Package org.apache.tools.ant.filters
Class BaseFilterReader
java.lang.Object
java.io.Reader
java.io.FilterReader
org.apache.tools.ant.filters.BaseFilterReader
- All Implemented Interfaces:
Closeable,AutoCloseable,Readable
- Direct Known Subclasses:
BaseParamFilterReader,ClassConstants,ExpandProperties,StripJavaComments,TokenFilter
Base class for core filter readers.
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Field Summary
Fields inherited from class java.io.FilterReader
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Constructor Summary
ConstructorsConstructorDescriptionConstructor used by Ant's introspection mechanism.Creates a new filtered reader. -
Method Summary
Modifier and TypeMethodDescriptionprotected final booleanReturns the initialized status.protected final ProjectReturns the project this filter is part of.final intread(char[] cbuf, int off, int len) Reads characters into a portion of an array.protected final StringReads to the end of the stream, returning the contents as a String.protected final StringreadLine()Reads a line of text ending with '\n' (or until the end of the stream).protected final voidsetInitialized(boolean initialized) Sets the initialized status.final voidsetProject(Project project) Sets the project to work with.final longskip(long n) Skips characters.Methods inherited from class java.io.FilterReader
close, mark, markSupported, read, ready, resetMethods inherited from class java.io.Reader
nullReader, read, read, transferTo
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Constructor Details
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BaseFilterReader
public BaseFilterReader()Constructor used by Ant's introspection mechanism. The original filter reader is only used for chaining purposes, never for filtering purposes (and indeed it would be useless for filtering purposes, as it has no real data to filter). ChainedReaderHelper uses this placeholder instance to create a chain of real filters. -
BaseFilterReader
Creates a new filtered reader.- Parameters:
in- A Reader object providing the underlying stream. Must not benull.
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Method Details
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read
Reads characters into a portion of an array. This method will block until some input is available, an I/O error occurs, or the end of the stream is reached.- Overrides:
readin classFilterReader- Parameters:
cbuf- Destination buffer to write characters to. Must not benull.off- Offset at which to start storing characters.len- Maximum number of characters to read.- Returns:
- the number of characters read, or -1 if the end of the stream has been reached
- Throws:
IOException- If an I/O error occurs
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skip
Skips characters. This method will block until some characters are available, an I/O error occurs, or the end of the stream is reached.- Overrides:
skipin classFilterReader- Parameters:
n- The number of characters to skip- Returns:
- the number of characters actually skipped
- Throws:
IllegalArgumentException- Ifnis negative.IOException- If an I/O error occurs
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setInitialized
protected final void setInitialized(boolean initialized) Sets the initialized status.- Parameters:
initialized- Whether or not the filter is initialized.
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getInitialized
protected final boolean getInitialized()Returns the initialized status.- Returns:
- whether or not the filter is initialized
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setProject
Sets the project to work with.- Parameters:
project- The project this filter is part of. Should not benull.
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getProject
Returns the project this filter is part of.- Returns:
- the project this filter is part of
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readLine
Reads a line of text ending with '\n' (or until the end of the stream). The returned String retains the '\n'.- Returns:
- the line read, or
nullif the end of the stream has already been reached - Throws:
IOException- if the underlying reader throws one during reading
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readFully
Reads to the end of the stream, returning the contents as a String.- Returns:
- the remaining contents of the reader, as a String
- Throws:
IOException- if the underlying reader throws one during reading
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