| /* |
| * Copyright 2003-2013 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.forloop; |
| |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.psi.codeStyle.CodeStyleSettings; |
| import com.intellij.psi.codeStyle.CodeStyleSettingsManager; |
| import com.intellij.psi.codeStyle.JavaCodeStyleManager; |
| import com.intellij.util.IncorrectOperationException; |
| import com.siyeh.ig.PsiReplacementUtil; |
| import com.siyeh.ig.psiutils.ParenthesesUtils; |
| import com.siyeh.ipp.base.Intention; |
| import com.siyeh.ipp.base.PsiElementPredicate; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| |
| public class ReplaceForEachLoopWithIteratorForLoopIntention extends Intention { |
| |
| @Override |
| @NotNull |
| public PsiElementPredicate getElementPredicate() { |
| return new IterableForEachLoopPredicate(); |
| } |
| |
| @Override |
| public void processIntention(@NotNull PsiElement element) throws IncorrectOperationException { |
| final PsiForeachStatement statement = (PsiForeachStatement)element.getParent(); |
| if (statement == null) { |
| return; |
| } |
| final PsiExpression iteratedValue = statement.getIteratedValue(); |
| if (iteratedValue == null) { |
| return; |
| } |
| final PsiType iteratedValueType = iteratedValue.getType(); |
| if (!(iteratedValueType instanceof PsiClassType)) { |
| return; |
| } |
| @NonNls final StringBuilder methodCall = new StringBuilder(); |
| if (ParenthesesUtils.getPrecedence(iteratedValue) > ParenthesesUtils.METHOD_CALL_PRECEDENCE) { |
| methodCall.append('(').append(iteratedValue.getText()).append(')'); |
| } |
| else { |
| methodCall.append(iteratedValue.getText()); |
| } |
| methodCall.append(".iterator()"); |
| final Project project = statement.getProject(); |
| final PsiElementFactory factory = JavaPsiFacade.getInstance(project).getElementFactory(); |
| final PsiExpression iteratorCall = factory.createExpressionFromText(methodCall.toString(), iteratedValue); |
| final PsiType variableType = GenericsUtil.getVariableTypeByExpressionType(iteratorCall.getType()); |
| if (variableType == null) { |
| return; |
| } |
| @NonNls final StringBuilder newStatement = new StringBuilder(); |
| newStatement.append("for(").append(variableType.getCanonicalText()).append(' '); |
| final JavaCodeStyleManager codeStyleManager = JavaCodeStyleManager.getInstance(project); |
| final String iterator = codeStyleManager.suggestUniqueVariableName("iterator", statement, true); |
| newStatement.append(iterator).append("=").append(iteratorCall.getText()).append(';'); |
| newStatement.append(iterator).append(".hasNext();) {"); |
| final CodeStyleSettings codeStyleSettings = CodeStyleSettingsManager.getSettings(project); |
| if (codeStyleSettings.GENERATE_FINAL_LOCALS) { |
| newStatement.append("final "); |
| } |
| final PsiParameter iterationParameter = statement.getIterationParameter(); |
| final PsiType parameterType = iterationParameter.getType(); |
| final String typeText = parameterType.getCanonicalText(); |
| newStatement.append(typeText).append(' ').append(iterationParameter.getName()).append(" = ").append(iterator).append(".next();"); |
| final PsiStatement body = statement.getBody(); |
| if (body == null) { |
| return; |
| } |
| if (body instanceof PsiBlockStatement) { |
| final PsiCodeBlock block = ((PsiBlockStatement)body).getCodeBlock(); |
| final PsiElement[] children = block.getChildren(); |
| for (int i = 1; i < children.length - 1; i++) { |
| //skip the braces |
| newStatement.append(children[i].getText()); |
| } |
| } |
| else { |
| newStatement.append(body.getText()); |
| } |
| newStatement.append('}'); |
| PsiReplacementUtil.replaceStatementAndShortenClassNames(statement, newStatement.toString()); |
| } |
| } |