org.eclipse.birt.data.engine.api.querydefn
Class ConditionalExpression

java.lang.Object
  org.eclipse.birt.data.engine.api.querydefn.BaseExpression
      org.eclipse.birt.data.engine.api.querydefn.ConditionalExpression

All Implemented Interfaces:

IBaseExpression, IConditionalExpression

public class ConditionalExpression

extends BaseExpression

implements IConditionalExpression

Default implementation of IConditionalExpression interface.

Field Summary

protected IScriptExpression	expr
protected IScriptExpression	op1
protected IScriptExpression	op2
protected int	operator

Fields inherited from class org.eclipse.birt.data.engine.api.querydefn.BaseExpression

dataType, handle

Fields inherited from interface org.eclipse.birt.data.engine.api.IConditionalExpression

OP_BETWEEN, OP_BOTTOM_N, OP_BOTTOM_PERCENT, OP_EQ, OP_FALSE, OP_GE, OP_GT, OP_LE, OP_LIKE, OP_LT, OP_MATCH, OP_NE, OP_NONE, OP_NOT_BETWEEN, OP_NOT_LIKE, OP_NOT_MATCH, OP_NOT_NULL, OP_NULL, OP_TOP_N, OP_TOP_PERCENT, OP_TRUE

Fields inherited from interface org.eclipse.birt.data.engine.api.IBaseExpression

GROUP_OVERALL

Constructor Summary

ConditionalExpression(IScriptExpression expr, int operator, IScriptExpression op1, IScriptExpression op2)
Constructs an instance, setting main expression, operator, and operands

ConditionalExpression(java.lang.String expr, int operator)
Constructs an instance, setting main expression and the operator (which takes no operands)

ConditionalExpression(java.lang.String expr, int operator, java.lang.String operand1)
Constructs an instance, setting main expression, a unary operator, and its operand

ConditionalExpression(java.lang.String expr, int operator, java.lang.String operand1, java.lang.String operand2)
Constructs an instance, setting main expression, a binary operator, and its two operands

Method Summary

int	getDataType() Gets the data type of the expression.
IScriptExpression	getExpression() Gets the main expression
IScriptExpression	getOperand1() Gets the expression for operand 1.
IScriptExpression	getOperand2() Gets the expression for operand 2.
int	getOperator() Gets the operator.
void	setDataType(int dataType) Sets the data type of the expression.
void	setGroupName(java.lang.String groupName) Set the group name this expession belongs to.

Methods inherited from class org.eclipse.birt.data.engine.api.querydefn.BaseExpression

getGroupName, getHandle, getID, setHandle, setID

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.eclipse.birt.data.engine.api.IBaseExpression

getGroupName, getHandle, setHandle

Field Detail

expr

protected IScriptExpression expr

operator

protected int operator

op1

protected IScriptExpression op1

op2

protected IScriptExpression op2

Constructor Detail

ConditionalExpression

public ConditionalExpression(java.lang.String expr,
                             int operator)

Constructs an instance, setting main expression and the operator (which takes no operands)

ConditionalExpression

public ConditionalExpression(java.lang.String expr,
                             int operator,
                             java.lang.String operand1)

Constructs an instance, setting main expression, a unary operator, and its operand

ConditionalExpression

public ConditionalExpression(java.lang.String expr,
                             int operator,
                             java.lang.String operand1,
                             java.lang.String operand2)

Constructs an instance, setting main expression, a binary operator, and its two operands

ConditionalExpression

public ConditionalExpression(IScriptExpression expr,
                             int operator,
                             IScriptExpression op1,
                             IScriptExpression op2)

Constructs an instance, setting main expression, operator, and operands

Method Detail

getExpression

public IScriptExpression getExpression()

Description copied from interface: IConditionalExpression

Gets the main expression

Specified by:

getExpression in interface IConditionalExpression

See Also:

IConditionalExpression.getExpression()

getOperator

public int getOperator()

Description copied from interface: IConditionalExpression

Gets the operator.

Specified by:

getOperator in interface IConditionalExpression

Returns:

The operator specified using one of the OP_xxx enumeration values defined in this interface.

See Also:

IConditionalExpression.getOperator()

getOperand1

public IScriptExpression getOperand1()

Description copied from interface: IConditionalExpression

Gets the expression for operand 1.

Specified by:

getOperand1 in interface IConditionalExpression

See Also:

IConditionalExpression.getOperand1()

getOperand2

public IScriptExpression getOperand2()

Description copied from interface: IConditionalExpression

Gets the expression for operand 2.

Specified by:

getOperand2 in interface IConditionalExpression

See Also:

IConditionalExpression.getOperand2()

getDataType

public int getDataType()

Description copied from interface: IBaseExpression

Gets the data type of the expression. Acceptable return values are those enumeration constants defined in the org.eclipse.birt.core.data.DataType class. If the result data type of the expression is not known, return UNKNOWN_TYPE.

Specified by:

getDataType in interface IBaseExpression

Overrides:

getDataType in class BaseExpression

See Also:

IBaseExpression.getDataType()

setDataType

public void setDataType(int dataType)

Sets the data type of the expression. For conditional expression, only BOOLEAN_TYPE is expected.

Overrides:

setDataType in class BaseExpression

setGroupName

public void setGroupName(java.lang.String groupName)

Description copied from interface: IBaseExpression

Set the group name this expession belongs to.

Specified by:

setGroupName in interface IBaseExpression

Overrides:

setGroupName in class BaseExpression