| /* |
| * 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 org.jetbrains.plugins.groovy.refactoring.extract; |
| |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.Condition; |
| import com.intellij.psi.CommonClassNames; |
| import com.intellij.psi.JavaPsiFacade; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiType; |
| import com.intellij.util.containers.ContainerUtil; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrStatement; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrVariable; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.branch.GrReturnStatement; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression; |
| import org.jetbrains.plugins.groovy.lang.psi.dataFlow.reachingDefs.VariableInfo; |
| import org.jetbrains.plugins.groovy.lang.psi.impl.statements.expressions.TypesUtil; |
| import org.jetbrains.plugins.groovy.refactoring.introduce.StringPartInfo; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * @author Max Medvedev |
| */ |
| public class InitialInfo implements ExtractInfoHelper { |
| private final ParameterInfo[] myParameterInfos; |
| private final VariableInfo[] myOutputNames; |
| private final PsiType myOutputType; |
| private final PsiElement[] myInnerElements; |
| private final Project myProject; |
| private final GrStatement[] myStatements; |
| private final boolean myHasReturnValue; |
| private final String[] myArgumentNames; |
| private final StringPartInfo myStringPartInfo; |
| private final GrVariable myVariable; |
| |
| public InitialInfo(VariableInfo[] inputInfos, |
| VariableInfo[] outputInfos, |
| PsiElement[] innerElements, |
| GrStatement[] statements, |
| ArrayList<GrStatement> returnStatements, |
| StringPartInfo stringPartInfo, |
| Project project, GrVariable variable) { |
| myInnerElements = innerElements; |
| myStatements = statements; |
| myOutputNames = outputInfos; |
| myStringPartInfo = stringPartInfo; |
| myVariable = variable; |
| |
| myHasReturnValue = ContainerUtil.find(returnStatements, new Condition<GrStatement>() { |
| @Override |
| public boolean value(GrStatement statement) { |
| return statement instanceof GrReturnStatement && ((GrReturnStatement)statement).getReturnValue() != null; |
| } |
| }) != null; |
| |
| assert myStringPartInfo != null || myStatements.length > 0; |
| myProject = project; |
| |
| myParameterInfos = new ParameterInfo[inputInfos.length]; |
| myArgumentNames = new String[inputInfos.length]; |
| for (int i = 0; i < inputInfos.length; i++) { |
| VariableInfo info = inputInfos[i]; |
| PsiType type = info.getType(); |
| myParameterInfos[i] = new ParameterInfo(info.getName(), i, type); |
| myArgumentNames[i] = info.getName(); |
| } |
| |
| PsiType outputType = inferOutputType(outputInfos, statements, returnStatements, myHasReturnValue, stringPartInfo); |
| myOutputType = outputType != null ? outputType : PsiType.VOID; |
| } |
| |
| @Nullable |
| private PsiType inferOutputType(VariableInfo[] outputInfos, |
| GrStatement[] statements, |
| ArrayList<GrStatement> returnStatements, |
| boolean hasReturnValue, |
| StringPartInfo stringPartInfo) { |
| if (stringPartInfo != null) { |
| return stringPartInfo.getLiteral().getType(); |
| } |
| PsiType outputType = PsiType.VOID; |
| if (outputInfos.length > 0) { |
| if (outputInfos.length == 1) { |
| outputType = outputInfos[0].getType(); |
| } |
| else { |
| outputType = JavaPsiFacade.getElementFactory(myProject).createTypeFromText(CommonClassNames.JAVA_UTIL_LIST, getContext()); |
| } |
| } |
| else if (ExtractUtil.isSingleExpression(statements)) { |
| outputType = ((GrExpression)statements[0]).getType(); |
| } |
| else if (hasReturnValue) { |
| assert !returnStatements.isEmpty(); |
| List<PsiType> types = new ArrayList<PsiType>(returnStatements.size()); |
| for (GrStatement statement : returnStatements) { |
| if (statement instanceof GrReturnStatement) { |
| GrExpression returnValue = ((GrReturnStatement)statement).getReturnValue(); |
| if (returnValue != null) { |
| types.add(returnValue.getType()); |
| } |
| } |
| else if (statement instanceof GrExpression) { |
| types.add(((GrExpression)statement).getType()); |
| } |
| } |
| outputType = TypesUtil.getLeastUpperBoundNullable(types, getContext().getManager()); |
| } |
| |
| return outputType; |
| } |
| |
| @Override |
| @NotNull |
| public Project getProject() { |
| return myProject; |
| } |
| |
| @NotNull |
| @Override |
| public ParameterInfo[] getParameterInfos() { |
| return myParameterInfos; |
| } |
| |
| @Override |
| @NotNull |
| public VariableInfo[] getOutputVariableInfos() { |
| return myOutputNames; |
| } |
| |
| /** |
| * Get old names of parameters to be pasted as method call arguments |
| * |
| * @return array of argument names |
| */ |
| @NotNull |
| @Override |
| public String[] getArgumentNames() { |
| return myArgumentNames; |
| } |
| |
| @Override |
| @NotNull |
| public PsiType getOutputType() { |
| return myOutputType; |
| } |
| |
| @Override |
| @NotNull |
| public PsiElement[] getInnerElements() { |
| return myInnerElements; |
| } |
| |
| @Override |
| @NotNull |
| public GrStatement[] getStatements() { |
| return myStatements; |
| } |
| |
| @Override |
| public boolean hasReturnValue() { |
| return myHasReturnValue; |
| } |
| |
| @Override |
| public String getName() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public PsiElement getContext() { |
| return myStatements.length > 0 ? myStatements[0] : myStringPartInfo.getLiteral(); |
| } |
| |
| @Override |
| public boolean isForceReturn() { |
| return false; |
| } |
| |
| @Override |
| @Nullable |
| public StringPartInfo getStringPartInfo() { |
| return myStringPartInfo; |
| } |
| |
| @Nullable |
| @Override |
| public GrVariable getVar() { |
| return myVariable; |
| } |
| } |