Package net.sf.saxon.java
Class JDK14RegexTranslator
java.lang.Object
net.sf.saxon.regex.RegexTranslator
net.sf.saxon.regex.SurrogateRegexTranslator
net.sf.saxon.java.JDK14RegexTranslator
This class translates XML Schema regex syntax into JDK 1.4 regex syntax.
Author: James Clark, Thai Open Source Software Center Ltd. See statement at end of file.
Modified by Michael Kay (a) to integrate the code into Saxon, and (b) to support XPath additions
to the XML Schema regex syntax.
This version of the regular expression translator treats each half of a surrogate pair as a separate
character, translating anything in an XPath regex that can match a non-BMP character into a Java
regex that matches the two halves of a surrogate pair independently. This approach doesn't work
under JDK 1.5, whose regex engine treats a surrogate pair as a single character.
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Nested Class Summary
Nested classes/interfaces inherited from class net.sf.saxon.regex.SurrogateRegexTranslator
SurrogateRegexTranslator.BackReference, SurrogateRegexTranslator.CharClass, SurrogateRegexTranslator.CharRange, SurrogateRegexTranslator.Complement, SurrogateRegexTranslator.Dot, SurrogateRegexTranslator.Empty, SurrogateRegexTranslator.Property, SurrogateRegexTranslator.SimpleCharClass, SurrogateRegexTranslator.SingleChar, SurrogateRegexTranslator.WideSingleChar
Nested classes/interfaces inherited from class net.sf.saxon.regex.RegexTranslator
RegexTranslator.Range
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Field Summary
Fields inherited from class net.sf.saxon.regex.SurrogateRegexTranslator
categoryCharClasses, subCategoryCharClasses
Fields inherited from class net.sf.saxon.regex.RegexTranslator
ALL, captures, caseBlind, curChar, currentCapture, eos, ignoreWhitespace, inCharClassExpr, isXPath, length, NONE, NOT_ALLOWED_CLASS, pos, regExp, result, SOME, SURROGATES1_CLASS, SURROGATES2_CLASS, xmlVersion
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic void
Diagnostic entry pointvoid
setIgnoreWhitespace
(boolean ignore) Indicate whether whitespace should be ignoredtranslate
(CharSequence regExp, int xmlVersion, boolean xpath) Translates a regular expression in the syntax of XML Schemas Part 2 into a regular expression in the syntax ofjava.util.regex.Pattern
.protected boolean
Methods inherited from class net.sf.saxon.regex.RegexTranslator
absorbSurrogatePair, advance, copyCurChar, expect, highSurrogateRanges, isAsciiAlnum, isBlock, isJavaMetaChar, lowSurrogateRanges, makeException, makeException, parseQuantExact, recede, sortRangeList, translateBranch, translateQuantifier, translateQuantity, translateRegExp, translateTop
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Constructor Details
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JDK14RegexTranslator
public JDK14RegexTranslator()Create a regex translator for JDK 1.4
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Method Details
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setIgnoreWhitespace
public void setIgnoreWhitespace(boolean ignore) Indicate whether whitespace should be ignored- Parameters:
ignore
- true if whitespace should be ignored
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translate
public String translate(CharSequence regExp, int xmlVersion, boolean xpath) throws RegexSyntaxException Translates a regular expression in the syntax of XML Schemas Part 2 into a regular expression in the syntax ofjava.util.regex.Pattern
. The translation assumes that the string to be matched against the regex uses surrogate pairs correctly. If the string comes from XML content, a conforming XML parser will automatically check this; if the string comes from elsewhere, it may be necessary to check surrogate usage before matching.- Parameters:
regExp
- a String containing a regular expression in the syntax of XML Schemas Part 2xmlVersion
- integer constant indicating XML 1.0 or XML 1.1xpath
- a boolean indicating whether the XPath 2.0 F+O extensions to the schema regex syntax are permitted- Returns:
- a String containing a regular expression in the syntax of java.util.regex.Pattern
- Throws:
RegexSyntaxException
- ifregexp
is not a regular expression in the syntax of XML Schemas Part 2, or XPath 2.0, as appropriate- See Also:
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translateAtom
- Specified by:
translateAtom
in classRegexTranslator
- Throws:
RegexSyntaxException
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main
Diagnostic entry point- Parameters:
args
- argument 1 - XPath regex; argument 2 - xpath|xmlschema- Throws:
RegexSyntaxException
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