org.graalvm.shadowed.com.ibm.icu.impl.data

Class ResourceReader

java.lang.Object

org.graalvm.shadowed.com.ibm.icu.impl.data.ResourceReader

All Implemented Interfaces:

Closeable, AutoCloseable

public class ResourceReader
extends Object
implements Closeable

A reader for text resource data in the current package or the package of a given class object. The resource data is loaded through the class loader, so it will typically be a file in the same directory as the *.class files, or a file within a JAR file in the corresponding subdirectory. The file must be a text file in one of the supported encodings; when the resource is opened by constructing a ResourceReader object the encoding is specified.

2015-sep-03 TODO: Only used in org.graalvm.shadowed.com.ibm.icu.dev.test.format, move there.

Constructor Summary

Constructors

Constructor and Description
ResourceReader(Class<?> rootClass, String resourceName) Construct a reader object for the text file of the given name in the given class's package, using the default encoding.
ResourceReader(Class<?> rootClass, String resourceName, String encoding) Construct a reader object for the text file of the given name in the given class's package, using the given encoding.
ResourceReader(InputStream is, String resourceName) Construct a reader object for the input stream associated with the given resource name.
ResourceReader(InputStream is, String resourceName, String encoding) Construct a reader object for the input stream associated with the given resource name.
ResourceReader(String resourceName) Construct a reader object for the text file of the given name in this package, using the default encoding.
ResourceReader(String resourceName, String encoding) Construct a reader object for the text file of the given name in this package, using the given encoding.

Method Summary

Modifier and Type	Method and Description
void	close() Closes the underlying reader and releases any system resources associated with it.
String	describePosition() Return a string description of the position of the last line returned by readLine() or readLineSkippingComments().
int	getLineNumber() Return the one-based line number of the last line returned by readLine() or readLineSkippingComments().
String	readLine() Read and return the next line of the file or null if the end of the file has been reached.
String	readLineSkippingComments() Read a line, ignoring blank lines and lines that start with '#'.
String	readLineSkippingComments(boolean trim) Read a line, ignoring blank lines and lines that start with '#'.
void	reset() Reset this reader so that the next call to readLine() returns the first line of the file again.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResourceReader

public ResourceReader(String resourceName,
                      String encoding)
               throws UnsupportedEncodingException

Construct a reader object for the text file of the given name in this package, using the given encoding.

Parameters:

resourceName - the name of the text file located in this package's ".data" subpackage.

encoding - the encoding of the text file; if unsupported an exception is thrown

Throws:

UnsupportedEncodingException - if encoding is not supported by the JDK.

ResourceReader

public ResourceReader(String resourceName)

Construct a reader object for the text file of the given name in this package, using the default encoding.

Parameters:

resourceName - the name of the text file located in this package's ".data" subpackage.

ResourceReader

public ResourceReader(Class<?> rootClass,
                      String resourceName,
                      String encoding)
               throws UnsupportedEncodingException

Construct a reader object for the text file of the given name in the given class's package, using the given encoding.

Parameters:

resourceName - the name of the text file located in the given class's package.

encoding - the encoding of the text file; if unsupported an exception is thrown

Throws:

UnsupportedEncodingException - if encoding is not supported by the JDK.

ResourceReader

public ResourceReader(InputStream is,
                      String resourceName,
                      String encoding)

Construct a reader object for the input stream associated with the given resource name.

Parameters:

is - the input stream of the resource

resourceName - the name of the resource

ResourceReader

public ResourceReader(InputStream is,
                      String resourceName)

Construct a reader object for the input stream associated with the given resource name.

Parameters:

is - the input stream of the resource

resourceName - the name of the resource

ResourceReader

public ResourceReader(Class<?> rootClass,
                      String resourceName)

Construct a reader object for the text file of the given name in the given class's package, using the default encoding.

Parameters:

resourceName - the name of the text file located in the given class's package.

Method Detail

readLine

public String readLine()
                throws IOException

Read and return the next line of the file or null if the end of the file has been reached.

Throws:

IOException

readLineSkippingComments

public String readLineSkippingComments(boolean trim)
                                throws IOException

Read a line, ignoring blank lines and lines that start with '#'.

Parameters:

trim - if true then trim leading Pattern_White_Space.

Throws:

IOException

readLineSkippingComments

public String readLineSkippingComments()
                                throws IOException

Read a line, ignoring blank lines and lines that start with '#'. Do not trim leading Pattern_White_Space.

Throws:

IOException

getLineNumber

public int getLineNumber()

Return the one-based line number of the last line returned by readLine() or readLineSkippingComments(). Should only be called after a call to one of these methods; otherwise the return value is undefined.

describePosition

public String describePosition()

Return a string description of the position of the last line returned by readLine() or readLineSkippingComments().

reset

public void reset()

Reset this reader so that the next call to readLine() returns the first line of the file again. This is a somewhat expensive call, however, calling reset() after calling it the first time does nothing if readLine() has not been called in between.

close

public void close()
           throws IOException

Closes the underlying reader and releases any system resources associated with it. If the stream is already closed then invoking this method has no effect.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException