| /* |
| * 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.intellij.psi.impl.source.resolve.graphInference.constraints; |
| |
| import com.intellij.psi.*; |
| import com.intellij.psi.impl.source.resolve.graphInference.InferenceSession; |
| import com.intellij.psi.util.PsiUtil; |
| import com.intellij.psi.util.TypeConversionUtil; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.List; |
| |
| /** |
| * User: anna |
| */ |
| public class TypeCompatibilityConstraint implements ConstraintFormula { |
| private PsiType myT; |
| private PsiType myS; |
| |
| public TypeCompatibilityConstraint(@NotNull PsiType t, @NotNull PsiType s) { |
| myT = t; |
| myS = s; |
| } |
| |
| @Override |
| public boolean reduce(InferenceSession session, List<ConstraintFormula> constraints) { |
| if (session.isProperType(myT) && session.isProperType(myS)) { |
| return TypeConversionUtil.isAssignable(myT, myS); |
| } |
| if (myS instanceof PsiPrimitiveType) { |
| final PsiClassType boxedType = ((PsiPrimitiveType)myS).getBoxedType(session.getManager(), session.getScope()); |
| if (boxedType != null) { |
| constraints.add(new TypeCompatibilityConstraint(myT, boxedType)); |
| return true; |
| } |
| } |
| if (myT instanceof PsiPrimitiveType) { |
| final PsiClassType boxedType = ((PsiPrimitiveType)myT).getBoxedType(session.getManager(), session.getScope()); |
| if (boxedType != null) { |
| constraints.add(new TypeEqualityConstraint(boxedType, myS)); |
| return true; |
| } |
| } |
| |
| if (isUncheckedConversion(myT, myS)) { |
| session.setErased(); |
| return true; |
| } |
| |
| constraints.add(new StrictSubtypingConstraint(myT, myS)); |
| return true; |
| } |
| |
| public static boolean isUncheckedConversion(final PsiType t, final PsiType s) { |
| if (t instanceof PsiClassType && !((PsiClassType)t).isRaw() && s instanceof PsiClassType) { |
| final PsiClassType.ClassResolveResult tResult = ((PsiClassType)t).resolveGenerics(); |
| final PsiClassType.ClassResolveResult sResult = ((PsiClassType)s).resolveGenerics(); |
| final PsiClass tClass = tResult.getElement(); |
| final PsiClass sClass = sResult.getElement(); |
| if (tClass != null && sClass != null) { |
| final PsiSubstitutor sSubstitutor = TypeConversionUtil.getClassSubstitutor(tClass, sClass, sResult.getSubstitutor()); |
| if (sSubstitutor != null && PsiUtil.isRawSubstitutor(tClass, sSubstitutor)) { |
| return true; |
| } |
| } |
| } |
| else if (t instanceof PsiArrayType && t.getArrayDimensions() == s.getArrayDimensions()) { |
| return isUncheckedConversion(t.getDeepComponentType(), s.getDeepComponentType()); |
| } |
| return false; |
| } |
| |
| @Override |
| public void apply(PsiSubstitutor substitutor, boolean cache) { |
| myT = substitutor.substitute(myT); |
| myS = substitutor.substitute(myS); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| |
| TypeCompatibilityConstraint that = (TypeCompatibilityConstraint)o; |
| |
| if (!myS.equals(that.myS)) return false; |
| if (!myT.equals(that.myT)) return false; |
| |
| return true; |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = myT.hashCode(); |
| result = 31 * result + myS.hashCode(); |
| return result; |
| } |
| |
| @Override |
| public String toString() { |
| return myS.getPresentableText() + " -> " + myT.getPresentableText(); |
| } |
| } |