package bran.japidplugin;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.ltk.core.refactoring.Change;
import org.eclipse.ltk.core.refactoring.ChangeDescriptor;
import org.eclipse.ltk.core.refactoring.resource.ResourceChange;
import org.playframework.playclipse.PlayPlugin;
import org.playframework.playclipse.builder.JapidCleanVisitor;
import cn.bran.play.JapidPlugin;
public abstract class RenameTemplateChangeBase extends ResourceChange{
protected final String fNewName;
// source in the japidviews to be renamed
protected final IPath fResourcePath;
protected final long fStampToRestore;
protected ChangeDescriptor fDescriptor;
/**
* Creates the change.
*
* @param resourcePath the path of the resource to rename
* @param newName the new name. Must not be empty.
*/
public RenameTemplateChangeBase(IPath resourcePath, String newName) {
this(resourcePath, newName, IResource.NULL_STAMP);
}
/**
* Creates the change with a time stamp to restore.
*
* @param resourcePath the path of the resource to rename
* @param newName the new name. Must not be empty.
* @param stampToRestore the time stamp to restore or {@link IResource#NULL_STAMP} to not restore the
* time stamp.
*/
protected RenameTemplateChangeBase(IPath resourcePath, String newName, long stampToRestore) {
if (resourcePath == null || newName == null || newName.length() == 0) {
throw new IllegalArgumentException();
}
String resPathName = resourcePath.toString();
if (!resPathName.contains("japidviews"))
throw new IllegalArgumentException("resource to rename must be in the 'japidviews' tree: " + resPathName);
fResourcePath= resourcePath;
fNewName= newName;
fStampToRestore= stampToRestore;
fDescriptor= null;
setValidationMethod(VALIDATE_NOT_DIRTY);
}
@Override
public ChangeDescriptor getDescriptor() {
return fDescriptor;
}
public void setDescriptor(ChangeDescriptor descriptor) {
fDescriptor= descriptor;
}
@Override
protected IResource getModifiedResource() {
return ResourcesPlugin.getWorkspace().getRoot().findMember(fResourcePath);
}
protected IResource getJapidViewsResource() {
return ResourcesPlugin.getWorkspace().getRoot().findMember(getJapidviewsPath());
}
protected IResource getDestinationResource() {
IPath desPath = getDestinationResourcePath(fResourcePath, fNewName);
return ResourcesPlugin.getWorkspace().getRoot().findMember(desPath);
}
/**
* Returns the new name.
*
* @return return the new name
*/
public String getNewName() {
return fNewName;
}
@Override
public Change perform(IProgressMonitor pm) throws CoreException {
try {
pm.beginTask(getName(), 1);
IResource srcRes= getModifiedResource();
long currentStamp= srcRes.getModificationStamp();
IResource desRes = getDestinationResource();
if (desRes != null)
return null;
IPath destPath= getDestinationResourcePath();
prePerform(srcRes, destPath);
srcRes.move(destPath, IResource.SHALLOW, pm);
postPerform(srcRes, destPath);
if (fStampToRestore != IResource.NULL_STAMP) {
IResource newResource= ResourcesPlugin.getWorkspace().getRoot().findMember(destPath);
newResource.revertModificationStamp(fStampToRestore);
}
String oldName= fResourcePath.lastSegment();
return new RenameTemplateChange(destPath, oldName, currentStamp);
}
catch(Exception e) {
PlayPlugin.showError(e.getMessage());
if (e instanceof NullPointerException)
throw new CoreException(null);
}
finally {
pm.done();
}
return null;
}
abstract protected void prePerform(IResource srcRes, IPath newPath) throws CoreException;
abstract protected void postPerform(IResource srcRes, IPath newPath) throws CoreException;
private IPath getDestinationResourcePath() {
return getDestinationResourcePath(fResourcePath, fNewName);
}
protected IPath getDestinationResourcePath(IPath srcPath, String newName) {
return srcPath.removeLastSegments(1).append(newName);
}
/**
* @param path
* @return
*/
protected IPath getJapidviewsPath() {
String[] segments = fResourcePath.segments();
int i = 0;
for (; i < segments.length; i++) {
if ("japidviews".equals(segments[i])) {
break;
}
}
IPath japidPath = fResourcePath.uptoSegment(++i);
return japidPath;
}
/**
* an expensive operation since it would trigger the regeneration of
* @throws CoreException
*/
protected void cleanJapidviews() throws CoreException {
IResource japids = getJapidViewsResource();
japids.accept(new JapidCleanVisitor());
}
}