Example usage for org.eclipse.jdt.internal.compiler.codegen CodeStream aconst_null

Introduction

In this page you can find the example usage for org.eclipse.jdt.internal.compiler.codegen CodeStream aconst_null.

Prototype

public void aconst_null() 

Source Link

Usage

From source file:org.eclipse.objectteams.otdt.internal.core.compiler.ast.PrivateRoleMethodCall.java

License:Open Source License

@Override
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
    // manually redirect to synth bridge:
    Expression receiverReference;
    boolean isCallinAccess = false;
    if (RoleTypeBinding.isRoleWithExplicitAnchor(this.actualReceiverType)) {
        // new receiver is the anchor denoting the base role's enclosing team instance:
        ITeamAnchor teamAnchor = ((RoleTypeBinding) this.actualReceiverType)._teamAnchor;
        TypeAnchorReference syntheticReceiver = this.gen.typeAnchorReference(teamAnchor);
        syntheticReceiver.isExpression = true;
        receiverReference = syntheticReceiver;
    } else {//from   w  w w. j  av  a2  s  . c  o m
        isCallinAccess = true;
        // call from inside a otre-dyn callin wrapper: receiver is the current team:
        receiverReference = this.gen.thisReference();
    }
    receiverReference.resolve(currentScope);
    if (this.isCalloutToField)
        // for c-t-f this receiver *replaces* the original receiver,
        // role instance additionally exists as a visible method argument
        this.receiver = receiverReference;
    else
        // for method callout or callin to private *add* the team instance to the front of pushes
        // original role instance receiver will become the first implicit argument
        receiverReference.generateCode(currentScope, codeStream, true/*valueRequired*/);

    if (isCallinAccess) {
        // might need more synthetic args:
        if (this.binding.isStatic()) {
            codeStream.aconst_null(); // first arg in role bridge: (null) role
            codeStream.iconst_0(); // enclosingTeamInstance: dummy value 
            codeStream.aload_0(); // enclosingTeamInstance: team instance
        }
    }
    // directly use the accessor and its declaring class for the invoke instruction:
    this.binding = this.syntheticAccessor;
    this.actualReceiverType = this.syntheticAccessor.declaringClass;
    this.syntheticAccessor = null;
    super.generateCode(currentScope, codeStream, valueRequired);
}

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From source file:org.eclipse.objectteams.otdt.internal.core.compiler.ast.RoleClassLiteralAccess.java

License:Open Source License

public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
    // simply delegate:
    if (this.send != null)
        this.send.generateCode(currentScope, codeStream, valueRequired);
    else if (valueRequired)
        codeStream.aconst_null();
}

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From source file:org.eclipse.objectteams.otdt.internal.core.compiler.ast.TSuperMessageSend.java

License:Open Source License

@SuppressWarnings("hiding")
@Override/*  w ww . j a  v a 2s .com*/
public void generateArguments(MethodBinding binding, Expression[] arguments, BlockScope currentScope,
        CodeStream codeStream) {
    super.generateArguments(binding, arguments, currentScope, codeStream);
    // check if we need to pass the marker arg, too:
    TypeBinding[] parameters = this.binding.parameters;
    TypeBinding tsuperMarkerBinding = parameters.length == 0 ? null : parameters[parameters.length - 1];
    if (tsuperMarkerBinding == null || !TSuperHelper.isMarkerInterface(tsuperMarkerBinding))
        return;
    codeStream.aconst_null();
    codeStream.checkcast(tsuperMarkerBinding);
}

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From source file:org.eclipse.objectteams.otdt.internal.core.compiler.bytecode.BytecodeTransformer.java

License:Open Source License

/**
 * Add a byte code sequence that is a placeholder for chaining the
 * marker arg if the current method is copied lateron.
 * (See class comment in class ExplicitConstructorCall).
 *
 * @param scope//from   w ww.  ja  v  a 2  s . c  om
 * @param codeStream
 * @param chainTSuperMarkArgPos position that a marker arg will get when added.
 */
public static void addChainingPlaceholder(BlockScope scope, CodeStream codeStream, int chainTSuperMarkArgPos) {
    // create local variable "Object _OT$chainArg"
    // at the very position that will be taken by an added
    // marker argument:
    LocalVariableBinding nullVar = new LocalVariableBinding("_OT$chainArg".toCharArray(), //$NON-NLS-1$
            scope.getJavaLangObject(), 0, false);
    nullVar.resolvedPosition = chainTSuperMarkArgPos;
    nullVar.useFlag = LocalVariableBinding.USED;
    nullVar.declaringScope = scope.methodScope();
    codeStream.record(nullVar);
    codeStream.addVisibleLocalVariable(nullVar);
    // add dummy code sequence "aconst_null; astore <i>"
    // which will be changed by BytecodeTransformer.replaceChainArg
    // to "nop; aload <i>" with the same <i>.
    codeStream.aconst_null();
    codeStream.astore(chainTSuperMarkArgPos); // optimize small indices?
    // record positions for local varaible table.
    nullVar.recordInitializationStartPC(0);
    if (nullVar.initializationPCs != null)
        nullVar.recordInitializationEndPC(codeStream.position);
}

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From source file:org.eclipse.objectteams.otdt.internal.core.compiler.lookup.SyntheticBaseCallSurrogate.java

License:Open Source License

/** Directly generate the instruction for this method's body (no AST available). */
public void generateInstructions(CodeStream codeStream) {
    codeStream.new_(this.errorType);
    codeStream.dup();// ww  w. j av  a2  s . co  m
    codeStream.ldc("Binding error: base-call impossible!"); //$NON-NLS-1$
    MethodBinding ctorBinding = ((ReferenceBinding) this.errorType)
            .getExactConstructor(new TypeBinding[] { this.stringType });
    codeStream.invoke(Opcodes.OPC_invokespecial, ctorBinding, this.errorType);
    codeStream.athrow();
    codeStream.aconst_null(); // always generalized to Object
    codeStream.areturn();
}

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