GenCode: Lambda theorethisch korrekt, hängt aber noch an einer
unbekannten NullPointerException
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@ -2,8 +2,10 @@ package de.dhbwstuttgart.syntaxtree.statement;
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import java.util.Hashtable;
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import org.apache.bcel.classfile.ConstantPool;
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import org.apache.bcel.generic.BIPUSH;
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import org.apache.bcel.generic.ClassGen;
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import org.apache.bcel.generic.ConstantPoolGen;
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import org.apache.bcel.generic.InstructionFactory;
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import org.apache.bcel.generic.InstructionList;
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import org.apache.bcel.generic.INVOKEDYNAMIC;
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@ -213,16 +215,22 @@ public class LambdaExpression extends Expr{
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@Override
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public InstructionList genByteCode(ClassGen cg) {
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//InstructionFactory _factory = new InstructionFactory(cg, cg.getConstantPool());
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ConstantPoolGen cp = cg.getConstantPool();
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InstructionList il = new InstructionList();
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short opcode = 186;//opcode - was genau ist das?
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/*
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* Bytecode:
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* 0: invokedynamic #2, 0 //#2 führt zu einem InvokeDynamic im KP - wildes Referenzieren
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* 5: astore_1 //Speichert wahrscheinlich den String meiner TestEXPR
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* 6: return
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*/
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//---Variante 1 mit opcode----
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short opcode = 186;//opcode - was genau ist das?
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il.append(new INVOKEDYNAMIC(opcode, 0));//Invokedynamic lässt sich bei mir weder automatisch noch manuell importieren
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//---Variante 2 mit Konstantenpool-Referenz---
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//int cpSize = cp.getSize()-1;//Vermutlich ist die benötigte Referenz das aktuellste Element?
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//il.append(new INVOKEDYNAMIC((short) cpSize, 0));
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return il;
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}
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@ -2,6 +2,7 @@ class LambdaExpr {
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void method() {
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Runnable r1 = () -> System.out.println("Hello world two!");
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lambda; lambda = ()-> 1;
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}
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}
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