com.google.common.io

Class ByteSource.ConcatenatedByteSource

java.lang.Object

com.google.common.io.ByteSource

com.google.common.io.ByteSource.ConcatenatedByteSource

Enclosing class:

ByteSource

private static final class ByteSource.ConcatenatedByteSource
extends ByteSource

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.Iterable<? extends ByteSource>	sources

Constructor Summary

Constructors

Constructor and Description
ConcatenatedByteSource(java.lang.Iterable<? extends ByteSource> sources)

Method Summary

Modifier and Type	Method and Description
boolean	isEmpty() Returns whether the source has zero bytes.
java.io.InputStream	openStream() Opens a new InputStream for reading from this source.
long	size() Returns the size of this source in bytes.
java.lang.String	toString()

Methods inherited from class com.google.common.io.ByteSource

asCharSource, concat, concat, concat, contentEquals, copyTo, copyTo, empty, hash, openBufferedStream, read, read, slice, wrap

Methods inherited from class java.lang.Object

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

Field Detail

sources

private final java.lang.Iterable<? extends ByteSource> sources

Constructor Detail

ConcatenatedByteSource

ConcatenatedByteSource(java.lang.Iterable<? extends ByteSource> sources)

Method Detail

openStream

public java.io.InputStream openStream()
                               throws java.io.IOException

Description copied from class: ByteSource

Opens a new InputStream for reading from this source. This method should return a new, independent stream each time it is called.

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

Specified by:

openStream in class ByteSource

Throws:

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

isEmpty

public boolean isEmpty()
                throws java.io.IOException

Description copied from class: ByteSource

Returns whether the source has zero bytes. The default implementation is to open a stream and check for EOF.

Overrides:

isEmpty in class ByteSource

Throws:

java.io.IOException - if an I/O error occurs

size

public long size()
          throws java.io.IOException

Description copied from class: ByteSource

Returns the size of this source in bytes. For most implementations, this is a heavyweight operation that will open a stream, read (or skip, if possible) to the end of the stream and return the total number of bytes that were read.

For some sources, such as a file, this method may use a more efficient implementation. Note that in such cases, it is possible that this method will return a different number of bytes than would be returned by reading all of the bytes (for example, some special files may return a size of 0 despite actually having content when read).

In either case, if this is a mutable source such as a file, the size it returns may not be the same number of bytes a subsequent read would return.

Overrides:

size in class ByteSource

Throws:

java.io.IOException - if an I/O error occurs in the process of reading the size of this source

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object