My first intention: Please take a look at it...

I started to create a new intention. It is working now - but I feel that I have missed the best way, especially when replacing the code ;).

Could you please show me, how to solve this problem "in the right way"?

Thanks



/*

• Copyright (c) 2005 Your Corporation. All Rights Reserved.

*/
package de.xore.plugins.idea.renaming;

import com.intellij.codeInsight.intention.IntentionAction;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiJavaFile;
import com.intellij.psi.PsiMethod;
import com.intellij.psi.PsiReturnStatement;
import com.intellij.psi.PsiReferenceExpression;
import com.intellij.psi.PsiManager;
import com.intellij.psi.PsiClassType;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.util.IncorrectOperationException;

/**

• <p/>

• Date: 08.03.2005<br> Time: 23:42:12<br>

*

• @author <a href="http://johannes-schneider.info">Johannes Schneider</a> - <a href="http://www.xore.de">Xore

• Systems</a>

*/
public class CollectionsWrapperIntention implements IntentionAction {
public String getText() {
return "Wrap collection";
}

public String getFamilyName() {
return "---WrapCollectionsFamily";
}

public boolean isAvailable( Project project, Editor editor, PsiFile file ) {
if ( !( file instanceof PsiJavaFile ) ) {
return false;
}

try {
PsiJavaFile javaFile = ( PsiJavaFile ) file;
PsiElement actualElement = javaFile.findElementAt( editor.getCaretModel().getOffset() );

PsiReturnStatement returnStatement = ( PsiReturnStatement ) PsiTreeUtil.getParentOfType( actualElement, PsiReturnStatement.class );
PsiMethod psiMethod = ( PsiMethod ) PsiTreeUtil.getParentOfType( actualElement, PsiMethod.class );

PsiReferenceExpression returnReference = ( PsiReferenceExpression ) PsiTreeUtil.getChildOfType( returnStatement, PsiReferenceExpression.class );

PsiManager manager = actualElement.getManager();
PsiClassType listType = manager.getElementFactory().createTypeByFQClassName( "java.util.List", actualElement.getResolveScope() );

if ( !listType.isAssignableFrom( returnReference.getType() ) ) {
return false;
}

if ( !psiMethod.getName().equalsIgnoreCase( "get" + returnReference.getText() ) ) {
return false;
}
} catch ( Throwable e ) {
return false;
}

return true;
}

public void invoke( Project project, Editor editor, PsiFile file ) throws IncorrectOperationException {
PsiJavaFile javaFile = ( PsiJavaFile ) file;
PsiElement actualElement = javaFile.findElementAt( editor.getCaretModel().getOffset() );

PsiReturnStatement returnStatement = ( PsiReturnStatement ) PsiTreeUtil.getParentOfType( actualElement, PsiReturnStatement.class );
PsiReferenceExpression returnReference = ( PsiReferenceExpression ) PsiTreeUtil.getChildOfType( returnStatement, PsiReferenceExpression.class );

int offset = returnReference.getTextOffset();
int length = returnReference.getTextLength();

editor.getDocument().replaceString( offset, offset + length, "Collections.unmodifiableList(" + returnReference.getText() + ")" );
}

public boolean startInWriteAction() {
return true;
}
}