plugins/svn4idea/src/org/jetbrains/idea/svn/history/SvnMergeSourceTracker.java

/*
 * 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.history;

import com.intellij.openapi.util.Pair;
import com.intellij.util.ThrowableConsumer;
import org.tmatesoft.svn.core.SVNException;

public class SvnMergeSourceTracker {
  private int myMergeLevel;
  // -1 - not merge source; 0 - direct merge source
  private ThrowableConsumer<Pair<LogEntry, Integer>, SVNException> myConsumer;

  public SvnMergeSourceTracker(final ThrowableConsumer<Pair<LogEntry, Integer>, SVNException> consumer) {
    myConsumer = consumer;
    myMergeLevel = -1;
  }

  public void consume(final LogEntry logEntry) throws SVNException {
    if (logEntry.getRevision() < 0) {
      -- myMergeLevel;
      return;
    }
    myConsumer.consume(new Pair<LogEntry, Integer>(logEntry, myMergeLevel));
    if (logEntry.hasChildren()) {
      ++ myMergeLevel;
    }
  }
}