Class Scanner
String
objects.-
Field Summary
FieldsModifier and TypeFieldDescriptionstatic final String
If the source code is not read from a file, debuggers have a hard time locating the source file for source-level debugging.static final String
Setting this system property to 'true' enables source-level debugging.static final String
If set to "true", then the temporary source code files are not deleted on exit. -
Constructor Summary
ConstructorsConstructorDescriptionDeprecated.This method is deprecated because it leaves the input file openDeprecated.This method is deprecated because it leaves the input file openDeprecated.This method is deprecated because it leaves the input file openScanner
(String fileName, InputStream is) Sets up a scanner that reads tokens from the givenInputStream
in the platform default encoding.Scanner
(String fileName, InputStream is, String encoding) Sets up a scanner that reads tokens from the givenInputStream
with the given encoding (null
means platform default encoding).Sets up a scanner that reads tokens from the givenReader
.Creates aScanner
that counts lines and columns from non-default initial values.Deprecated.This method is deprecated because it leaves the input file open -
Method Summary
Modifier and TypeMethodDescriptionvoid
close()
Deprecated.This method is deprecated, because the concept described above is confusing.location()
produce()
Produces and returns the next token.void
setIgnoreWhiteSpace
(boolean value) If value istrue
, then white space in the input stream is ignored, rather than scanned as aTokenType.WHITE_SPACE
token.
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Field Details
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SYSTEM_PROPERTY_SOURCE_DEBUGGING_ENABLE
Setting this system property to 'true' enables source-level debugging. Typically, this means that compilation is executed with "-g:all
" instead of "-g:none
".- See Also:
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SYSTEM_PROPERTY_SOURCE_DEBUGGING_DIR
If the source code is not read from a file, debuggers have a hard time locating the source file for source-level debugging. As a workaround, a copy of the source code is written to a temporary file, which must be included in the debugger's source path. If this system property is set, the temporary source file is created in that directory, otherwise in the default temporary-file directory.- See Also:
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SYSTEM_PROPERTY_SOURCE_DEBUGGING_KEEP
If set to "true", then the temporary source code files are not deleted on exit. That may be useful to interpret stack traces offline.- See Also:
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Constructor Details
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Scanner
Deprecated.This method is deprecated because it leaves the input file open- Throws:
IOException
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Scanner
Deprecated.This method is deprecated because it leaves the input file open- Throws:
IOException
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Scanner
Deprecated.This method is deprecated because it leaves the input file open- Throws:
IOException
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Scanner
Deprecated.This method is deprecated because it leaves the input file open- Throws:
IOException
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Scanner
Sets up a scanner that reads tokens from the givenInputStream
in the platform default encoding.The fileName is solely used for reporting in thrown exceptions.
- Throws:
IOException
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Scanner
public Scanner(@Nullable String fileName, InputStream is, @Nullable String encoding) throws IOException Sets up a scanner that reads tokens from the givenInputStream
with the given encoding (null
means platform default encoding).The fileName is used for reporting errors during compilation and for source level debugging, and should name an existing file. If
null
is passed, and the system propertyorg.codehaus.janino.source_debugging.enable
is set to "true", then a temporary file inorg.codehaus.janino.source_debugging.dir
or the system's default temp dir is created in order to make the source code available to a debugger.- Throws:
IOException
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Scanner
Sets up a scanner that reads tokens from the givenReader
.The fileName is used for reporting errors during compilation and for source level debugging, and should name an existing file. If
null
is passed, and the system propertyorg.codehaus.janino.source_debugging.enable
is set to "true", then a temporary file inorg.codehaus.janino.source_debugging.dir
or the system's default temp dir is created in order to make the source code available to a debugger.- Throws:
IOException
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Scanner
public Scanner(@Nullable String fileName, Reader in, int initialLineNumber, int initialColumnNumber) throws IOException Creates aScanner
that counts lines and columns from non-default initial values.- Throws:
IOException
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Method Details
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setIgnoreWhiteSpace
public void setIgnoreWhiteSpace(boolean value) If value istrue
, then white space in the input stream is ignored, rather than scanned as aTokenType.WHITE_SPACE
token. Since white space is typically quite numerous, this optimization may save considerable overhead. -
getFileName
- Returns:
- The file name optionally passed to the constructor
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close
Deprecated.This method is deprecated, because the concept described above is confusing. An application should close the underlyingInputStream
orReader
itselfCloses the character source (file,InputStream
,Reader
) associated with this object. The results of future calls toproduce()
are undefined.- Throws:
IOException
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location
- Returns:
- The
Location
of the previously read (or peeked) token.
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produce
Produces and returns the next token. Notice that end-of-input is not signalized with anull
product, but by anTokenType.END_OF_INPUT
-type token.- Throws:
CompileException
IOException
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