| /* |
| * Copyright 2003-2011 Dave Griffith, Bas Leijdekkers |
| * |
| * 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.siyeh.ipp.concatenation; |
| |
| import com.intellij.psi.*; |
| import com.siyeh.ipp.base.PsiElementPredicate; |
| import org.jetbrains.annotations.Nullable; |
| |
| class MethodCallChainPredicate implements PsiElementPredicate { |
| |
| public boolean satisfiedBy(PsiElement element) { |
| if (!isCallChain(element)) { |
| return false; |
| } |
| final PsiElement parent = element.getParent(); |
| if (parent instanceof PsiExpressionStatement) { |
| return true; |
| } |
| else if (parent instanceof PsiLocalVariable) { |
| final PsiElement grandParent = parent.getParent(); |
| if (!(grandParent instanceof PsiDeclarationStatement)) { |
| return false; |
| } |
| final PsiDeclarationStatement declarationStatement = (PsiDeclarationStatement)grandParent; |
| return declarationStatement.getDeclaredElements().length == 1; |
| } |
| else if (parent instanceof PsiAssignmentExpression) { |
| final PsiElement grandParent = parent.getParent(); |
| return grandParent instanceof PsiExpressionStatement; |
| } |
| return false; |
| } |
| |
| private static boolean isCallChain(PsiElement element) { |
| PsiClassType aClassType1 = getQualifierExpressionType(element); |
| if (aClassType1 == null) { |
| return false; |
| } |
| boolean first = true; |
| while (true) { |
| final PsiMethodCallExpression methodCallExpression = (PsiMethodCallExpression)element; |
| final PsiReferenceExpression methodExpression = methodCallExpression.getMethodExpression(); |
| final PsiExpression qualifierExpression = methodExpression.getQualifierExpression(); |
| PsiClassType expressionType = getQualifierExpressionType(qualifierExpression); |
| if (!first) { |
| if (expressionType == null) { |
| if (qualifierExpression instanceof PsiMethodCallExpression && |
| ((PsiMethodCallExpression)qualifierExpression).getMethodExpression().getQualifierExpression() == null) { |
| return false; |
| } |
| return true; |
| } |
| } else { |
| first = false; |
| } |
| if (!aClassType1.equals(expressionType)) { |
| return false; |
| } |
| aClassType1 = expressionType; |
| element = qualifierExpression; |
| } |
| } |
| |
| @Nullable |
| private static PsiClassType getQualifierExpressionType(PsiElement element) { |
| if (!(element instanceof PsiMethodCallExpression)) { |
| return null; |
| } |
| |
| final PsiMethodCallExpression methodCallExpression = (PsiMethodCallExpression)element; |
| final PsiReferenceExpression methodExpression = methodCallExpression.getMethodExpression(); |
| final PsiExpression qualifierExpression = methodExpression.getQualifierExpression(); |
| final PsiType type = qualifierExpression != null ? qualifierExpression.getType() : null; |
| return type instanceof PsiClassType ? (PsiClassType)type : null; |
| } |
| } |