org.springframework.data.relational.core.sql

Interface Segment

All Superinterfaces:

Visitable

All Known Subinterfaces:

Assignment, Condition, Delete, Expression, Insert, Select, Update

All Known Implementing Classes:

AndCondition, AssignValue, AsteriskFromTable, BindMarker, Column, Comparison, Expressions.SimpleExpression, From, In, Into, IsNull, Join, Like, Literal, MultipleCondition, NestedCondition, Not, NumericLiteral, OrCondition, OrderByField, SelectList, SimpleCondition, SimpleFunction, SimpleSegment, StringLiteral, SubselectExpression, Table, Values, Where

public interface Segment
extends Visitable

Supertype of all Abstract Syntax Tree (AST) segments. Segments are typically immutable and mutator methods return new instances instead of changing the called instance.

Since:

1.1

Author:

Mark Paluch

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other) Check whether this Segment is equal to another Segment.
int	hashCode() Generate a hash code from thisSegment.
String	toString() Return a SQL string representation of this Segment.

Methods inherited from interface org.springframework.data.relational.core.sql.Visitable

visit

Method Detail

equals

boolean equals(Object other)

Check whether this Segment is equal to another Segment.

Equality is typically given if the toString() representation matches.

Overrides:

equals in class Object

Parameters:

other - the reference object with which to compare.

Returns:

true if this object is the same as the other argument; false otherwise.

hashCode

int hashCode()

Generate a hash code from thisSegment.

Hashcode typically derives from the toString() representation so two Segments yield the same hashCode() if their toString() representation matches.

Overrides:

hashCode in class Object

Returns:

a hash code value for this object.

toString

String toString()

Return a SQL string representation of this Segment.

The representation is intended for debugging purposes and an approximation to the generated SQL. While it might work in the context of a specific dialect, you should not that the toString() representation works across multiple databases.

Overrides:

toString in class Object

Returns:

a SQL string representation of this Segment.