Java Flags.STATIC屬性代碼示例

public static long modifiersToFlags(Set<Modifier> flagset) {
    long flags = 0L;
    for (Modifier mod : flagset)
        switch (mod) {
            case PUBLIC: flags |= Flags.PUBLIC; break;
            case PROTECTED: flags |= Flags.PROTECTED; break;
            case PRIVATE: flags |= Flags.PRIVATE; break;
            case ABSTRACT: flags |= Flags.ABSTRACT; break;
            case STATIC: flags |= Flags.STATIC; break;
            case FINAL: flags |= Flags.FINAL; break;
            case TRANSIENT: flags |= Flags.TRANSIENT; break;
            case VOLATILE: flags |= Flags.VOLATILE; break;
            case SYNCHRONIZED: flags |= Flags.SYNCHRONIZED; break;
            case NATIVE: flags |= Flags.NATIVE; break;
            case STRICTFP: flags |= Flags.STRICTFP; break;
            case DEFAULT: flags |= Flags.DEFAULT; break;
            default:
                throw new AssertionError("Unknown Modifier: " + mod); //NOI18N
        }
    return flags;
}
 

/**
    * Returns true if this element represents a method which overrides a
    * method in one of its superclasses.
    */
   public boolean overridesMethod(ExecutableElement element) {
       MethodSymbol m = (MethodSymbol)element;
       if ((m.flags() & Flags.STATIC) == 0) {
           ClassSymbol owner = (ClassSymbol) m.owner;
           for (Type sup = jctypes.supertype(m.owner.type);
                   sup.hasTag(TypeTag.CLASS);
                   sup = jctypes.supertype(sup)) {
               for (Symbol sym : sup.tsym.members().getSymbolsByName(m.name)) {
                   if (m.overrides(sym, owner, jctypes, true)) 
                       return true;
               }
           }
       }
return false;
   }
 

public ModifiersTree addModifiersModifier(ModifiersTree modifiers, Modifier modifier) {
    long c = ((JCModifiers) modifiers).flags & ~Flags.GENERATEDCONSTR;
    switch (modifier) {
        case ABSTRACT: c = c | Flags.ABSTRACT; break;
        case FINAL: c = c | Flags.FINAL; break;
        case NATIVE: c = c | Flags.NATIVE; break;
        case PRIVATE: c = c | Flags.PRIVATE; break;
        case PROTECTED: c = c | Flags.PROTECTED; break;
        case PUBLIC: c = c | Flags.PUBLIC; break;
        case STATIC: c = c | Flags.STATIC; break;
        case STRICTFP: c = c | Flags.STRICTFP; break;
        case SYNCHRONIZED: c = c | Flags.SYNCHRONIZED; break;
        case TRANSIENT: c = c | Flags.TRANSIENT; break;
        case VOLATILE: c = c | Flags.VOLATILE; break;
        case DEFAULT: c = c | Flags.DEFAULT; break;
        default:
            break;
    }
    return Modifiers(c, modifiers.getAnnotations());
}
 

public ModifiersTree removeModifiersModifier(ModifiersTree modifiers, Modifier modifier) {
    long c = ((JCModifiers) modifiers).flags & ~Flags.GENERATEDCONSTR;
    switch (modifier) {
        case ABSTRACT: c = c & ~Flags.ABSTRACT; break;
        case FINAL: c = c & ~Flags.FINAL; break;
        case NATIVE: c = c & ~Flags.NATIVE; break;
        case PRIVATE: c = c & ~Flags.PRIVATE; break;
        case PROTECTED: c = c & ~Flags.PROTECTED; break;
        case PUBLIC: c = c & ~Flags.PUBLIC; break;
        case STATIC: c = c & ~Flags.STATIC; break;
        case STRICTFP: c = c & ~Flags.STRICTFP; break;
        case SYNCHRONIZED: c = c & ~Flags.SYNCHRONIZED; break;
        case TRANSIENT: c = c & ~Flags.TRANSIENT; break;
        case VOLATILE: c = c & ~Flags.VOLATILE; break;
        case DEFAULT: c = c & ~Flags.DEFAULT; break;
        default:
            break;
    }
    return Modifiers(c, modifiers.getAnnotations());
}
 

private VarSymbol getDefinedSerializableFields(ClassSymbol def) {
    Names names = def.name.table.names;

    /* SERIALIZABLE_FIELDS can be private,
     * so must lookup by ClassSymbol, not by ClassDocImpl.
     */
    for (Scope.Entry e = def.members().lookup(names.fromString(SERIALIZABLE_FIELDS)); e.scope != null; e = e.next()) {
        if (e.sym.kind == Kinds.VAR) {
            VarSymbol f = (VarSymbol)e.sym;
            if ((f.flags() & Flags.STATIC) != 0 &&
                (f.flags() & Flags.PRIVATE) != 0) {
                return f;
            }
        }
    }
    return null;
}
 

private void computeDefaultSerializableFields(DocEnv env,
                                              ClassSymbol def,
                                              ClassDocImpl cd) {
    for (Scope.Entry e = def.members().elems; e != null; e = e.sibling) {
        if (e.sym != null && e.sym.kind == Kinds.VAR) {
            VarSymbol f = (VarSymbol)e.sym;
            if ((f.flags() & Flags.STATIC) == 0 &&
                (f.flags() & Flags.TRANSIENT) == 0) {
                //### No modifier filtering applied here.
                FieldDocImpl fd = env.getFieldDoc(f);
                //### Add to beginning.
                //### Preserve order used by old 'javadoc'.
                fields.prepend(fd);
            }
        }
    }
}
 

private void addMethodIfExist(DocEnv env, ClassSymbol def, String methodName) {
    Names names = def.name.table.names;

    for (Scope.Entry e = def.members().lookup(names.fromString(methodName)); e.scope != null; e = e.next()) {
        if (e.sym.kind == Kinds.MTH) {
            MethodSymbol md = (MethodSymbol)e.sym;
            if ((md.flags() & Flags.STATIC) == 0) {
                /*
                 * WARNING: not robust if unqualifiedMethodName is overloaded
                 *          method. Signature checking could make more robust.
                 * READOBJECT takes a single parameter, java.io.ObjectInputStream.
                 * WRITEOBJECT takes a single parameter, java.io.ObjectOutputStream.
                 */
                methods.append(env.getMethodDoc(md));
            }
        }
    }
}
 

/**
 * methods: remove method bodies, make methods native
 */
@Override
public void visitMethodDef(JCMethodDecl tree) {
    tree.mods = translate(tree.mods);
    tree.restype = translate(tree.restype);
    tree.typarams = translateTypeParams(tree.typarams);
    tree.params = translateVarDefs(tree.params);
    tree.thrown = translate(tree.thrown);
    if (tree.body != null) {
        if ((currClassMods & Flags.INTERFACE) != 0) {
            tree.mods.flags &= ~(Flags.DEFAULT | Flags.STATIC);
        } else {
            tree.mods.flags |= Flags.NATIVE;
        }
        tree.body = null;
    }
    result = tree;
}
 

private VarSymbol getDefinedSerializableFields(ClassSymbol def) {
    Names names = def.name.table.names;

    /* SERIALIZABLE_FIELDS can be private,
     */
    for (Symbol sym : def.members().getSymbolsByName(names.fromString(SERIALIZABLE_FIELDS))) {
        if (sym.kind == VAR) {
            VarSymbol f = (VarSymbol) sym;
            if ((f.flags() & Flags.STATIC) != 0
                    && (f.flags() & Flags.PRIVATE) != 0) {
                return f;
            }
        }
    }
    return null;
}
 

private void addMethodIfExist(ClassSymbol def, String methodName) {
    Names names = def.name.table.names;

    for (Symbol sym : def.members().getSymbolsByName(names.fromString(methodName))) {
        if (sym.kind == MTH) {
            MethodSymbol md = (MethodSymbol) sym;
            if ((md.flags() & Flags.STATIC) == 0) {
                /*
                 * WARNING: not robust if unqualifiedMethodName is overloaded
                 *          method. Signature checking could make more robust.
                 * READOBJECT takes a single parameter, java.io.ObjectInputStream.
                 * WRITEOBJECT takes a single parameter, java.io.ObjectOutputStream.
                 */
                methods.add(md);
            }
        }
    }
}
 

ListBuffer<JCTree> processConstants(Element constNode, HashMap<String, Integer> scope) {
    String baseName = constNode.getAttribute("basename");
    int count = 1;
    try {
        count = Integer.parseInt(constNode.getAttribute("count"));
    } catch (Exception e) {} // nothing to do, will use count = 1

    long declFlags = Flags.PUBLIC | Flags.STATIC | Flags.FINAL | Flags.ENUM;
    ListBuffer<JCTree> fields = new ListBuffer<>();

    for (int i = 0; i < count; i++) {
        String declName = baseName +
                          ((count == 1) ? "" : getUniqIndex(scope, baseName));

        JCVariableDecl constDecl = make.VarDef(
                                       make.Modifiers(declFlags),
                                       names.fromString(declName),
                                       null,  // no need for type in enum decl
                                       null); // no init

        fields.append(constDecl);
    }
    return fields;
}
 

long getFlagByName(String modifierName) {
    switch (modifierName) {
        case "public":
            return Flags.PUBLIC;
        case "private":
            return Flags.PRIVATE;
        case "protected":
            return Flags.PROTECTED;
        case "static":
            return Flags.STATIC;
        case "final":
            return Flags.FINAL;
        case "abstract":
            return Flags.ABSTRACT;
        case "strictfp":
            return Flags.STRICTFP;
        default:
            return 0;
    }
}
 

public Element getImplementationOf(ExecutableElement method, TypeElement origin) {
    MethodSymbol msym = (MethodSymbol)method;
    MethodSymbol implmethod = (msym).implementation((TypeSymbol)origin, jctypes, true);
    if ((msym.flags() & Flags.STATIC) != 0) {
        // return null if outside of hierarchy, or the method itself if origin extends method's class
        if (jctypes.isSubtype(((TypeSymbol)origin).type,  ((TypeSymbol)((MethodSymbol)method).owner).type)) {
            return method;
        } else {
            return null;
        }
    }
    if (implmethod == null || implmethod == method) {
        //look for default implementations
        if (allowDefaultMethods) {
            com.sun.tools.javac.util.List<MethodSymbol> candidates = jctypes.interfaceCandidates(((TypeSymbol) origin).type, (MethodSymbol) method);
            X: for (com.sun.tools.javac.util.List<MethodSymbol> ptr = candidates; ptr.head != null; ptr = ptr.tail) {
                MethodSymbol prov = ptr.head;
                if (prov != null && prov.overrides((MethodSymbol) method, (TypeSymbol) origin, jctypes, true) &&
                    hasImplementation(prov)) {
                    // PENDING: even if `prov' overrides the method, there may be a different method, in different interface, that overrides `method'
                    // 'prov' must override all such compatible methods in order to present a valid implementation of `method'.
                    for (com.sun.tools.javac.util.List<MethodSymbol> sibling = candidates; sibling.head != null; sibling = sibling.tail) {
                        MethodSymbol redeclare = sibling.head;

                        // if the default method does not override the alternative candidate from an interface, then the default will be rejected
                        // as specified in JLS #8, par. 8.4.8
                        if (!prov.overrides(redeclare, (TypeSymbol)origin, jctypes, allowDefaultMethods)) {
                            break X;
                        }
                    }
                    implmethod = prov;
                    break;
                }
            }
        }
    }
    return implmethod;
}
 

/**
 * Returns true if the method is a main method
 * @param method to be checked
 * @return true when the method is a main method
 */
public static boolean isMainMethod (final ExecutableElement method) {
    if (!"main".contentEquals(method.getSimpleName())) {                //NOI18N
        return false;
    }
    long flags = ((Symbol.MethodSymbol)method).flags();                 //faster
    if (((flags & Flags.PUBLIC) == 0) || ((flags & Flags.STATIC) == 0)) {
        return false;
    }
    if (method.getReturnType().getKind() != TypeKind.VOID) {
        return false;
    }
    List<? extends VariableElement> params = method.getParameters();
    if (params.size() != 1) {
        return false;
    }
    TypeMirror param = params.get(0).asType();
    if (param.getKind() != TypeKind.ARRAY) {
        return false;
    }
    ArrayType array = (ArrayType) param;
    TypeMirror compound = array.getComponentType();
    if (compound.getKind() != TypeKind.DECLARED) {
        return false;
    }
    return "java.lang.String".contentEquals(((TypeElement)((DeclaredType)compound).asElement()).getQualifiedName());   //NOI18N
}
 

private void computeDefaultSerializableFields(ClassSymbol te) {
    for (Symbol sym : te.members().getSymbols(NON_RECURSIVE)) {
        if (sym != null && sym.kind == VAR) {
            VarSymbol f = (VarSymbol) sym;
            if ((f.flags() & Flags.STATIC) == 0
                    && (f.flags() & Flags.TRANSIENT) == 0) {
                //### No modifier filtering applied here.
                //### Add to beginning.
                //### Preserve order used by old 'javadoc'.
                fields.add(f);
            }
        }
    }
}