| /* |
| * Copyright 2000-2014 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; |
| |
| import com.intellij.openapi.util.RecursionGuard; |
| import com.intellij.openapi.util.RecursionManager; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public abstract class PsiDiamondType extends PsiType { |
| public static final RecursionGuard ourDiamondGuard = RecursionManager.createGuard("diamondInference"); |
| |
| public PsiDiamondType(PsiAnnotation[] annotations) { |
| super(annotations); |
| } |
| |
| public abstract DiamondInferenceResult resolveInferredTypes(); |
| |
| public static class DiamondInferenceResult { |
| public static final DiamondInferenceResult EXPLICIT_CONSTRUCTOR_TYPE_ARGS = new DiamondInferenceResult() { |
| @NotNull |
| @Override |
| public PsiType[] getTypes() { |
| return PsiType.EMPTY_ARRAY; |
| } |
| |
| @Override |
| public String getErrorMessage() { |
| return "Cannot use diamonds with explicit type parameters for constructor"; |
| } |
| }; |
| |
| public static final DiamondInferenceResult NULL_RESULT = new DiamondInferenceResult() { |
| @NotNull |
| @Override |
| public PsiType[] getTypes() { |
| return PsiType.EMPTY_ARRAY; |
| } |
| |
| @Override |
| public String getErrorMessage() { |
| return "Cannot infer arguments"; |
| } |
| }; |
| |
| public static final DiamondInferenceResult ANONYMOUS_INNER_RESULT = new DiamondInferenceResult() { |
| @NotNull |
| @Override |
| public PsiType[] getTypes() { |
| return PsiType.EMPTY_ARRAY; |
| } |
| |
| @Override |
| public String getErrorMessage() { |
| return "Cannot use ''<>'' with anonymous inner classes"; |
| } |
| }; |
| |
| private final List<PsiType> myInferredTypes = new ArrayList<PsiType>(); |
| private String myErrorMessage; |
| private String myNewExpressionPresentableText; |
| |
| public DiamondInferenceResult() { } |
| |
| public DiamondInferenceResult(String expressionPresentableText) { |
| myNewExpressionPresentableText = expressionPresentableText; |
| } |
| |
| @NotNull |
| public PsiType[] getTypes() { |
| return myErrorMessage == null ? myInferredTypes.toArray(createArray(myInferredTypes.size())) : PsiType.EMPTY_ARRAY; |
| } |
| |
| /** |
| * @return all inferred types even if inference failed |
| */ |
| public List<PsiType> getInferredTypes() { |
| return myInferredTypes; |
| } |
| |
| public String getErrorMessage() { |
| return myErrorMessage; |
| } |
| |
| public boolean failedToInfer() { |
| return myErrorMessage != null; |
| } |
| |
| public void addInferredType(PsiType psiType) { |
| if (myErrorMessage != null) return; |
| if (psiType == null) { |
| myErrorMessage = "Cannot infer type arguments for " + myNewExpressionPresentableText; |
| } |
| else { |
| myInferredTypes.add(psiType); |
| } |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| |
| DiamondInferenceResult that = (DiamondInferenceResult)o; |
| |
| if (myErrorMessage != null ? !myErrorMessage.equals(that.myErrorMessage) : that.myErrorMessage != null) return false; |
| if (!myInferredTypes.equals(that.myInferredTypes)) return false; |
| |
| return true; |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = myInferredTypes.hashCode(); |
| result = 31 * result + (myErrorMessage != null ? myErrorMessage.hashCode() : 0); |
| return result; |
| } |
| } |
| } |