com.asakusafw.runtime.io.util

Class WritableRawComparableUnion

java.lang.Object

com.asakusafw.runtime.io.util.WritableRawComparableUnion

All Implemented Interfaces:

Union, WritableRawComparable, Comparable<WritableRawComparable>, org.apache.hadoop.io.Writable, org.apache.hadoop.io.WritableComparable<WritableRawComparable>

public class WritableRawComparableUnion
extends Object
implements Union, WritableRawComparable

An abstract implementation of union object.

Since:

0.2.5

Constructor Summary

Constructors

Constructor and Description
WritableRawComparableUnion(Class<?>... classes) Creates a new instance.
WritableRawComparableUnion(WritableRawComparable... objects) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
int	compareInBytes(byte[] b1, int o1, byte[] b2, int o2) Compares two objects in bytes.
int	compareTo(WritableRawComparable o)
boolean	equals(Object obj)
Object	getObject() Returns the current object in union.
int	getPosition() Returns the current position in union.
int	getSizeInBytes(byte[] buf, int offset) Computes and returns size in bytes.
int	hashCode()
void	readFields(DataInput in)
Object	switchObject(int newPosition) Switches position and get its object.
String	toString()
void	write(DataOutput out)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

WritableRawComparableUnion

public WritableRawComparableUnion(Class<?>... classes)

Creates a new instance.

Parameters:

classes - element classes

Throws:

IllegalArgumentException - if some parameters were null

WritableRawComparableUnion

public WritableRawComparableUnion(WritableRawComparable... objects)

Creates a new instance.

Parameters:

objects - elements

Throws:

IllegalArgumentException - if some parameters were null

Method Detail

getPosition

public final int getPosition()

Description copied from interface: Union

Returns the current position in union.

Specified by:

getPosition in interface Union

Returns:

the current position in union

switchObject

public Object switchObject(int newPosition)

Description copied from interface: Union

Switches position and get its object.

Specified by:

switchObject in interface Union

Parameters:

newPosition - the position to set

Returns:

the object

getObject

public final Object getObject()

Description copied from interface: Union

Returns the current object in union.

Specified by:

getObject in interface Union

Returns:

the current object

write

public void write(DataOutput out)
           throws IOException

Specified by:

write in interface org.apache.hadoop.io.Writable

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Specified by:

readFields in interface org.apache.hadoop.io.Writable

Throws:

IOException

compareTo

public int compareTo(WritableRawComparable o)

Specified by:

compareTo in interface Comparable<WritableRawComparable>

getSizeInBytes

public int getSizeInBytes(byte[] buf,
                          int offset)
                   throws IOException

Description copied from interface: WritableRawComparable

Computes and returns size in bytes.

Specified by:

getSizeInBytes in interface WritableRawComparable

Parameters:

buf - bytes array

offset - bytes offset

Returns:

size in bytes

Throws:

IOException - if failed to compute size

compareInBytes

public int compareInBytes(byte[] b1,
                          int o1,
                          byte[] b2,
                          int o2)
                   throws IOException

Description copied from interface: WritableRawComparable

Compares two objects in bytes.

Specified by:

compareInBytes in interface WritableRawComparable

Parameters:

b1 - bytes representation of the first object

o1 - offset of the first object

b2 - bytes representation of the second object

o2 - offset of the second object

Returns:

the comparison result

Throws:

IOException - if failed to comparison

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object