Package net.sf.saxon.java
Class JDK15RegexTranslator
- java.lang.Object
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- net.sf.saxon.regex.RegexTranslator
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- net.sf.saxon.java.JDK15RegexTranslator
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public class JDK15RegexTranslator extends RegexTranslator
This class translates XML Schema regex syntax into JDK 1.5 regex syntax. This differs from the JDK 1.4 translator because JDK 1.5 handles non-BMP characters (wide characters) in places where JDK 1.4 does not, for example in a range such as [X-Y]. This enables much of the code from the 1.4 translator to be removed. 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 also removes most of the complexities of handling non-BMP characters, since JDK 1.5 handles these natively.
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Nested Class Summary
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Nested classes/interfaces inherited from class net.sf.saxon.regex.RegexTranslator
RegexTranslator.Range
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Field Summary
Fields Modifier and Type Field Description static net.sf.saxon.java.JDK15RegexTranslator.CharClass[]
categoryCharClasses
Translates XML Schema and XPath regexes intojava.util.regex
regexes.static net.sf.saxon.java.JDK15RegexTranslator.CharClass[]
specialBlockCharClasses
CharClass for each block name in specialBlockNames.static net.sf.saxon.java.JDK15RegexTranslator.CharClass[]
subCategoryCharClasses
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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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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static void
main(java.lang.String[] args)
Main method for testing.static java.lang.String
translate(java.lang.CharSequence regExp, int xmlVersion, boolean xpath, boolean ignoreWhitespace, boolean caseBlind)
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
translateAtom()
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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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Field Detail
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categoryCharClasses
public static final net.sf.saxon.java.JDK15RegexTranslator.CharClass[] categoryCharClasses
Translates XML Schema and XPath regexes intojava.util.regex
regexes.- See Also:
Pattern
, XML Schema Part 2
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subCategoryCharClasses
public static final net.sf.saxon.java.JDK15RegexTranslator.CharClass[] subCategoryCharClasses
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specialBlockCharClasses
public static final net.sf.saxon.java.JDK15RegexTranslator.CharClass[] specialBlockCharClasses
CharClass for each block name in specialBlockNames.
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Method Detail
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translate
public static java.lang.String translate(java.lang.CharSequence regExp, int xmlVersion, boolean xpath, boolean ignoreWhitespace, boolean caseBlind) 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:
xmlVersion
- set toConfiguration.XML10
for XML 1.0 orConfiguration.XML11
for XML 1.1regExp
- a String containing a regular expression in the syntax of XML Schemas Part 2xpath
- a boolean indicating whether the XPath 2.0 F+O extensions to the schema regex syntax are permittedignoreWhitespace
- true if whitespace is to be ignored ('x' flag)caseBlind
- true if case is to be ignored ('i' flag)- Returns:
- a JDK 1.5 regular expression
- Throws:
RegexSyntaxException
- ifregexp
is not a regular expression in the syntax of XML Schemas Part 2, or XPath 2.0, as appropriate- See Also:
Pattern
, XML Schema Part 2
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translateAtom
protected boolean translateAtom() throws RegexSyntaxException
- Specified by:
translateAtom
in classRegexTranslator
- Throws:
RegexSyntaxException
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main
public static void main(java.lang.String[] args) throws RegexSyntaxException
Main method for testing. Outputs to System.err the Java translation of a supplied regular expression- Parameters:
args
- command line arguments arg[0] a regular expression arg[1] = xpath to invoke the XPath rules- Throws:
RegexSyntaxException
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