edu.nyu.jet.pat

Class PatternCollection

java.lang.Object

edu.nyu.jet.pat.PatternCollection

public class PatternCollection
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
Vector	patternNames
Hashtable	patterns
Vector	patternSetNames
Hashtable	patternSets

Constructor Summary

Constructors

Constructor and Description
PatternCollection() creates an empty PatternCollection

Method Summary

Methods

Modifier and Type	Method and Description
void	apply(String patternSetName, Document doc) applies the rules in the named PatternSet to the document.
void	apply(String patternSetName, Document doc, Span span) applies the rules in the named PatternSet to the specified span.
PatternElement	dereference(String patternName) returns pattern named patternName, or null if no such pattern exists (alias for getPattern)
PatternElement	getPattern(String patternName) returns pattern named patternName, or null if no such pattern exists
PatternSet	getPatternSet(String patternSetName) returns pattern set named patternSetName, or null if no such pattern set exists
void	makePatternGraph() converts the set of rules in all pattern sets of this pattern collection into pattern graphs.
void	readPatternCollection(Reader reader) reads a file of pattern statements using reader and builds (or augments) a PatternCollection in the form of patterns and rules.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

patterns

public Hashtable patterns

patternSets

public Hashtable patternSets

patternNames

public Vector patternNames

patternSetNames

public Vector patternSetNames

Constructor Detail

PatternCollection

public PatternCollection()

creates an empty PatternCollection

Method Detail

readPatternCollection

public void readPatternCollection(Reader reader)
                           throws IOException

reads a file of pattern statements using reader and builds (or augments) a PatternCollection in the form of patterns and rules.

Throws:

IOException

getPattern

public PatternElement getPattern(String patternName)

returns pattern named patternName, or null if no such pattern exists

dereference

public PatternElement dereference(String patternName)

returns pattern named patternName, or null if no such pattern exists (alias for getPattern)

getPatternSet

public PatternSet getPatternSet(String patternSetName)

returns pattern set named patternSetName, or null if no such pattern set exists

makePatternGraph

public void makePatternGraph()

converts the set of rules in all pattern sets of this pattern collection into pattern graphs. Once the rules have been converted to graphs, they can be applied to a document using the apply method.

apply

public void apply(String patternSetName,
         Document doc)

applies the rules in the named PatternSet to the document. If no such pattern set exists, no action is performed.

apply

public void apply(String patternSetName,
         Document doc,
         Span span)

applies the rules in the named PatternSet to the specified span. If no such pattern set exists, no action is performed.