| /** |
| * 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.hadoop.hive.serde2.typeinfo; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.apache.hadoop.hive.serde.Constants; |
| import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorUtils; |
| |
| /** |
| * TypeInfoFactory can be used to create the TypeInfo object for any types. |
| * TypeInfo objects are all read-only so we can reuse them easily. |
| * TypeInfoFactory has internal cache to make sure we don't create 2 TypeInfo |
| * objects that represents the same type. |
| */ |
| public final class TypeInfoFactory { |
| |
| static ConcurrentHashMap<String, TypeInfo> cachedPrimitiveTypeInfo = new ConcurrentHashMap<String, TypeInfo>(); |
| |
| private TypeInfoFactory() { |
| // prevent instantiation |
| } |
| |
| public static TypeInfo getPrimitiveTypeInfo(String typeName) { |
| if (null == PrimitiveObjectInspectorUtils.getTypeEntryFromTypeName(typeName)) { |
| throw new RuntimeException("Cannot getPrimitiveTypeInfo for " + typeName); |
| } |
| TypeInfo result = cachedPrimitiveTypeInfo.get(typeName); |
| if (result == null) { |
| result = new PrimitiveTypeInfo(typeName); |
| cachedPrimitiveTypeInfo.put(typeName, result); |
| } |
| return result; |
| } |
| |
| public static final TypeInfo voidTypeInfo = getPrimitiveTypeInfo(Constants.VOID_TYPE_NAME); |
| public static final TypeInfo booleanTypeInfo = getPrimitiveTypeInfo(Constants.BOOLEAN_TYPE_NAME); |
| public static final TypeInfo intTypeInfo = getPrimitiveTypeInfo(Constants.INT_TYPE_NAME); |
| public static final TypeInfo longTypeInfo = getPrimitiveTypeInfo(Constants.BIGINT_TYPE_NAME); |
| public static final TypeInfo stringTypeInfo = getPrimitiveTypeInfo(Constants.STRING_TYPE_NAME); |
| public static final TypeInfo floatTypeInfo = getPrimitiveTypeInfo(Constants.FLOAT_TYPE_NAME); |
| public static final TypeInfo doubleTypeInfo = getPrimitiveTypeInfo(Constants.DOUBLE_TYPE_NAME); |
| public static final TypeInfo byteTypeInfo = getPrimitiveTypeInfo(Constants.TINYINT_TYPE_NAME); |
| public static final TypeInfo shortTypeInfo = getPrimitiveTypeInfo(Constants.SMALLINT_TYPE_NAME); |
| |
| public static final TypeInfo unknownTypeInfo = getPrimitiveTypeInfo("unknown"); |
| |
| public static TypeInfo getPrimitiveTypeInfoFromPrimitiveWritable(Class<?> clazz) { |
| String typeName = PrimitiveObjectInspectorUtils.getTypeNameFromPrimitiveWritable(clazz); |
| if (typeName == null) { |
| throw new RuntimeException("Internal error: Cannot get typeName for " + clazz); |
| } |
| return getPrimitiveTypeInfo(typeName); |
| } |
| |
| public static TypeInfo getPrimitiveTypeInfoFromJavaPrimitive(Class<?> clazz) { |
| return getPrimitiveTypeInfo(PrimitiveObjectInspectorUtils.getTypeNameFromPrimitiveJava(clazz)); |
| } |
| |
| static ConcurrentHashMap<ArrayList<List<?>>, TypeInfo> cachedStructTypeInfo = new ConcurrentHashMap<ArrayList<List<?>>, TypeInfo>(); |
| |
| public static TypeInfo getStructTypeInfo(List<String> names, List<TypeInfo> typeInfos) { |
| ArrayList<List<?>> signature = new ArrayList<List<?>>(2); |
| signature.add(names); |
| signature.add(typeInfos); |
| TypeInfo result = cachedStructTypeInfo.get(signature); |
| if (result == null) { |
| result = new StructTypeInfo(names, typeInfos); |
| cachedStructTypeInfo.put(signature, result); |
| } |
| return result; |
| } |
| |
| static ConcurrentHashMap<List<?>, TypeInfo> cachedUnionTypeInfo = new ConcurrentHashMap<List<?>, TypeInfo>(); |
| |
| public static TypeInfo getUnionTypeInfo(List<TypeInfo> typeInfos) { |
| TypeInfo result = cachedUnionTypeInfo.get(typeInfos); |
| if (result == null) { |
| result = new UnionTypeInfo(typeInfos); |
| cachedUnionTypeInfo.put(typeInfos, result); |
| } |
| return result; |
| } |
| |
| static ConcurrentHashMap<TypeInfo, TypeInfo> cachedListTypeInfo = new ConcurrentHashMap<TypeInfo, TypeInfo>(); |
| |
| public static TypeInfo getListTypeInfo(TypeInfo elementTypeInfo) { |
| TypeInfo result = cachedListTypeInfo.get(elementTypeInfo); |
| if (result == null) { |
| result = new ListTypeInfo(elementTypeInfo); |
| cachedListTypeInfo.put(elementTypeInfo, result); |
| } |
| return result; |
| } |
| |
| static ConcurrentHashMap<ArrayList<TypeInfo>, TypeInfo> cachedMapTypeInfo = new ConcurrentHashMap<ArrayList<TypeInfo>, TypeInfo>(); |
| |
| public static TypeInfo getMapTypeInfo(TypeInfo keyTypeInfo, TypeInfo valueTypeInfo) { |
| ArrayList<TypeInfo> signature = new ArrayList<TypeInfo>(2); |
| signature.add(keyTypeInfo); |
| signature.add(valueTypeInfo); |
| TypeInfo result = cachedMapTypeInfo.get(signature); |
| if (result == null) { |
| result = new MapTypeInfo(keyTypeInfo, valueTypeInfo); |
| cachedMapTypeInfo.put(signature, result); |
| } |
| return result; |
| }; |
| |
| } |