| /** |
| * 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.atlas.type; |
| |
| |
| import org.apache.atlas.exception.AtlasBaseException; |
| import org.apache.atlas.model.TypeCategory; |
| import org.apache.atlas.model.typedef.AtlasBaseTypeDef; |
| import org.codehaus.jackson.map.DeserializationConfig; |
| import org.codehaus.jackson.map.ObjectMapper; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| |
| |
| /** |
| * base class that declares interface for all Atlas types. |
| */ |
| |
| public abstract class AtlasType { |
| |
| private static final ObjectMapper mapper = new ObjectMapper() |
| .configure(DeserializationConfig.Feature.USE_BIG_DECIMAL_FOR_FLOATS, true); |
| |
| private final String typeName; |
| private final TypeCategory typeCategory; |
| |
| protected AtlasType(AtlasBaseTypeDef typeDef) { |
| this(typeDef.getName(), typeDef.getCategory()); |
| } |
| |
| protected AtlasType(String typeName, TypeCategory typeCategory) { |
| this.typeName = typeName; |
| this.typeCategory = typeCategory; |
| } |
| |
| void resolveReferences(AtlasTypeRegistry typeRegistry) throws AtlasBaseException { |
| } |
| |
| void resolveReferencesPhase2(AtlasTypeRegistry typeRegistry) throws AtlasBaseException { |
| } |
| |
| void resolveReferencesPhase3(AtlasTypeRegistry typeRegistry) throws AtlasBaseException { |
| } |
| |
| public String getTypeName() { return typeName; } |
| |
| public TypeCategory getTypeCategory() { return typeCategory; } |
| |
| public abstract Object createDefaultValue(); |
| |
| public Object createOptionalDefaultValue() { |
| return createDefaultValue(); |
| } |
| |
| public abstract boolean isValidValue(Object obj); |
| |
| public boolean areEqualValues(Object val1, Object val2, Map<String, String> guidAssignments) { |
| final boolean ret; |
| |
| if (val1 == null) { |
| ret = val2 == null; |
| } else if (val2 == null) { |
| ret = false; |
| } else { |
| Object normalizedVal1 = getNormalizedValue(val1); |
| |
| if (normalizedVal1 == null) { |
| ret = false; |
| } else { |
| Object normalizedVal2 = getNormalizedValue(val2); |
| |
| if (normalizedVal2 == null) { |
| ret = false; |
| } else { |
| ret = Objects.equals(normalizedVal1, normalizedVal2); |
| } |
| } |
| } |
| |
| return ret; |
| } |
| |
| public abstract Object getNormalizedValue(Object obj); |
| |
| public boolean validateValue(Object obj, String objName, List<String> messages) { |
| boolean ret = isValidValue(obj); |
| |
| if (!ret) { |
| messages.add(objName + "=" + obj + ": invalid value for type " + getTypeName()); |
| } |
| |
| return ret; |
| } |
| |
| public boolean isValidValueForUpdate(Object obj) { return isValidValue(obj); } |
| |
| public Object getNormalizedValueForUpdate(Object obj) { return getNormalizedValue(obj); } |
| |
| public boolean validateValueForUpdate(Object obj, String objName, List<String> messages) { |
| return validateValue(obj, objName, messages); |
| } |
| |
| /* for attribute of entity-type, the value would be of AtlasObjectId |
| * when an attribute instance is created i.e. AtlasAttribute, this method |
| * will be called to get AtlasEntityType replaced with AtlasObjectType |
| */ |
| public AtlasType getTypeForAttribute() { |
| return this; |
| } |
| |
| public static String toJson(Object obj) { |
| String ret; |
| try { |
| ret = mapper.writeValueAsString(obj); |
| }catch (IOException e){ |
| ret = null; |
| } |
| return ret; |
| } |
| |
| public static <T> T fromJson(String jsonStr, Class<T> type) { |
| T ret; |
| try { |
| ret = mapper.readValue(jsonStr, type); |
| }catch (IOException e){ |
| ret = null; |
| } |
| return ret; |
| } |
| } |