/* * Licensed to CRATE Technology GmbH ("Crate") under one or more contributor * license agreements. See the NOTICE file distributed with this work for * additional information regarding copyright ownership. Crate 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. * * However, if you have executed another commercial license agreement * with Crate these terms will supersede the license and you may use the * software solely pursuant to the terms of the relevant commercial agreement. */ package io.crate.expression.reference.doc.lucene; import io.crate.exceptions.GroupByOnArrayUnsupportedException; import org.apache.lucene.index.DocValues; import org.apache.lucene.index.LeafReaderContext; import org.apache.lucene.index.SortedSetDocValues; import org.apache.lucene.util.BytesRef; import org.elasticsearch.search.DocValueFormat; import java.io.IOException; import java.io.UncheckedIOException; public class IpColumnReference extends LuceneCollectorExpression<String> { private final String columnName; private SortedSetDocValues values; private int docId; public IpColumnReference(String columnName) { this.columnName = columnName; } @Override public String value() { try { if (values.advanceExact(docId)) { long ord = values.nextOrd(); if (values.nextOrd() != SortedSetDocValues.NO_MORE_ORDS) { throw new GroupByOnArrayUnsupportedException(columnName); } BytesRef encoded = values.lookupOrd(ord); return (String) DocValueFormat.IP.format(encoded); } else { return null; } } catch (IOException e) { throw new UncheckedIOException(e); } } @Override public void setNextDocId(int docId) { this.docId = docId; } @Override public void setNextReader(LeafReaderContext context) throws IOException { values = context.reader().getSortedSetDocValues(columnName); if (values == null) { values = DocValues.emptySortedSet(); } } }