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/*
* 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.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.PsiElement;
import com.intellij.util.Function;
import com.jetbrains.python.PyNames;
import com.jetbrains.python.psi.PyClass;
import com.jetbrains.python.psi.PyExpression;
import com.jetbrains.python.psi.impl.PyBuiltinCache;
import com.jetbrains.python.psi.impl.PyConstantExpressionEvaluator;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Arrays;
/**
* @author yole
*/
public class PyTupleType extends PyClassTypeImpl implements PySubscriptableType {
private final PyType[] myElementTypes;
PyTupleType(@NotNull PyClass tupleClass, PsiElement anchor, PyType[] elementTypes) {
super(tupleClass, false);
myElementTypes = elementTypes;
}
@Nullable
public static PyTupleType create(PsiElement anchor, PyType[] elementTypes) {
PyClass tuple = PyBuiltinCache.getInstance(anchor).getClass(PyNames.TUPLE);
if (tuple != null) {
return new PyTupleType(tuple, anchor, elementTypes);
}
return null;
}
public PyTupleType(PyTupleType origin, PyType[] elementTypes) {
super(origin.getPyClass(), false);
myElementTypes = elementTypes;
}
public String getName() {
return "(" + StringUtil.join(myElementTypes, new Function<PyType, String>() {
@Nullable
public String fun(PyType pyType) {
return pyType == null ? PyNames.UNKNOWN_TYPE : pyType.getName();
}
}, ", ") + ")";
}
@Override
public boolean isBuiltin(TypeEvalContext context) {
return true;
}
public PyType getElementType(PyExpression index, TypeEvalContext context) {
final Object value = PyConstantExpressionEvaluator.evaluate(index);
if (value instanceof Integer) {
return getElementType(((Integer)value).intValue());
}
return null;
}
public PyType getElementType(int index) {
if (index >= 0 && index < myElementTypes.length) {
return myElementTypes[index];
}
return null;
}
public int getElementCount() {
return myElementTypes.length;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
if (!super.equals(o)) return false;
PyTupleType that = (PyTupleType)o;
if (!Arrays.equals(myElementTypes, that.myElementTypes)) return false;
return true;
}
@Override
public int hashCode() {
int result = super.hashCode();
result = 31 * result + (myElementTypes != null ? Arrays.hashCode(myElementTypes) : 0);
return result;
}
}
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