Package org.jfree.report.expressions.sys
Class IsNullExpression
- java.lang.Object
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- org.jfree.report.expressions.AbstractExpression
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- org.jfree.report.expressions.sys.IsNullExpression
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Cloneable
,Expression
public class IsNullExpression extends AbstractExpression
Creation-Date: 27.01.2006, 20:42:19- Author:
- Thomas Morgner
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description IsNullExpression()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.Object
computeValue()
Return the current expression value.java.lang.Object
getValue()
void
setValue(java.lang.Object value)
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Methods inherited from class org.jfree.report.expressions.AbstractExpression
clone, getDataRow, getInstance, getName, getParentLocale, getReportConfiguration, getResourceBundleFactory, getRuntime, isDeepTraversing, isPrecompute, isPreserve, setDeepTraversing, setName, setPrecompute, setPreserve, setRuntime
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Method Detail
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getValue
public java.lang.Object getValue()
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setValue
public void setValue(java.lang.Object value)
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computeValue
public java.lang.Object computeValue() throws DataSourceException
Return the current expression value.The value depends (obviously) on the expression implementation.
- Returns:
- the value of the function.
- Throws:
DataSourceException
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