern
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toShortString
public java.lang.String toShortString()
Description copied from class:ExpressionProduce a short string identifying the expression for use in error messages- Overrides:
toShortStringin classPattern- Returns:
- a short string, sufficient to identify the expression
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equals
public boolean equals(java.lang.Object other)
Determine whether this pattern is the same as another pattern- Overrides:
equalsin classExpression- Parameters:
other- the other object- Returns:
- true if the other operand is an expression and if it can be determined that the two expressions are equivalent, in the sense that they will always return the same result.
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computeHashCode
public int computeHashCode()
Hashcode supporting equals()- Overrides:
computeHashCodein classExpression- Returns:
- a computed hash code
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convertToTypedPattern
public Pattern convertToTypedPattern(java.lang.String val) throws XPathException
Convert the pattern to a typed pattern, in which an element name is treated as schema-element(N)- Overrides:
convertToTypedPatternin classPattern- Parameters:
val- either "strict" or "lax" depending on the value of xsl:mode/@typed- Returns:
- either the original pattern unchanged, or a new pattern as the result of the conversion
- Throws:
XPathException- if the pattern cannot be converted
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export
public void export(ExpressionPresenter presenter) throws XPathException
Description copied from class:ExpressionDiagnostic print of expression structure. The abstract expression tree is written to the supplied output destination.- Specified by:
exportin interfaceExportAgent- Specified by:
exportin classPattern- Parameters:
presenter- the expression presenter used to display the structure- Throws:
XPathException- if the export fails, for example if an expression is found that won't work in the target environment.
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copy
public Pattern copy(RebindingMap rebindings)
Copy a pattern. This makes a deep copy.
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getNodeTest
public NodeTest getNodeTest()
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