| /* |
| * 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 org.apache.rya.api.query.strategy.wholerow; |
| |
| import static org.apache.rya.api.RdfCloudTripleStoreConstants.DELIM_BYTES; |
| import static org.apache.rya.api.RdfCloudTripleStoreConstants.LAST_BYTES; |
| import static org.apache.rya.api.RdfCloudTripleStoreConstants.TYPE_DELIM_BYTES; |
| |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.util.Map; |
| |
| import org.apache.rya.api.RdfCloudTripleStoreConfiguration; |
| import org.apache.rya.api.RdfCloudTripleStoreConstants.TABLE_LAYOUT; |
| import org.apache.rya.api.RdfCloudTripleStoreUtils; |
| import org.apache.rya.api.domain.RyaRange; |
| import org.apache.rya.api.domain.RyaType; |
| import org.apache.rya.api.domain.RyaIRI; |
| import org.apache.rya.api.domain.RyaIRIRange; |
| import org.apache.rya.api.query.strategy.AbstractTriplePatternStrategy; |
| import org.apache.rya.api.query.strategy.ByteRange; |
| import org.apache.rya.api.resolver.RyaContext; |
| import org.apache.rya.api.resolver.RyaTypeResolverException; |
| |
| import com.google.common.primitives.Bytes; |
| |
| /** |
| * Date: 7/14/12 |
| * Time: 7:35 AM |
| */ |
| public class SpoWholeRowTriplePatternStrategy extends AbstractTriplePatternStrategy { |
| |
| @Override |
| public TABLE_LAYOUT getLayout() { |
| return TABLE_LAYOUT.SPO; |
| } |
| |
| @Override |
| public Map.Entry<TABLE_LAYOUT, ByteRange> defineRange(final RyaIRI subject, final RyaIRI predicate, final RyaType object, |
| final RyaIRI context, final RdfCloudTripleStoreConfiguration conf) throws IOException { |
| try { |
| //spo(ng) |
| //sp(ng) |
| //s(ng) |
| //sp_r(o)(ng) |
| //s_r(p)(ng) |
| if (!handles(subject, predicate, object, context)) { |
| return null; |
| } |
| |
| final RyaContext ryaContext = RyaContext.getInstance(); |
| |
| final TABLE_LAYOUT table_layout = TABLE_LAYOUT.SPO; |
| byte[] start; |
| byte[] stop; |
| if (predicate != null) { |
| if (object != null) { |
| if (object instanceof RyaRange) { |
| //sp_r(o) |
| //range = sp_r(o.s)->sp_r(o.e) (remove last byte to remove type info) |
| RyaRange rv = (RyaRange) object; |
| rv = ryaContext.transformRange(rv); |
| final byte[] objStartBytes = ryaContext.serializeType(rv.getStart())[0]; |
| final byte[] objEndBytes = ryaContext.serializeType(rv.getStop())[0]; |
| final byte[] subjBytes = subject.getData().getBytes(StandardCharsets.UTF_8); |
| final byte[] predBytes = predicate.getData().getBytes(StandardCharsets.UTF_8); |
| start = Bytes.concat(subjBytes, DELIM_BYTES, predBytes, DELIM_BYTES, objStartBytes); |
| stop = Bytes.concat(subjBytes, DELIM_BYTES, predBytes, DELIM_BYTES, objEndBytes, DELIM_BYTES, LAST_BYTES); |
| } else { |
| //spo |
| //range = spo->spo (remove last byte to remove type info) |
| //TODO: There must be a better way than creating multiple byte[] |
| final byte[] objBytes = ryaContext.serializeType(object)[0]; |
| start = Bytes.concat(subject.getData().getBytes(StandardCharsets.UTF_8), DELIM_BYTES, predicate.getData().getBytes(StandardCharsets.UTF_8), DELIM_BYTES, objBytes, TYPE_DELIM_BYTES); |
| stop = Bytes.concat(start, LAST_BYTES); |
| } |
| } else if (predicate instanceof RyaRange) { |
| //s_r(p) |
| //range = s_r(p.s)->s_r(p.e) |
| RyaRange rv = (RyaRange) predicate; |
| rv = ryaContext.transformRange(rv); |
| final byte[] subjBytes = subject.getData().getBytes(StandardCharsets.UTF_8); |
| final byte[] predStartBytes = rv.getStart().getData().getBytes(StandardCharsets.UTF_8); |
| final byte[] predStopBytes = rv.getStop().getData().getBytes(StandardCharsets.UTF_8); |
| start = Bytes.concat(subjBytes, DELIM_BYTES, predStartBytes); |
| stop = Bytes.concat(subjBytes, DELIM_BYTES, predStopBytes, DELIM_BYTES, LAST_BYTES); |
| } else { |
| //sp |
| //range = sp |
| start = Bytes.concat(subject.getData().getBytes(StandardCharsets.UTF_8), DELIM_BYTES, predicate.getData().getBytes(StandardCharsets.UTF_8), DELIM_BYTES); |
| stop = Bytes.concat(start, LAST_BYTES); |
| } |
| } else if (subject instanceof RyaRange) { |
| //r(s) |
| //range = r(s.s) -> r(s.e) |
| RyaRange ru = (RyaRange) subject; |
| ru = ryaContext.transformRange(ru); |
| start = ru.getStart().getData().getBytes(StandardCharsets.UTF_8); |
| stop = Bytes.concat(ru.getStop().getData().getBytes(StandardCharsets.UTF_8), DELIM_BYTES, LAST_BYTES); |
| } else { |
| //s |
| //range = s |
| start = Bytes.concat(subject.getData().getBytes(StandardCharsets.UTF_8), DELIM_BYTES); |
| stop = Bytes.concat(start, LAST_BYTES); |
| } |
| return new RdfCloudTripleStoreUtils.CustomEntry<TABLE_LAYOUT, ByteRange>(table_layout, |
| new ByteRange(start, stop)); |
| } catch (final RyaTypeResolverException e) { |
| throw new IOException(e); |
| } |
| } |
| |
| @Override |
| public boolean handles(final RyaIRI subject, final RyaIRI predicate, final RyaType object, final RyaIRI context) { |
| //if subject is not null and (if predicate is null then object must be null) |
| return (subject != null && !(subject instanceof RyaIRIRange && predicate != null)) && !((predicate == null || predicate instanceof RyaIRIRange) && (object != null)); |
| } |
| } |