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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.openapi.vcs.changes;
import com.intellij.openapi.vcs.changes.local.*;
import com.intellij.util.containers.MultiMap;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.LinkedList;
import java.util.List;
/** synchronization aspect is external for this class; only logic here
* have internal command queue; applies commands to another copy of change lists (ChangeListWorker) and sends notifications
* (after update is done)
*/
public class Modifier implements ChangeListsWriteOperations {
private ChangeListWorker myWorker;
private boolean myInsideUpdate;
private final List<ChangeListCommand> myCommandQueue;
private final DelayedNotificator myNotificator;
public Modifier(final ChangeListWorker worker, final DelayedNotificator notificator) {
myWorker = worker;
myNotificator = notificator;
myCommandQueue = new LinkedList<ChangeListCommand>();
}
public LocalChangeList addChangeList(@NotNull final String name, @Nullable final String comment, @Nullable Object data) {
final AddList command = new AddList(name, comment, data);
impl(command);
return command.getNewListCopy();
}
public String setDefault(final String name) {
final SetDefault command = new SetDefault(name);
impl(command);
return command.getPrevious();
}
public boolean removeChangeList(@NotNull final String name) {
final RemoveList command = new RemoveList(name);
impl(command);
return command.isRemoved();
}
public MultiMap<LocalChangeList, Change> moveChangesTo(final String name, final Change[] changes) {
final MoveChanges command = new MoveChanges(name, changes);
impl(command);
return command.getMovedFrom();
}
private void impl(final ChangeListCommand command) {
command.apply(myWorker);
if (myInsideUpdate) {
myCommandQueue.add(command);
// notify after change lsist are synchronized
} else {
// notify immediately
myNotificator.callNotify(command);
}
}
public boolean setReadOnly(final String name, final boolean value) {
final SetReadOnly command = new SetReadOnly(name, value);
impl(command);
return command.isResult();
}
public boolean editName(@NotNull final String fromName, @NotNull final String toName) {
final EditName command = new EditName(fromName, toName);
impl(command);
return command.isResult();
}
public String editComment(@NotNull final String fromName, final String newComment) {
final EditComment command = new EditComment(fromName, newComment);
impl(command);
return command.getOldComment();
}
public boolean isInsideUpdate() {
return myInsideUpdate;
}
public void enterUpdate() {
myInsideUpdate = true;
}
public void finishUpdate(final ChangeListWorker worker) {
exitUpdate();
// should be applied for notifications to be delivered (they were delayed)
apply(worker);
clearQueue();
}
private void exitUpdate() {
myInsideUpdate = false;
}
private void clearQueue() {
myCommandQueue.clear();
}
private void apply(final ChangeListWorker worker) {
for (ChangeListCommand command : myCommandQueue) {
command.apply(worker);
myNotificator.callNotify(command);
}
}
public void setWorker(ChangeListWorker worker) {
myWorker = worker;
}
}
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