com.google.common.io

Class CharSink

java.lang.Object

com.google.common.io.CharSink

All Implemented Interfaces:

OutputSupplier<java.io.Writer>

public abstract class CharSink
extends java.lang.Object
implements OutputSupplier<java.io.Writer>

A destination to which characters can be written, such as a text file. Unlike a Writer, a CharSink is not an open, stateful stream that can be written to and closed. Instead, it is an immutable supplier of Writer instances.

CharSink provides two kinds of methods:

• Methods that return a writer: These methods should return a new, independent instance each time they are called. The caller is responsible for ensuring that the returned writer is closed.
• Convenience methods: These are implementations of common operations that are typically implemented by opening a writer using one of the methods in the first category, doing something and finally closing the writer that was opened.

Any ByteSink may be viewed as a CharSink with a specific character encoding using ByteSink.asCharSink(Charset). Characters written to the resulting CharSink will written to the ByteSink as encoded bytes.

Since:

14.0

Constructor Summary

Constructors

Constructor and Description
CharSink()

Method Summary

Modifier and Type	Method and Description
java.io.Writer	getOutput() Deprecated. This method is only provided for temporary compatibility with the OutputSupplier interface and should not be called directly. Use openStream() instead.
java.io.Writer	openBufferedStream() Opens a new buffered Writer for writing to this sink.
abstract java.io.Writer	openStream() Opens a new Writer for writing to this sink.
void	write(java.lang.CharSequence charSequence) Writes the given character sequence to this sink.
long	writeFrom(java.lang.Readable readable) Writes all the text from the given Readable (such as a Reader) to this sink.
void	writeLines(java.lang.Iterable<? extends java.lang.CharSequence> lines) Writes the given lines of text to this sink with each line (including the last) terminated with the operating system's default line separator.
void	writeLines(java.lang.Iterable<? extends java.lang.CharSequence> lines, java.lang.String lineSeparator) Writes the given lines of text to this sink with each line (including the last) terminated with the given line separator.

Methods inherited from class java.lang.Object

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

Constructor Detail

CharSink

public CharSink()

Method Detail

openStream

public abstract java.io.Writer openStream()
                                   throws java.io.IOException

Opens a new Writer for writing to this sink. This method should return a new, independent writer each time it is called.

The caller is responsible for ensuring that the returned writer is closed.

Throws:

java.io.IOException - if an I/O error occurs in the process of opening the writer

getOutput

@Deprecated
public final java.io.Writer getOutput()
                                           throws java.io.IOException

Deprecated. This method is only provided for temporary compatibility with the OutputSupplier interface and should not be called directly. Use openStream() instead.

This method is a temporary method provided for easing migration from suppliers to sources and sinks.

Specified by:

getOutput in interface OutputSupplier<java.io.Writer>

Throws:

java.io.IOException

Since:

15.0

openBufferedStream

public java.io.Writer openBufferedStream()
                                  throws java.io.IOException

Opens a new buffered Writer for writing to this sink. The returned stream is not required to be a BufferedWriter in order to allow implementations to simply delegate to openStream() when the stream returned by that method does not benefit from additional buffering. This method should return a new, independent writer each time it is called.

The caller is responsible for ensuring that the returned writer is closed.

Throws:

java.io.IOException - if an I/O error occurs in the process of opening the writer

Since:

15.0 (in 14.0 with return type BufferedWriter)

write

public void write(java.lang.CharSequence charSequence)
           throws java.io.IOException

Writes the given character sequence to this sink.

Throws:

java.io.IOException - if an I/O error in the process of writing to this sink

writeLines

public void writeLines(java.lang.Iterable<? extends java.lang.CharSequence> lines)
                throws java.io.IOException

Writes the given lines of text to this sink with each line (including the last) terminated with the operating system's default line separator. This method is equivalent to writeLines(lines, System.getProperty("line.separator")).

Throws:

java.io.IOException - if an I/O error occurs in the process of writing to this sink

writeLines

public void writeLines(java.lang.Iterable<? extends java.lang.CharSequence> lines,
                       java.lang.String lineSeparator)
                throws java.io.IOException

Writes the given lines of text to this sink with each line (including the last) terminated with the given line separator.

Throws:

java.io.IOException - if an I/O error occurs in the process of writing to this sink

writeFrom

public long writeFrom(java.lang.Readable readable)
               throws java.io.IOException

Writes all the text from the given Readable (such as a Reader) to this sink. Does not close readable if it is Closeable.

Throws:

java.io.IOException - if an I/O error occurs in the process of reading from readable or writing to this sink