import org.apache.lucene.codecs.LiveDocsFormat; //导入依赖的package包/类
@Override
public void eval(MockDirectoryWrapper dir)  throws IOException {
  if (!doFail) {
    return;
  }
  StackTraceElement[] trace = new Exception().getStackTrace();
  for (int i = 0; i < trace.length; i++) {
    if (SegmentMerger.class.getName().equals(trace[i].getClassName()) && "mergeTerms".equals(trace[i].getMethodName()) && !didFail1) {
      didFail1 = true;
      throw new IOException("fake disk full during mergeTerms");
    }
    if (LiveDocsFormat.class.getName().equals(trace[i].getClassName()) && "writeLiveDocs".equals(trace[i].getMethodName()) && !didFail2) {
      didFail2 = true;
      throw new IOException("fake disk full while writing LiveDocs");
    }
  }
}
 

import org.apache.lucene.codecs.LiveDocsFormat; //导入依赖的package包/类
@Override
public final LiveDocsFormat liveDocsFormat() {
  return liveDocsFormat;
}
 

import org.apache.lucene.codecs.LiveDocsFormat; //导入依赖的package包/类
@Override
public LiveDocsFormat liveDocsFormat() {
  return liveDocsFormat;
}
 

import org.apache.lucene.codecs.LiveDocsFormat; //导入依赖的package包/类
@Override
public LiveDocsFormat liveDocsFormat() {
  return liveDocs;
}
 

import org.apache.lucene.codecs.LiveDocsFormat; //导入依赖的package包/类
@Override
public LiveDocsFormat liveDocsFormat() {
  return new CrankyLiveDocsFormat(delegate.liveDocsFormat(), random);
}
 

import org.apache.lucene.codecs.LiveDocsFormat; //导入依赖的package包/类
CrankyLiveDocsFormat(LiveDocsFormat delegate, Random random) {
  this.delegate = delegate;
  this.random = random;
}