| /* |
| * 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.geode.cache.lucene.internal.repository.serializer; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.apache.lucene.document.Document; |
| import org.apache.lucene.document.DoublePoint; |
| import org.apache.lucene.document.Field.Store; |
| import org.apache.lucene.document.FloatPoint; |
| import org.apache.lucene.document.IntPoint; |
| import org.apache.lucene.document.LongPoint; |
| import org.apache.lucene.document.StringField; |
| import org.apache.lucene.document.TextField; |
| import org.apache.lucene.index.IndexableField; |
| import org.apache.lucene.index.Term; |
| import org.apache.lucene.util.BytesRef; |
| |
| import org.apache.geode.DataSerializer; |
| import org.apache.geode.InternalGemFireError; |
| import org.apache.geode.internal.util.BlobHelper; |
| |
| /** |
| * Static utility functions for mapping objects to lucene documents |
| */ |
| public class SerializerUtil { |
| private static final String KEY_FIELD = "_KEY"; |
| |
| private static final Set<Class> SUPPORTED_PRIMITIVE_TYPES; |
| |
| static { |
| HashSet<Class> primitiveTypes = new HashSet<>(); |
| primitiveTypes.add(String.class); |
| primitiveTypes.add(long.class); |
| primitiveTypes.add(int.class); |
| primitiveTypes.add(float.class); |
| primitiveTypes.add(double.class); |
| primitiveTypes.add(Long.class); |
| primitiveTypes.add(Integer.class); |
| primitiveTypes.add(Float.class); |
| primitiveTypes.add(Double.class); |
| |
| SUPPORTED_PRIMITIVE_TYPES = Collections.unmodifiableSet(primitiveTypes); |
| } |
| |
| /** |
| * A small buffer for converting keys to byte[] arrays. |
| */ |
| private static ThreadLocal<ByteArrayOutputStream> LOCAL_BUFFER = |
| new ThreadLocal<ByteArrayOutputStream>() { |
| @Override |
| protected ByteArrayOutputStream initialValue() { |
| return new ByteArrayOutputStream(); |
| } |
| }; |
| |
| private SerializerUtil() {} |
| |
| /** |
| * Add a Apache Geode key to a document |
| */ |
| public static void addKey(Object key, Document doc) { |
| if (key instanceof String) { |
| doc.add(new StringField(KEY_FIELD, (String) key, Store.YES)); |
| } else { |
| doc.add(new StringField(KEY_FIELD, keyToBytes(key), Store.YES)); |
| } |
| } |
| |
| /** |
| * Add a field to the document. |
| * |
| * @return true if the field was successfully added |
| */ |
| public static boolean addField(Document doc, String field, Object fieldValue) { |
| Class<?> clazz = fieldValue.getClass(); |
| if (clazz == String.class) { |
| doc.add(new TextField(field, (String) fieldValue, Store.NO)); |
| } else if (clazz == Long.class) { |
| doc.add(new LongPoint(field, (Long) fieldValue)); |
| } else if (clazz == Integer.class) { |
| doc.add(new IntPoint(field, (Integer) fieldValue)); |
| } else if (clazz == Float.class) { |
| doc.add(new FloatPoint(field, (Float) fieldValue)); |
| } else if (clazz == Double.class) { |
| doc.add(new DoublePoint(field, (Double) fieldValue)); |
| } else { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Return true if a field type can be written to a lucene document. |
| */ |
| public static boolean isSupported(Class<?> type) { |
| return SUPPORTED_PRIMITIVE_TYPES.contains(type); |
| } |
| |
| public static Collection<Class> supportedPrimitiveTypes() { |
| return SUPPORTED_PRIMITIVE_TYPES; |
| } |
| |
| /** |
| * Extract the Apache Geode key from a lucene document |
| */ |
| public static Object getKey(Document doc) { |
| IndexableField field = doc.getField(KEY_FIELD); |
| if (field.stringValue() != null) { |
| return field.stringValue(); |
| } else { |
| return keyFromBytes(field.binaryValue()); |
| } |
| } |
| |
| /** |
| * Extract the Apache Geode key term from a lucene document |
| */ |
| public static Term getKeyTerm(Document doc) { |
| IndexableField field = doc.getField(KEY_FIELD); |
| if (field.stringValue() != null) { |
| return new Term(KEY_FIELD, field.stringValue()); |
| } else { |
| return new Term(KEY_FIELD, field.binaryValue()); |
| } |
| } |
| |
| /** |
| * Convert a Apache Geode key into a key search term that can be used to update or delete the |
| * document associated with this key. |
| */ |
| public static Term toKeyTerm(Object key) { |
| if (key instanceof String) { |
| return new Term(KEY_FIELD, (String) key); |
| } else { |
| return new Term(KEY_FIELD, keyToBytes(key)); |
| } |
| } |
| |
| private static Object keyFromBytes(BytesRef bytes) { |
| try { |
| return BlobHelper.deserializeBlob(bytes.bytes); |
| } catch (ClassNotFoundException | IOException e) { |
| throw new InternalGemFireError(e); |
| } |
| } |
| |
| /** |
| * Convert a key to a byte array. |
| */ |
| private static BytesRef keyToBytes(Object key) { |
| ByteArrayOutputStream buffer = LOCAL_BUFFER.get(); |
| |
| try { |
| DataOutputStream out = new DataOutputStream(buffer); |
| DataSerializer.writeObject(key, out); |
| out.flush(); |
| BytesRef result = new BytesRef(buffer.toByteArray()); |
| buffer.reset(); |
| return result; |
| } catch (IOException e) { |
| throw new InternalGemFireError("Unable to serialize key", e); |
| } |
| } |
| |
| } |