SimpleDB/Field.java at master · SeanLachhander/SimpleDB · GitHub

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packagesimpledb;

importjava.io.*;

/**
 * Interface for values of fields in tuples in SimpleDB.
 */
publicinterfaceField {
/**
 * Write the bytes representing this field to the specified
 * DataOutputStream.
 * @see DataOutputStream
 * @param dos The DataOutputStream to write to.
 */
voidserialize(DataOutputStreamdos) throwsIOException;

/**
 * Compare the value of this field object to the passed in value.
 * @param op The operator
 * @param value The value to compare this Field to
 * @return Whether or not the comparison yields true.
 */
publicbooleancompare(Predicate.Opop, Fieldvalue);

/**
 * Returns the type of this field (see {@link Type#INT_TYPE} or {@link Type#STRING_TYPE}
 * @return type of this field
 */
publicTypegetType();

/**
 * Hash code.
 * Different Field objects representing the same value should probably
 * return the same hashCode.
 */
publicinthashCode();
publicbooleanequals(Objectfield);

publicStringtoString();
}