com.sun.labs.minion.retrieval.parser
Class WebTransformer

java.lang.Object
  com.sun.labs.minion.retrieval.parser.Transformer
      com.sun.labs.minion.retrieval.parser.WebTransformer

public class WebTransformer
extends Transformer

This class transforms the output of JavaCC into a tree of query elements that the query evaluator can understand. It's more than meets the eye.

Field Summary

protected static java.lang.String

validMods

Constructor Summary

WebTransformer()

Method Summary

static java.lang.String	getMods(java.lang.String term)
static boolean	isAnd(java.lang.String mods)
static boolean	isNot(java.lang.String mods)
static boolean	isOr(java.lang.String mods)
static void	main(java.lang.String[] args)
QueryElement	transformTree(SimpleNode root) Transforms an abstract syntax tree provided by JJTree+JavaCC into a tree of QueryElements that can be used by the query evaluator.
QueryElement	transformTree(SimpleNode root, int defaultOperator) Transforms an abstract syntax tree provided by JJTree+JavaCC into a tree of QueryElements that can be used by the query evaluator.

Methods inherited from class com.sun.labs.minion.retrieval.parser.Transformer

isDoubleQuoted, isQuoted, isSingleQuoted

Methods inherited from class java.lang.Object

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

Field Detail

validMods

protected static final java.lang.String validMods

See Also:

Constant Field Values

Constructor Detail

WebTransformer

public WebTransformer()

Method Detail

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Throws:

java.lang.Exception

transformTree

public QueryElement transformTree(SimpleNode root)
                           throws java.text.ParseException

Transforms an abstract syntax tree provided by JJTree+JavaCC into a tree of QueryElements that can be used by the query evaluator.

Specified by:

transformTree in class Transformer

Parameters:

root - the root node of the tree returned from the Parser

Returns:

the root node of a tree describing a query

Throws:

java.text.ParseException

transformTree

public QueryElement transformTree(SimpleNode root,
                                  int defaultOperator)
                           throws java.text.ParseException

Transforms an abstract syntax tree provided by JJTree+JavaCC into a tree of QueryElements that can be used by the query evaluator.

Specified by:

transformTree in class Transformer

Parameters:

root - the root node of the tree returned from the Parser

defaultOperator - specified the default operator to use when no other operator is provided between terms in the query. Valid values are defined in the Searcher interface

Returns:

the root node of a tree describing a query

Throws:

java.text.ParseException

isAnd

public static boolean isAnd(java.lang.String mods)

isNot

public static boolean isNot(java.lang.String mods)

isOr

public static boolean isOr(java.lang.String mods)

getMods

public static java.lang.String getMods(java.lang.String term)