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Java Source Code / Java Documentation » Report » pentaho report » org.jfree.report.modules.misc.bsf   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.jfree.report.function.AbstractExpression       org.jfree.report.modules.misc.bsf.BSFExpression BSFExpression public class BSFExpression extends AbstractExpression (Code) An expression that uses the Bean scripting framework to perform a scripted calculation. author:    Thomas Morgner Constructor Summary public   BSFExpression()      Default constructor, create a new BeanShellExpression. Method Summary public  Object clone()      Clones the expression and reinitializes the script. protected  BSFManager createInterpreter()      Creates a new interpreter instance. public  String getExpression()      Returns the script that gets evaluated every time the getValue() method is called. public  String getLanguage()      Returns the programming language, in which the interpreter work. public  String getScript()      Returns the script. public  Object getValue()      Evaluates the defined expression. protected  void initializeInterpreter(BSFManager interpreter)      Initializes the Bean-Scripting Framework manager. protected  void invalidate()      Invalidates the interpreter-cache and forces a reinterpretation of the script. public  void setExpression(String expression)      Sets the script that should be executed. public  void setLanguage(String language)      Defines the programming language of the script and expression. public  void setScript(String script)      Defines the script. Constructor Detail BSFExpression public BSFExpression()(Code) Default constructor, create a new BeanShellExpression. Method Detail clone public Object clone() throws CloneNotSupportedException(Code) Clones the expression and reinitializes the script. a clone of the expression. throws:   CloneNotSupportedException - this should never happen. createInterpreter protected BSFManager createInterpreter()(Code) Creates a new interpreter instance. the interpreter or null, if there was an error. getExpression public String getExpression()(Code) Returns the script that gets evaluated every time the getValue() method is called. the script. getLanguage public String getLanguage()(Code) Returns the programming language, in which the interpreter work. the programming language, which must be one of the supportedBSF-Languages. getScript public String getScript()(Code) Returns the script. The script is a predefined piece of code that gets executed once. It can (and should) be used to perform global initializations and to define functions. the script (can be null). getValue public Object getValue()(Code) Evaluates the defined expression. If an exception or an evaluation error occures, the evaluation returns null and the error is logged. The current datarow and a copy of the expressions properties are set to script-internal variables. Changes to the properties will not alter the expressions original properties and will be lost when the evaluation is finished. Expressions do not maintain a state and no assumptions about the order of evaluation can be made. the evaluated value or null. initializeInterpreter protected void initializeInterpreter(BSFManager interpreter) throws BSFException(Code) Initializes the Bean-Scripting Framework manager. Parameters:   interpreter - the BSF-Manager that should be initialized. throws:   BSFException - if an error occured. invalidate protected void invalidate()(Code) Invalidates the interpreter-cache and forces a reinterpretation of the script. setExpression public void setExpression(String expression)(Code) Sets the script that should be executed. Whats in the script depends on what langage is selected. Parameters:   expression - the script. setLanguage public void setLanguage(String language)(Code) Defines the programming language of the script and expression. Parameters:   language - the programming language of the script. setScript public void setScript(String script)(Code) Defines the script. The script is a predefined piece of code that gets executed once. It can (and should) be used to perform global initializations and to define functions. Parameters:   script - an initialization script. Methods inherited from org.jfree.report.function.AbstractExpression public Object clone() throws CloneNotSupportedException(Code)(Java Doc) public DataRow getDataRow()(Code)(Java Doc) public int getDependencyLevel()(Code)(Java Doc) public Expression getInstance()(Code)(Java Doc) public String getName()(Code)(Java Doc) public Configuration getReportConfiguration()(Code)(Java Doc) public ResourceBundleFactory getResourceBundleFactory()(Code)(Java Doc) public ExpressionRuntime getRuntime()(Code)(Java Doc) final public boolean isActive()(Code)(Java Doc) public boolean isDeepTraversing()(Code)(Java Doc) public boolean isPreserve()(Code)(Java Doc) final public void setActive(boolean active)(Code)(Java Doc) public void setDependencyLevel(int level)(Code)(Java Doc) public void setName(String name)(Code)(Java Doc) public void setPreserve(boolean preserve)(Code)(Java Doc) public void setRuntime(ExpressionRuntime runtime)(Code)(Java Doc) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)