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java.lang.Objectorg.apache.hadoop.io.UTF8
@Deprecated
@InterfaceAudience.LimitedPrivate(value={"HDFS","MapReduce"})
@InterfaceStability.Stable
public class UTF8A WritableComparable for strings that uses the UTF8 encoding.
Also includes utilities for efficiently reading and writing UTF-8. Note that this decodes UTF-8 but actually encodes CESU-8, a variant of UTF-8: see http://en.wikipedia.org/wiki/CESU-8
| Nested Class Summary | |
|---|---|
static class |
UTF8.Comparator
Deprecated. A WritableComparator optimized for UTF8 keys. |
| Constructor Summary | |
|---|---|
UTF8()
Deprecated. |
|
UTF8(String string)
Deprecated. Construct from a given string. |
|
UTF8(UTF8 utf8)
Deprecated. Construct from a given string. |
|
| Method Summary | |
|---|---|
int |
compareTo(UTF8 o)
Deprecated. Compare two UTF8s. |
boolean |
equals(Object o)
Deprecated. Returns true iff o is a UTF8 with the same contents. |
static String |
fromBytes(byte[] bytes)
Deprecated. Convert a UTF-8 encoded byte array back into a string. |
byte[] |
getBytes()
Deprecated. The raw bytes. |
static byte[] |
getBytes(String string)
Deprecated. Convert a string to a UTF-8 encoded byte array. |
int |
getLength()
Deprecated. The number of bytes in the encoded string. |
int |
hashCode()
Deprecated. |
void |
readFields(DataInput in)
Deprecated. Deserialize the fields of this object from in. |
static String |
readString(DataInput in)
Deprecated. Read a UTF-8 encoded string. |
void |
set(String string)
Deprecated. Set to contain the contents of a string. |
void |
set(UTF8 other)
Deprecated. Set to contain the contents of a string. |
static void |
skip(DataInput in)
Deprecated. Skips over one UTF8 in the input. |
String |
toString()
Deprecated. Convert to a String. |
String |
toStringChecked()
Deprecated. Convert to a string, checking for valid UTF8. |
void |
write(DataOutput out)
Deprecated. Serialize the fields of this object to out. |
static int |
writeString(DataOutput out,
String s)
Deprecated. Write a UTF-8 encoded string. |
| Methods inherited from class java.lang.Object |
|---|
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
|---|
public UTF8()
public UTF8(String string)
public UTF8(UTF8 utf8)
| Method Detail |
|---|
public byte[] getBytes()
public int getLength()
public void set(String string)
public void set(UTF8 other)
public void readFields(DataInput in)
throws IOException
Writablein.
For efficiency, implementations should attempt to re-use storage in the existing object where possible.
readFields in interface Writablein - DataInput to deseriablize this object from.
IOException
public static void skip(DataInput in)
throws IOException
IOException
public void write(DataOutput out)
throws IOException
Writableout.
write in interface Writableout - DataOuput to serialize this object into.
IOExceptionpublic int compareTo(UTF8 o)
compareTo in interface Comparable<UTF8>public String toString()
toString in class Object
public String toStringChecked()
throws IOException
UTFDataFormatException - if the underlying bytes contain invalid
UTF8 data.
IOExceptionpublic boolean equals(Object o)
o is a UTF8 with the same contents.
equals in class Objectpublic int hashCode()
hashCode in class Objectpublic static byte[] getBytes(String string)
String.getBytes(String)
public static String fromBytes(byte[] bytes)
throws IOException
IOException - if the byte array is invalid UTF8
public static String readString(DataInput in)
throws IOException
IOExceptionDataInput.readUTF()
public static int writeString(DataOutput out,
String s)
throws IOException
IOExceptionDataOutput.writeUTF(String)
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