Package org.apache.hadoop.hdfs

Class XAttrHelper

java.lang.Object

org.apache.hadoop.hdfs.XAttrHelper

@Private
public class XAttrHelper
extends java.lang.Object

Constructor Summary

Constructors

Constructor	Description
XAttrHelper()

Method Summary

Modifier and Type	Method	Description
static XAttr	buildXAttr(java.lang.String name)	Build XAttr from xattr name with prefix.
static XAttr	buildXAttr(java.lang.String name, byte[] value)	Build XAttr from name with prefix and value.
static java.util.List<XAttr>	buildXAttrAsList(java.lang.String name)	Build xattr name with prefix as XAttr list.
static java.util.Map<java.lang.String,byte[]>	buildXAttrMap(java.util.List<XAttr> xAttrs)	Build xattr map from XAttr list, the key is xattr name with prefix, and value is xattr value.
static java.util.List<XAttr>	buildXAttrs(java.util.List<java.lang.String> names)	Build XAttr list from xattr name list.
static XAttr	getFirstXAttr(java.util.List<XAttr> xAttrs)	Get first xattr from XAttr list
static byte[]	getFirstXAttrValue(java.util.List<XAttr> xAttrs)	Get value of first xattr from XAttr list
static java.lang.String	getPrefixedName(XAttr xAttr)	Get name with prefix from XAttr
static java.lang.String	getPrefixedName(XAttr.NameSpace ns, java.lang.String name)

Methods inherited from class java.lang.Object

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

Constructor Detail

XAttrHelper

public XAttrHelper()

Method Detail

buildXAttr

public static XAttr buildXAttr(java.lang.String name)

Build XAttr from xattr name with prefix.

buildXAttr

public static XAttr buildXAttr(java.lang.String name,
                               byte[] value)

Build XAttr from name with prefix and value. Name can not be null. Value can be null. The name and prefix are validated. Both name and namespace are case sensitive.

buildXAttrAsList

public static java.util.List<XAttr> buildXAttrAsList(java.lang.String name)

Build xattr name with prefix as XAttr list.

getFirstXAttrValue

public static byte[] getFirstXAttrValue(java.util.List<XAttr> xAttrs)

Get value of first xattr from XAttr list

getFirstXAttr

public static XAttr getFirstXAttr(java.util.List<XAttr> xAttrs)

Get first xattr from XAttr list

buildXAttrMap

public static java.util.Map<java.lang.String,byte[]> buildXAttrMap(java.util.List<XAttr> xAttrs)

Build xattr map from XAttr list, the key is xattr name with prefix, and value is xattr value.

getPrefixedName

public static java.lang.String getPrefixedName(XAttr xAttr)

Get name with prefix from XAttr

getPrefixedName

public static java.lang.String getPrefixedName(XAttr.NameSpace ns,
                                               java.lang.String name)

buildXAttrs

public static java.util.List<XAttr> buildXAttrs(java.util.List<java.lang.String> names)

Build XAttr list from xattr name list.