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

Introduction

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

Prototype

public void ldc(TypeBinding typeBinding) 

Source Link

Usage

From source file:org.eclipse.objectteams.otdt.internal.core.compiler.lifting.Lifting.java

License:Open Source License

/**
* API for AbstractMethodDeclaration://from  www.  ja va  2s .c om
*
 *  Create a byte code sequence for a runtime check in a creation method:
 *  R _OT$create_OT$R(B b) {
 *       if (this._OT$cache_OT$R.contains(b))
 *       throw new DuplicateRoleException("R");
 *     // continue regular code.
 *  }
 *
 * Note, the need for this runtime check is detected quite late.
 * At this point it is easier to create the byte code sequence directly,
 * rather the creating AST first.
 */
public static void createDuplicateRoleCheck(CodeStream codeStream, AbstractMethodDeclaration method) {
    MethodBinding binding = method.binding;
    Scope scope = method.scope;

    ReferenceBinding roleType = (ReferenceBinding) binding.returnType;
    String roleName = new String(roleType.readableName());
    // TODO(SH): check why roleType.getRoleModel().getClassPartBinding().roleModel may yield a different result.
    // I think it occured in haeder/stopwatch from smile-CVS.
    //RoleModel role = roleType.getRealClass().roleModel;
    char[] cacheName = LiftingEnvironment.getCacheName(roleType.roleModel.getBoundRootRole());

    ReferenceBinding teamBinding = roleType.enclosingType();//role.getTeamModel().getBinding();
    FieldBinding cache = TypeAnalyzer.findField(teamBinding, cacheName, /*static*/false, /*outer*/false,
            ITranslationStates.STATE_FULL_LIFTING); // generated by this state
    if (cache == null)
        throw new InternalCompilerError("generated cache field not found: " + new String(cacheName)); //$NON-NLS-1$
    ReferenceBinding map = (ReferenceBinding) scope.getType(IOTConstants.WEAK_HASH_MAP, 3);
    MethodBinding contains = map.getMethod(scope, IOTConstants.CONTAINS_KEY);

    ReferenceBinding exc = (ReferenceBinding) scope.getType(IOTConstants.ORG_OBJECTTEAMS_DUPLICATE_ROLE, 3);
    TypeBinding[] types = new TypeBinding[] { scope.getJavaLangString() };
    MethodBinding excInit = exc.getExactConstructor(types);

    BranchLabel normalCase = new BranchLabel(codeStream);

    codeStream.aload_0(); // this
    codeStream.fieldAccess(Opcodes.OPC_getfield, cache, teamBinding); // getfield      MyTeam._OT$cache_OT$R Ljava/util/WeakHashMap;
    codeStream.aload_1(); // arg0
    codeStream.invoke(Opcodes.OPC_invokevirtual, contains, map); // invokevirtual java.util.WeakHashMap.containsKey (Ljava/lang/Object;)Z
    codeStream.ifeq(normalCase); // false -> #endif
    codeStream.new_(exc); // new           <org.objectteams.DuplicateRoleException>
    codeStream.dup(); // dup
    codeStream.ldc(roleName); // ldc "R"
    codeStream.invoke(Opcodes.OPC_invokespecial, excInit, exc); // invokespecial org.objectteams.DuplicateRoleException.<init> (Ljava/lang/String;)V
    codeStream.athrow(); // athrow
    normalCase.place(); // #endif
}

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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();//from  w  w w  .  j a v  a  2s  .  c  o  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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From source file:org.eclipse.objectteams.otdt.internal.core.compiler.statemachine.transformer.RoleMigrationImplementor.java

License:Open Source License

private static void doAddMigrateMethod(TypeDeclaration roleClassDecl, char[] selector,
        TypeReference argumentTypeRef, TypeReference returnTypeRef, final String kind, final char[] cacheName) {
    AstGenerator gen = new AstGenerator(roleClassDecl.sourceStart, roleClassDecl.sourceEnd);
    MethodDeclaration migrate = new MethodDeclaration(roleClassDecl.compilationResult) {
        @Override//from  w  ww .  ja  v a  2s. co  m
        protected void endOfMethodHook(ClassFile classfile) {
            // common code for both variants:
            CodeStream codeStream = classfile.codeStream;
            // if (otherTeam == null)
            BranchLabel goOn = new BranchLabel(codeStream);
            codeStream.aload_1(); //otherTeam / otherBase
            codeStream.ifnonnull(goOn);
            // { throw new NullPointerException("Team/base argument must not be null"); }
            ReferenceBinding npeBinding = (ReferenceBinding) this.scope.getType(JAVA_LANG_NULLPOINTEREXCEPTION,
                    3);
            codeStream.new_(npeBinding);
            codeStream.dup();
            MethodBinding npeStringCtor = getStringArgCtor(npeBinding);
            if (npeStringCtor == null)
                throw new InternalCompilerError(
                        "Expected constructor NullPointerException.<init>(String) not found"); //$NON-NLS-1$
            codeStream.ldc(kind + " argument must not be null"); //$NON-NLS-1$
            codeStream.invoke(Opcodes.OPC_invokespecial, npeStringCtor, npeBinding);
            codeStream.athrow();
            goOn.place();

            // specific code:
            if (kind == TEAM)
                genMigrateToTeamInstructions(codeStream, this.scope.enclosingSourceType());
            else
                genMigrateToBaseInstructions(codeStream, this.scope.enclosingSourceType(), this.scope,
                        cacheName);
        }

        private MethodBinding getStringArgCtor(ReferenceBinding npeBinding) {
            MethodBinding[] ctors = npeBinding.getMethods(TypeConstants.INIT);
            for (MethodBinding ctor : ctors) {
                if (ctor.parameters.length == 1 && ctor.parameters[0].id == TypeIds.T_JavaLangString)
                    return ctor;
            }
            return null;
        }

        @Override
        public void analyseCode(ClassScope classScope, FlowContext flowContext, FlowInfo flowInfo) {
            // noop
        }
    };
    gen.setMethodPositions(migrate);
    migrate.isGenerated = true;

    migrate.modifiers = AccPublic | AccSynchronized;
    migrate.typeParameters = new TypeParameter[] {
            gen.unboundedTypeParameter(RoleMigrationImplementor.TYPEPARAM) };
    migrate.returnType = returnTypeRef;
    migrate.selector = selector;
    migrate.arguments = new Argument[] { gen.argument(("other" + kind).toCharArray(), argumentTypeRef) }; //$NON-NLS-1$
    migrate.statements = new Statement[0];
    migrate.hasParsedStatements = true;
    AstEdit.addMethod(roleClassDecl, migrate);
}

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