Package org.apache.hadoop.fs.impl

Class StoreImplementationUtils

java.lang.Object

org.apache.hadoop.fs.impl.StoreImplementationUtils

@Private
@Unstable
public final class StoreImplementationUtils
extends Object

Utility classes to help implementing filesystems and streams.

Method Summary

Modifier and Type	Method	Description
static boolean	hasCapability(InputStream in, String capability)	Probe for an input stream having a capability; returns true if the stream implements StreamCapabilities and its hasCapabilities() method returns true for the capability.
static boolean	hasCapability(OutputStream out, String capability)	Probe for an output stream having a capability; returns true if the stream implements StreamCapabilities and its hasCapabilities() method returns true for the capability.
static boolean	isProbeForSyncable(String capability)	Check the probe capability being for StreamCapabilities.HSYNC or StreamCapabilities.HFLUSH Syncable.hsync() and Syncable.hflush() functionality.

Methods inherited from class java.lang.Object

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

Method Details

isProbeForSyncable

public static boolean isProbeForSyncable(String capability)

Check the probe capability being for StreamCapabilities.HSYNC or StreamCapabilities.HFLUSH Syncable.hsync() and Syncable.hflush() functionality.

Parameters:

capability - capability string.

Returns:

true if either refers to one of the Syncable operations.

hasCapability

public static boolean hasCapability(OutputStream out,
 String capability)

Probe for an output stream having a capability; returns true if the stream implements StreamCapabilities and its hasCapabilities() method returns true for the capability.

Parameters:

out - output stream

capability - capability to probe for

Returns:

true if the stream declares that it supports the capability.

hasCapability

public static boolean hasCapability(InputStream in,
 String capability)

Probe for an input stream having a capability; returns true if the stream implements StreamCapabilities and its hasCapabilities() method returns true for the capability.

Parameters:

in - input stream

capability - capability to probe for

Returns:

true if the stream declares that it supports the capability.