simpledb

Interface Field

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

IntField, StringField

public interface Field
extends java.io.Serializable

Interface for values of fields in tuples in SimpleDB.

Method Summary

Modifier and Type	Method and Description
boolean	compare(Predicate.Op op, Field value) Compare the value of this field object to the passed in value.
boolean	equals(java.lang.Object field)
Type	getType() Returns the type of this field (see Type.INT_TYPE or Type.STRING_TYPE
int	hashCode() Hash code.
void	serialize(java.io.DataOutputStream dos) Write the bytes representing this field to the specified DataOutputStream.
java.lang.String	toString()

Method Detail

serialize

void serialize(java.io.DataOutputStream dos)
        throws java.io.IOException

Write the bytes representing this field to the specified DataOutputStream.

Parameters:

dos - The DataOutputStream to write to.

Throws:

java.io.IOException

See Also:

DataOutputStream

compare

boolean compare(Predicate.Op op,
                Field value)

Compare the value of this field object to the passed in value.

Parameters:

op - The operator

value - The value to compare this Field to

Returns:

Whether or not the comparison yields true.

getType

Type getType()

Returns the type of this field (see Type.INT_TYPE or Type.STRING_TYPE

Returns:

type of this field

hashCode

int hashCode()

Hash code. Different Field objects representing the same value should probably return the same hashCode.

Overrides:

hashCode in class java.lang.Object

equals

boolean equals(java.lang.Object field)

Overrides:

equals in class java.lang.Object

toString

java.lang.String toString()

Overrides:

toString in class java.lang.Object