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java.lang.ObjectBSFEngineImpl
ubc.cs.JLog.Extras.BSF.JLogBSFEngine
public class JLogBSFEngine
This is an adapter for JLog to be used with BSF, the Bean Scripting Framework from IBM and Apache Jakarta. This BSFEngine does not support the concept of 'declared' beans; it treats them the same as 'registered' beans. That is due to there not really being a concept of free-standing variables in Prolog, just predicate calls.
Field Summary | |
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protected static boolean |
DEBUG
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Constructor Summary | |
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JLogBSFEngine()
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Method Summary | |
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java.lang.Object |
call(java.lang.Object obj,
java.lang.String method,
java.lang.Object[] args)
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void |
declareBean(BSFDeclaredBean bean)
Declare a bean with the BSFManager. |
java.lang.Object |
eval(java.lang.String source,
int lineNo,
int columnNo,
java.lang.Object oscript)
This is used by an application to evaluate a string containing some expression. |
void |
exec(java.lang.String source,
int lineNo,
int columnNo,
java.lang.Object script)
This is used to consult a string. |
void |
initialize(BSFManager mgrParam,
java.lang.String langParam,
java.util.Vector declaredBeansParam)
Initialize the engine. |
java.lang.Object |
lookupBean(java.lang.String beanName)
Look up a bean in the BSFManager. |
jTerm |
object2term(java.lang.Object obj)
Translates a Java object to its Prolog equivalent. |
void |
registerBean(java.lang.String beanName,
java.lang.Object bean)
Register a bean with the BSFManager. |
java.lang.Object |
term2object(jTerm term)
Translates a Prolog object to its Java equivalent. |
void |
terminate()
Shut down the engine. |
void |
undeclareBean(BSFDeclaredBean bean)
Undeclare a previously registered bean. |
void |
unregisterBean(java.lang.String beanName)
Unregister a previously registered bean. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected static final boolean DEBUG
Constructor Detail |
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public JLogBSFEngine()
Method Detail |
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public void initialize(BSFManager mgrParam, java.lang.String langParam, java.util.Vector declaredBeansParam) throws BSFException
BSFException
public void terminate()
public jTerm object2term(java.lang.Object obj)
public java.lang.Object term2object(jTerm term)
public java.lang.Object lookupBean(java.lang.String beanName)
public void registerBean(java.lang.String beanName, java.lang.Object bean)
public void unregisterBean(java.lang.String beanName) throws BSFException
BSFException
public void declareBean(BSFDeclaredBean bean) throws BSFException
BSFException
public void undeclareBean(BSFDeclaredBean bean) throws BSFException
BSFException
public java.lang.Object call(java.lang.Object obj, java.lang.String method, java.lang.Object[] args) throws BSFException
method
- The name of the method to call.args
- an array of arguments to be
passed to the extension, which may be either Vectors of Nodes, or Strings.
BSFException
public java.lang.Object eval(java.lang.String source, int lineNo, int columnNo, java.lang.Object oscript) throws BSFException
BSFException
public void exec(java.lang.String source, int lineNo, int columnNo, java.lang.Object script) throws BSFException
BSFException
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