com.intellij.codeInsight.generation.surroundWith.JavaWithTryCatchSurrounder.java Source code

Introduction

Here is the source code for com.intellij.codeInsight.generation.surroundWith.JavaWithTryCatchSurrounder.java

Source

/*
 * Copyright 2000-2009 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.codeInsight.generation.surroundWith;

import com.intellij.codeInsight.CodeInsightBundle;
import com.intellij.codeInsight.ExceptionUtil;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.Messages;
import com.intellij.openapi.util.TextRange;
import com.intellij.psi.*;
import com.intellij.psi.codeStyle.CodeStyleManager;
import com.intellij.psi.codeStyle.JavaCodeStyleManager;
import com.intellij.psi.codeStyle.VariableKind;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NonNls;

import java.util.Collections;
import java.util.List;

public class JavaWithTryCatchSurrounder extends JavaStatementsSurrounder {
    protected boolean myGenerateFinally = false;

    @Override
    public String getTemplateDescription() {
        return CodeInsightBundle.message("surround.with.try.catch.template");
    }

    @Override
    public TextRange surroundStatements(Project project, Editor editor, PsiElement container,
            PsiElement[] statements) throws IncorrectOperationException {
        PsiManager manager = PsiManager.getInstance(project);
        PsiElementFactory factory = JavaPsiFacade.getInstance(manager.getProject()).getElementFactory();
        JavaCodeStyleManager codeStyleManager = JavaCodeStyleManager.getInstance(project);

        statements = SurroundWithUtil.moveDeclarationsOut(container, statements, true);
        if (statements.length == 0) {
            return null;
        }

        List<PsiClassType> exceptions = ExceptionUtil.getUnhandledExceptions(statements);
        if (exceptions.isEmpty()) {
            exceptions = ExceptionUtil.getThrownExceptions(statements);
            if (exceptions.isEmpty()) {
                exceptions = Collections.singletonList(
                        factory.createTypeByFQClassName("java.lang.Exception", container.getResolveScope()));
            }
        }

        @NonNls
        StringBuilder buffer = new StringBuilder();
        buffer.append("try{\n}");
        for (PsiClassType exception : exceptions) {
            buffer.append("catch(Exception e){\n}");
        }
        if (myGenerateFinally) {
            buffer.append("finally{\n}");
        }
        String text = buffer.toString();
        PsiTryStatement tryStatement = (PsiTryStatement) factory.createStatementFromText(text, null);
        tryStatement = (PsiTryStatement) CodeStyleManager.getInstance(project).reformat(tryStatement);

        tryStatement = (PsiTryStatement) container.addAfter(tryStatement, statements[statements.length - 1]);

        PsiCodeBlock tryBlock = tryStatement.getTryBlock();
        SurroundWithUtil.indentCommentIfNecessary(tryBlock, statements);
        tryBlock.addRange(statements[0], statements[statements.length - 1]);

        PsiCatchSection[] catchSections = tryStatement.getCatchSections();

        for (int i = 0; i < exceptions.size(); i++) {
            PsiClassType exception = exceptions.get(i);
            String[] nameSuggestions = codeStyleManager.suggestVariableName(VariableKind.PARAMETER, null, null,
                    exception).names;
            String name = codeStyleManager.suggestUniqueVariableName(nameSuggestions[0], tryBlock, false);
            PsiCatchSection catchSection;
            try {
                catchSection = factory.createCatchSection(exception, name, null);
            } catch (IncorrectOperationException e) {
                Messages.showErrorDialog(project,
                        CodeInsightBundle.message("surround.with.try.catch.incorrect.template.message"),
                        CodeInsightBundle.message("surround.with.try.catch.incorrect.template.title"));
                return null;
            }
            catchSection = (PsiCatchSection) catchSections[i].replace(catchSection);
            codeStyleManager.shortenClassReferences(catchSection);
        }

        container.deleteChildRange(statements[0], statements[statements.length - 1]);

        PsiCodeBlock firstCatch = tryStatement.getCatchBlocks()[0];
        return SurroundWithUtil.getRangeToSelect(firstCatch);
    }
}