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| package edu.rice.cs.drjava.model.repl.newjvm; |
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| import java.io.StringWriter; |
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| import java.io.PrintWriter; |
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| import java.io.Serializable; |
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| import edu.rice.cs.dynamicjava.interpreter.InterpreterException; |
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| import edu.rice.cs.dynamicjava.interpreter.EvaluatorException; |
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| public abstract class InterpretResult implements Serializable { |
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| public abstract <T> T apply(Visitor<T> v); |
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| |
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| public static interface Visitor<T> { |
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| public T forNoValue(); |
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| public T forStringValue(String val); |
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| public T forCharValue(Character val); |
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| public T forNumberValue(Number val); |
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| public T forBooleanValue(Boolean val); |
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| public T forObjectValue(String valString, String objTypeStr); |
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| public T forException(String message); |
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| public T forEvalException(String message, StackTraceElement[] stackTrace); |
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| public T forUnexpectedException(Throwable t); |
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| public T forBusy(); |
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| } |
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0
| public static InterpretResult busy() { return BusyResult.INSTANCE; }
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| private static class BusyResult extends InterpretResult { |
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| public static final BusyResult INSTANCE = new BusyResult(); |
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0
| public <T> T apply(Visitor<T> v) { return v.forBusy(); }
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| } |
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10
| public static InterpretResult exception(InterpreterException e) { return new ExceptionResult(e); }
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| private static class ExceptionResult extends InterpretResult { |
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| private final String _msg; |
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| private final StackTraceElement[] _stackTrace; |
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10
| public ExceptionResult(InterpreterException e) {
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10
| if (e instanceof EvaluatorException) {
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2
| _msg = e.getMessage();
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2
| _stackTrace = e.getCause().getStackTrace();
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| } |
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| else { |
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| StringWriter msg = new StringWriter();
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| e.printUserMessage(new PrintWriter(msg));
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| _msg = msg.toString().trim();
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| _stackTrace = null;
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| } |
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| } |
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| public <T> T apply(Visitor<T> v) {
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| if (_stackTrace != null)
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2
| return v.forEvalException(_msg, _stackTrace);
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| else |
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| return v.forException(_msg);
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| } |
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| } |
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0
| public static InterpretResult unexpectedException(Throwable t) {
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0
| return new UnexpectedExceptionResult(t);
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| } |
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| private static class UnexpectedExceptionResult extends InterpretResult { |
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| private final Throwable _t; |
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0
| public UnexpectedExceptionResult(Throwable t) { _t = t; }
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| public <T> T apply(Visitor<T> v) { return v.forUnexpectedException(_t); }
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| } |
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| public static InterpretResult noValue() { return NoValueResult.INSTANCE; }
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| private static class NoValueResult extends InterpretResult { |
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| public static final NoValueResult INSTANCE = new NoValueResult(); |
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| public <T> T apply(Visitor<T> v) { return v.forNoValue(); }
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| } |
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5
| public static InterpretResult stringValue(String s) { return new StringValueResult(s); }
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| private static class StringValueResult extends InterpretResult { |
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| private final String _val; |
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5
| public StringValueResult(String val) { _val = val; }
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| public <T> T apply(Visitor<T> v) { return v.forStringValue(_val); }
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| } |
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0
| public static InterpretResult charValue(Character c) { return new CharValueResult(c); }
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| private static class CharValueResult extends InterpretResult { |
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| private final Character _val; |
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0
| public CharValueResult(Character val) { _val = val; }
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| public <T> T apply(Visitor<T> v) { return v.forCharValue(_val); }
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| } |
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| public static InterpretResult numberValue(Number n) { return new NumberValueResult(n); }
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| private static class NumberValueResult extends InterpretResult { |
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| private final Number _val; |
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| public NumberValueResult(Number val) { _val = val; }
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| public <T> T apply(Visitor<T> v) { return v.forNumberValue(_val); }
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| } |
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0
| public static InterpretResult booleanValue(Boolean b) { return new BooleanValueResult(b); }
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| private static class BooleanValueResult extends InterpretResult { |
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| private final Boolean _val; |
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0
| public BooleanValueResult(Boolean val) { _val = val; }
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0
| public <T> T apply(Visitor<T> v) { return v.forBooleanValue(_val); }
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| } |
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| public static InterpretResult objectValue(String objS, String objTS) { return new ObjectValueResult(objS, objTS); }
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| private static class ObjectValueResult extends InterpretResult { |
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| private final String _objString; |
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| private final String _objTypeStr; |
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0
| public ObjectValueResult(String objString, String objTypeStr) {
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0
| _objString = objString;
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0
| _objTypeStr = objTypeStr;
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| } |
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0
| public <T> T apply(Visitor<T> v) { return v.forObjectValue(_objString, _objTypeStr); }
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| } |
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| } |