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/*
* Copyright 2000-2010 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 org.jetbrains.idea.svn.dialogs;
import com.intellij.openapi.vcs.CollectionSplitter;
import com.intellij.openapi.vcs.versionBrowser.CommittedChangeList;
import java.util.List;
public class SvnChangeListsPageEngine implements PageEngine<List<CommittedChangeList>> {
private List<List<CommittedChangeList>> mySplitData;
private int myIdx;
public SvnChangeListsPageEngine(final List<CommittedChangeList> data, final int pageSize) {
final CollectionSplitter<CommittedChangeList> splitter = new CollectionSplitter<CommittedChangeList>(pageSize);
mySplitData = splitter.split(data);
myIdx = 0;
}
public List<CommittedChangeList> getCurrent() {
return mySplitData.get(myIdx);
}
public boolean hasNext() {
return myIdx < (mySplitData.size() - 1);
}
public boolean hasPrevious() {
return myIdx > 0;
}
public List<CommittedChangeList> next() {
if (! hasNext()) return null;
++ myIdx;
return mySplitData.get(myIdx);
}
public List<CommittedChangeList> previous() {
if (! hasPrevious()) return null;
-- myIdx;
return mySplitData.get(myIdx);
}
}
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