org.omegahat.Environment.System
Class UserLevelSignalHandler

java.lang.Object
  |
  +--org.omegahat.Environment.Interpreter.BasicEvaluator
        |
        +--org.omegahat.Environment.Interpreter.UtilityEvaluator
              |
              +--org.omegahat.Environment.Interpreter.UserClassEvaluator
                    |
                    +--org.omegahat.Environment.Interpreter.SignallableEvaluator
                          |
                          +--org.omegahat.Environment.System.UserLevelSignalHandler

All Implemented Interfaces:

DatabaseCustomer, Evaluator, ManagedEvaluatorInt, java.lang.Runnable, java.io.Serializable, kh.signal.SignalListener

public class UserLevelSignalHandler

extends SignallableEvaluator

See Also:

Serialized Form

Field Summary

protected java.util.Hashtable

signalTable

Fields inherited from class org.omegahat.Environment.Interpreter.UserClassEvaluator

classManager

Fields inherited from class org.omegahat.Environment.Interpreter.BasicEvaluator

allowUnrestrictedAccess, class_lists, currentExpression, data, databases, debugger, DefaultAttachIndex, defaultDatabase, dynamicClassLoader, errorHandler, evaluationEvent, evaluationListeners, initialized, internalFunctionTables, internalPrimitiveClassNames, internalPrimitiveClassTable, lexer, localClasses, manager, options, output, parser, primitive_classes, primitiveClasses, PrimitiveClassNames, primitiveTypeNames, primitiveTypes, reversePrimitiveTypes, ShowMultipleClasses, sourceStack, stderr, stdout, SubEvaluationListeners, taskHistory, toplevelExpression, warningMessages

Fields inherited from interface kh.signal.SignalListener

SIG_MAX, SIG_MIN, SIGFPE, SIGHUP, SIGILL, SIGINT, SIGKILL, SIGQUIT, SIGTERM, SIGTRAP

Fields inherited from interface org.omegahat.Environment.Interpreter.Evaluator

ThisVariableName

Constructor Summary

UserLevelSignalHandler()

UserLevelSignalHandler(EvaluatorManager mgr)

UserLevelSignalHandler(Options opts)

Method Summary

java.lang.Object	addHandler(java.lang.Integer key, Evaluable expr)
java.lang.Object	addHandler(int sig, Evaluable expr)
boolean	isInterested(int signalNum)
java.lang.Object	removeHandler(int sig)
void	signalReceived(int signalNum) Method that is invoked by the signal administrator when it detects a signal has been raised.
java.util.Hashtable	signalTable()

Methods inherited from class org.omegahat.Environment.Interpreter.SignallableEvaluator

registerForSignals

Methods inherited from class org.omegahat.Environment.Interpreter.UserClassEvaluator

addMethod, classManager, classManager, createInstance, createInstance, createInstance, defineClass, defineClass, defineClass, defineClass, defineClass, defineClass, DefineUserClass, DefineUserClass, DefineUserClass, findUserClass, findUserClass, parseClass, parser

Methods inherited from class org.omegahat.Environment.Interpreter.UtilityEvaluator

evaluator, exec, exec, findFile, getEvaluator, setProperty, setProperty

Methods inherited from class org.omegahat.Environment.Interpreter.BasicEvaluator

addEvaluationListener, addFunctionTable, addFunctionTable, addSourceInput, addToHistory, allowUnrestrictedAccess, allowUnrestrictedAccess, asObject, asObject, asObject, asObjectName, asPrimitiveClass, assign, assign, assign, asWriter, attach, attach, attach, attach, attach, attach, attach, classInit, classLists, classLists, classPath, classPath, commandLine, convertPrimitive, copy, copy, copyByConstructor, copyBySerialization, createClassLists, currentExpression, currentExpression, data, data, database, database, database, Debug, Debug, Debug, Debug, Debug, debugger, debugger, defaultDatabase, defaultDatabase, defaultDatabase, defaultErrorHandler, detach, detach, displayTask, displayTask, displayWarnings, displayWarnings, dynamicClassLoader, dynamicClassLoader, endSource, endSource, endSource, endTaskEvaluation, error, error, errorHandler, errorHandler, evaluate, evaluate, evaluate, evaluate, evaluationError, evaluationListeners, evaluationListeners, evaluationListeners, exists, exit, exit, expandClassName, expandedClassPathElement, find, findAsField, findClass, findClass, findClass, findClass, findFunction, findFunctionOrMethod, functionTableList, get, get, get, get, get, get, get, get, get, getBaseURL, getEvaluationEvent, getEvaluationListeners, getField, getSubEvaluationListeners, help, Import, Import, Import, init, initialize, initTaskEvaluation, internalFunctionTables, isPrimitive, isPrimitive, javaVersion, lexer, lexer, lexer, localClasses, localClasses, manager, manager, newDatabase, newDatabase, notifyListeners, notifyListeners, objects, objects, objects, options, options, output, output, output, parse, parse, parse, parse, primitiveClass, q, q, remove, remove, remove, removeFunctionTable, run, same, searchForClass, searchPath, searchPath, searchPath, searchPath, setEvaluationEvent, setEvaluationListeners, setSubEvaluationListeners, show, show, show, source, source, source, source, source, source, source, source, source, sourceStack, stderr, stderr, stdout, stdout, taskHistory, taskHistory, toplevelExpression, toplevelExpression, useLazyEvaluation, warning, warning, warning, warnings, warnings, where, which, which

Methods inherited from class java.lang.Object

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

Field Detail

signalTable

protected java.util.Hashtable signalTable

Constructor Detail

UserLevelSignalHandler

public UserLevelSignalHandler()

UserLevelSignalHandler

public UserLevelSignalHandler(Options opts)

UserLevelSignalHandler

public UserLevelSignalHandler(EvaluatorManager mgr)

Method Detail

signalTable

public java.util.Hashtable signalTable()

addHandler

public java.lang.Object addHandler(int sig,
                                   Evaluable expr)

addHandler

public java.lang.Object addHandler(java.lang.Integer key,
                                   Evaluable expr)

removeHandler

public java.lang.Object removeHandler(int sig)

isInterested

public boolean isInterested(int signalNum)

Overrides:

isInterested in class SignallableEvaluator

signalReceived

public void signalReceived(int signalNum)

Description copied from class: SignallableEvaluator

Method that is invoked by the signal administrator when it detects a signal has been raised. Here we could remove the top-level task and terminate evaluating any more of its sub-expressions.

Overrides:

signalReceived in class SignallableEvaluator

Following copied from class: org.omegahat.Environment.Interpreter.SignallableEvaluator

Parameters:

signalNum - indicator of what type of signal was raised.