org.apache.jdo.jdoql.tree
Interface BinaryExpression

All Superinterfaces:

Expression, Node, java.io.Serializable

All Known Subinterfaces:

AndExpression, ConditionalAndExpression, ConditionalOrExpression, DivideExpression, EqualsExpression, GreaterThanEqualsExpression, GreaterThanExpression, LessThanEqualsExpression, LessThanExpression, MinusExpression, NotEqualsExpression, OrExpression, PlusExpression, TimesExpression

All Known Implementing Classes:

AndExpr, BinaryExpr, ConditionalAndExpr, ConditionalOrExpr, DivideExpr, EqualsExpr, GreaterThanEqualsExpr, GreaterThanExpr, LessThanEqualsExpr, LessThanExpr, MinusExpr, NotEqualsExpr, OrExpr, PlusExpr, TimesExpr

public interface BinaryExpression

extends Expression

This node expression represents a binary operator. All binary operators have exactly two children. Examples of binary operators are AndExpression and EqualsExpression.

Author:

Michael Watzek

Method Summary

java.lang.Class	getCommonOperandType() Returns the class instance suiteable for implementing the result of this expression.
Expression	getLeftExpression() Returns the first child of this node.
Expression	getRightExpression() Returns the second child of this node.

Methods inherited from interface org.apache.jdo.jdoql.tree.Node

arrive, getChildren, getJavaClass, getObject, getParent, getTokenType, leave, setObject, setParent, walkNextChild

Method Detail

getLeftExpression

public Expression getLeftExpression()

Returns the first child of this node.

Returns:

the first child

getRightExpression

public Expression getRightExpression()

Returns the second child of this node.

Returns:

the second child

getCommonOperandType

public java.lang.Class getCommonOperandType()

Returns the class instance suiteable for implementing the result of this expression. In case of integral binary expressions that class instance is also the result type of the operation retrieved by method getJavaClass. In case of relational binary expressions, that class instance differs from the type retrieved by getJavaClass, because relational binary expressions have a boolean result type which does not depend of the operand types.

Returns:

the common operand type