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java.lang.Object com.bea.p13n.expression.internal.ComplexExpressionImpl com.bea.p13n.expression.operator.Operator com.bea.p13n.expression.operator.If
public final class If
Implementation of the If operator. The If operator
consists of three parts, the condition, the true action
and the false action. If the condition evaluates to true
the true action is evaluated otherwise the false condition
is evaluated.
Input 1: A Boolean object or Expression returning a Boolean object.
Input 2: An Expression
Input 3 (optional): An Expression.
Returns: The result of evaluating the true or false expression.
Field Summary |
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Fields inherited from interface com.bea.p13n.expression.ExpressionEvents |
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EVENT_ADD_SUBEXPRESSION, EVENT_CLEAR_CACHE, EVENT_INTERNAL_MAX, EVENT_REMOVE_SUBEXPRESSION, EVENT_SET_CACHE_ENABLED, EVENT_SET_CACHED_VALUE, EVENT_SET_PARENT, EVENT_SET_SOURCE, EVENT_SET_SUBEXPRESSION, EVENT_SET_USER_DATA |
Constructor Summary | |
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If()
Constructs an empty operator and operands can be added later by calling addSubExpression() on this. |
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If(Object logical,
Object trueEx,
Object falseEx)
Constructs this operator for the given operands. |
Method Summary | |
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Object |
getFalseExpression()
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Object |
getLogicalExpression()
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Class[] |
getParameterSignature()
Returns the parameter signature for this Expression . |
Object |
getTrueExpression()
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Methods inherited from class com.bea.p13n.expression.operator.Operator |
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leftHandSide, operand, rightHandSide |
Methods inherited from class com.bea.p13n.expression.internal.ComplexExpressionImpl |
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addListener, addSubExpression, clearCache, clone, createProxyExpression, equals, getCachedValue, getParent, getSource, getSubExpression, getSubExpressionCount, getUserData, hashCode, isCached, isCacheEnabled, isEqualitySubExpression, notifyListeners, removeAllSubExpressions, removeListener, removeSubExpression, removeSubExpression, setCachedValue, setCacheEnabled, setParent, setSource, setSubExpression, setUserData, toString, write |
Methods inherited from class java.lang.Object |
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finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public If()
public If(Object logical, Object trueEx, Object falseEx)
logical
- A Boolean object or expression returning a Boolean object.trueEx
- An expression that is executed if logical
returns Boolean true object.falseEx
- An expression that is executed if logical
returns Boolean false object.Method Detail |
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public Object getLogicalExpression()
public Object getTrueExpression()
public Object getFalseExpression()
public Class[] getParameterSignature()
Expression
Expression
.
Because the sub-expressions within the Expression
are
typically arguments or operands, some type validation is performed
by examining the class types of the sub-expressions against the
Expression
's parameter signature.
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Copyright © 2000, 2009, Oracle and/or its affiliates. All rights reserved. | ||||||||
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