Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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.floragunn.searchguard.configuration; import java.io.IOException; import java.util.Collections; import java.util.Iterator; import org.apache.lucene.index.BinaryDocValues; import org.apache.lucene.index.FieldInfo; import org.apache.lucene.index.FieldInfos; import org.apache.lucene.index.Fields; import org.apache.lucene.index.LeafReader; import org.apache.lucene.index.NumericDocValues; import org.apache.lucene.index.PostingsEnum; import org.apache.lucene.index.SortedDocValues; import org.apache.lucene.index.SortedNumericDocValues; import org.apache.lucene.index.SortedSetDocValues; import org.apache.lucene.index.StoredFieldVisitor; import org.apache.lucene.index.Terms; import org.apache.lucene.index.TermsEnum; import org.apache.lucene.index.TermsEnum.SeekStatus; import org.apache.lucene.util.Bits; import org.apache.lucene.util.BytesRef; import com.google.common.collect.Iterators; class EmptyReader extends LeafReader { public EmptyReader() { super(); tryIncRef(); } @Override public void addCoreClosedListener(final CoreClosedListener listener) { } @Override public void removeCoreClosedListener(final CoreClosedListener listener) { } @Override public Fields fields() throws IOException { return new Fields() { @Override public Iterator<String> iterator() { return Collections.<String>emptyList().iterator(); } @Override public Terms terms(final String field) throws IOException { return new Terms() { @Override public long size() throws IOException { // TODO Auto-generated method stub return 0; } @Override public TermsEnum iterator() throws IOException { // TODO Auto-generated method stub return new TermsEnum() { @Override public BytesRef next() throws IOException { // TODO Auto-generated method stub return null; } @Override public long totalTermFreq() throws IOException { // TODO Auto-generated method stub return 0; } @Override public BytesRef term() throws IOException { // TODO Auto-generated method stub return null; } @Override public void seekExact(long ord) throws IOException { // TODO Auto-generated method stub } @Override public SeekStatus seekCeil(BytesRef text) throws IOException { // TODO Auto-generated method stub return null; } @Override public PostingsEnum postings(PostingsEnum reuse, int flags) throws IOException { // TODO Auto-generated method stub return null; } @Override public long ord() throws IOException { // TODO Auto-generated method stub return 0; } @Override public int docFreq() throws IOException { // TODO Auto-generated method stub return 0; } }; } @Override public boolean hasPositions() { // TODO Auto-generated method stub return false; } @Override public boolean hasPayloads() { // TODO Auto-generated method stub return false; } @Override public boolean hasOffsets() { // TODO Auto-generated method stub return false; } @Override public boolean hasFreqs() { // TODO Auto-generated method stub return false; } @Override public long getSumTotalTermFreq() throws IOException { // TODO Auto-generated method stub return 0; } @Override public long getSumDocFreq() throws IOException { // TODO Auto-generated method stub return 0; } @Override public int getDocCount() throws IOException { // TODO Auto-generated method stub return 0; } }; } @Override public int size() { return 0; } }; } @Override public NumericDocValues getNumericDocValues(final String field) throws IOException { return null; } @Override public BinaryDocValues getBinaryDocValues(final String field) throws IOException { return null; } @Override public SortedDocValues getSortedDocValues(final String field) throws IOException { return null; } @Override public SortedNumericDocValues getSortedNumericDocValues(final String field) throws IOException { return null; } @Override public SortedSetDocValues getSortedSetDocValues(final String field) throws IOException { return null; } @Override public Bits getDocsWithField(final String field) throws IOException { return null; } @Override public NumericDocValues getNormValues(final String field) throws IOException { return null; } @Override public FieldInfos getFieldInfos() { return new FieldInfos(new FieldInfo[0]); } final Bits liveDocs = new Bits.MatchNoBits(0); @Override public Bits getLiveDocs() { return liveDocs; } @Override public void checkIntegrity() throws IOException { } @Override public Fields getTermVectors(final int docID) throws IOException { return null; } @Override public int numDocs() { return 0; } @Override public int maxDoc() { return 0; } @Override public void document(final int docID, final StoredFieldVisitor visitor) throws IOException { } @Override protected void doClose() throws IOException { } @Override public boolean hasDeletions() { return false; } @Override public Object getCoreCacheKey() { return new Object(); } @Override public Object getCombinedCoreAndDeletesKey() { return new Object(); } }