| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.jetbrains.python.psi.types; |
| |
| import com.jetbrains.python.PyNames; |
| import com.jetbrains.python.psi.PyClass; |
| import org.jetbrains.annotations.NotNull; |
| |
| /** |
| * @author vlan |
| */ |
| public class PyABCUtil { |
| private PyABCUtil() { |
| } |
| |
| public static boolean isSubclass(@NotNull PyClass subClass, @NotNull PyClass superClass) { |
| final String superName = superClass.getName(); |
| if (superName != null) { |
| return isSubclass(subClass, superName, true); |
| } |
| return false; |
| } |
| |
| public static boolean isSubclass(@NotNull PyClass subClass, @NotNull String superClassName) { |
| return isSubclass(subClass, superClassName, true); |
| } |
| |
| public static boolean isSubclass(@NotNull PyClass subClass, @NotNull String superClassName, boolean inherited) { |
| if (PyNames.CALLABLE.equals(superClassName)) { |
| return hasMethod(subClass, PyNames.CALL, inherited); |
| } |
| if (PyNames.HASHABLE.equals(superClassName)) { |
| return hasMethod(subClass, PyNames.HASH, inherited); |
| } |
| final boolean hasIter = hasMethod(subClass, PyNames.ITER, inherited); |
| final boolean hasGetItem = hasMethod(subClass, PyNames.GETITEM, inherited); |
| if (PyNames.ITERABLE.equals(superClassName)) { |
| return hasIter || hasGetItem; |
| } |
| if (PyNames.ITERATOR.equals(superClassName)) { |
| return (hasIter && (hasMethod(subClass, PyNames.NEXT, inherited) || hasMethod(subClass, |
| PyNames.DUNDER_NEXT, inherited))) || hasGetItem; |
| } |
| final boolean isSized = hasMethod(subClass, PyNames.LEN, inherited); |
| if (PyNames.SIZED.equals(superClassName)) { |
| return isSized; |
| } |
| final boolean isContainer = hasMethod(subClass, PyNames.CONTAINS, inherited); |
| if (PyNames.CONTAINER.equals(superClassName)) { |
| return isContainer; |
| } |
| if (PyNames.SEQUENCE.equals(superClassName)) { |
| return isSized && hasIter && isContainer && hasGetItem; |
| } |
| if (PyNames.MAPPING.equals(superClassName)) { |
| return isSized && hasIter && isContainer && hasGetItem && hasMethod(subClass, PyNames.KEYS, inherited); |
| } |
| if (PyNames.ABC_COMPLEX.equals(superClassName)) { |
| return hasMethod(subClass, "__complex__", inherited); |
| } |
| if (PyNames.ABC_REAL.equals(superClassName)) { |
| return hasMethod(subClass, "__float__", inherited); |
| } |
| if (PyNames.ABC_INTEGRAL.equals(superClassName)) { |
| return hasMethod(subClass, "__int__", inherited); |
| } |
| if (PyNames.ABC_NUMBER.equals(superClassName) && "Decimal".equals(subClass.getName())) { |
| return true; |
| } |
| return false; |
| } |
| |
| public static boolean isSubtype(@NotNull PyType type, @NotNull String superClassName, @NotNull TypeEvalContext context) { |
| if (type instanceof PyClassType) { |
| final PyClassType classType = (PyClassType)type; |
| final PyClass pyClass = classType.getPyClass(); |
| if (classType.isDefinition()) { |
| final PyClassLikeType metaClassType = classType.getMetaClassType(context, true); |
| if (metaClassType instanceof PyClassType) { |
| final PyClassType metaClass = (PyClassType)metaClassType; |
| return isSubclass(metaClass.getPyClass(), superClassName, true); |
| } |
| } |
| else { |
| return isSubclass(pyClass, superClassName, true); |
| } |
| } |
| if (type instanceof PyUnionType) { |
| final PyUnionType unionType = (PyUnionType)type; |
| for (PyType m : unionType.getMembers()) { |
| if (m != null) { |
| if (!isSubtype(m, superClassName, context)) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| private static boolean hasMethod(PyClass cls, String name, boolean inherited) { |
| return cls.findMethodByName(name, inherited) != null || cls.findClassAttribute(name, inherited) != null; |
| } |
| } |