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/*
* 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.unwrap;
import com.intellij.psi.*;
import com.intellij.util.IncorrectOperationException;
public abstract class JavaUnwrapper extends AbstractUnwrapper<JavaUnwrapper.Context> {
public JavaUnwrapper(String description) {
super(description);
}
@Override
protected Context createContext() {
return new Context();
}
protected static class Context extends AbstractUnwrapper.AbstractContext {
public void extractFromBlockOrSingleStatement(PsiStatement block, PsiElement from) throws IncorrectOperationException {
if (block instanceof PsiBlockStatement) {
extractFromCodeBlock(((PsiBlockStatement)block).getCodeBlock(), from);
}
else if (block != null && !(block instanceof PsiEmptyStatement)) {
extract(block, block, from);
}
}
public void extractFromCodeBlock(PsiCodeBlock block, PsiElement from) throws IncorrectOperationException {
if (block == null) return;
extract(block.getFirstBodyElement(), block.getLastBodyElement(), from);
}
public void setElseBranch(PsiIfStatement ifStatement, PsiStatement elseBranch) throws IncorrectOperationException {
PsiStatement toExtract = elseBranch;
if (myIsEffective) {
ifStatement.setElseBranch(copyElement(elseBranch));
toExtract = ifStatement.getElseBranch();
}
addElementToExtract(toExtract);
}
@Override
protected boolean isWhiteSpace(PsiElement element) {
return element instanceof PsiWhiteSpace;
}
private static PsiStatement copyElement(PsiStatement e) throws IncorrectOperationException {
// We cannot call el.copy() for 'else' since it sets context to parent 'if'.
// This causes copy to be invalidated after parent 'if' is removed by setElseBranch method.
PsiElementFactory factory = JavaPsiFacade.getInstance(e.getProject()).getElementFactory();
return factory.createStatementFromText(e.getText(), null);
}
public void setInitializer(PsiVariable variable, PsiExpression returnValue) {
PsiExpression toExtract = returnValue;
if (myIsEffective) {
final PsiExpression initializer = copyExpression(returnValue);
if (variable instanceof PsiLocalVariable) {
((PsiLocalVariable)variable).setInitializer(initializer);
} else if (variable instanceof PsiField) {
((PsiField)variable).setInitializer(initializer);
}
toExtract = variable.getInitializer();
}
addElementToExtract(toExtract);
}
private static PsiExpression copyExpression(PsiExpression returnValue) {
return JavaPsiFacade.getElementFactory(returnValue.getProject()).createExpressionFromText(returnValue.getText(), null);
}
public void setReturnValue(PsiReturnStatement returnStatement, PsiExpression returnValue) {
PsiElement toExtract = returnValue;
if (myIsEffective) {
final PsiExpression copyExpression = copyExpression(returnValue);
final PsiExpression initialValue = returnStatement.getReturnValue();
assert initialValue != null;
toExtract = initialValue.replace(copyExpression);
}
addElementToExtract(toExtract);
}
}
}
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