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

Introduction

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

Prototype

public void new_(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   ww w.ja  va  2 s .c o m
*
 *  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
}

---

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();//  w  w  w .j  a va 2 s .  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();
}

---

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//w  w w  .  j a v a 2s  .  c o  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);
}

---