| /* |
| * Copyright 2000-2012 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.util.ArrayFactory; |
| import com.intellij.util.Function; |
| import com.intellij.util.NullableFunction; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Represents a Java expression. |
| */ |
| public interface PsiExpression extends PsiAnnotationMemberValue { |
| /** |
| * The empty array of PSI expressions which can be reused to avoid unnecessary allocations. |
| */ |
| PsiExpression[] EMPTY_ARRAY = new PsiExpression[0]; |
| |
| ArrayFactory<PsiExpression> ARRAY_FACTORY = new ArrayFactory<PsiExpression>() { |
| @NotNull |
| @Override |
| public PsiExpression[] create(final int count) { |
| return count == 0 ? PsiExpression.EMPTY_ARRAY : new PsiExpression[count]; |
| } |
| }; |
| |
| Function<PsiExpression, PsiType> EXPRESSION_TO_TYPE = new NullableFunction<PsiExpression, PsiType>() { |
| @Override |
| public PsiType fun(final PsiExpression expression) { |
| return expression.getType(); |
| } |
| }; |
| |
| /** |
| * Returns the type of the expression. |
| * |
| * @return the expression type, or null if the type is not known. |
| */ |
| @Nullable |
| PsiType getType(); |
| } |