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IntField.java
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IntField.java
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package simpledb;
import java.io.*;
/**
* Instance of Field that stores a single integer.
*/
public class IntField implements Field {
private int value;
public int getValue() {
return value;
}
/**
* Constructor.
*
* @param i The value of this field.
*/
public IntField(int i) {
value = i;
}
public String toString() {
return Integer.toString(value);
}
public int hashCode() {
return value;
}
public boolean equals(Object field) {
return ((IntField) field).value == value;
}
public void serialize(DataOutputStream dos) throws IOException {
dos.writeInt(value);
}
/**
* Compare the specified field to the value of this Field.
* Return semantics are as specified by Field.compare
*
* @throws IllegalCastException if val is not an IntField
* @see Field#compare
*/
public boolean compare(Predicate.Op op, Field val) {
IntField iVal = (IntField) val;
switch (op) {
case EQUALS:
return value == iVal.value;
case NOT_EQUALS:
return value != iVal.value;
case GREATER_THAN:
return value > iVal.value;
case GREATER_THAN_OR_EQ:
return value >= iVal.value;
case LESS_THAN:
return value < iVal.value;
case LESS_THAN_OR_EQ:
return value <= iVal.value;
case LIKE:
return value == iVal.value;
}
return false;
}
/**
* Return the Type of this field.
* @return Type.INT_TYPE
*/
public Type getType() {
return Type.INT_TYPE;
}
}