com.netflix.hollow.jsonadapter.discover.HollowSchemaNamer Maven / Gradle / Ivy
/*
*
* Copyright 2016 Netflix, Inc.
*
* Licensed 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 com.netflix.hollow.jsonadapter.discover;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public class HollowSchemaNamer {
private final ConcurrentHashMap> listNames = new ConcurrentHashMap>();
private final ConcurrentHashMap> subObjectNames = new ConcurrentHashMap>();
public String subObjectName(String typeName, String prefix, String fieldName) {
return subTypeName(subObjectNames, typeName, prefix, fieldName);
}
public String subCollectionName(String typeName, String prefix, String fieldName) {
return subTypeName(listNames, typeName, prefix, fieldName);
}
public String subTypeName(ConcurrentHashMap> subNamesMap, String typeName, String prefix, String fieldName) {
Map typeNamesMap = subNamesMap.get(typeName);
if(typeNamesMap == null) {
synchronized (subNamesMap) {
typeNamesMap = subNamesMap.get(typeName);
if (typeNamesMap == null) {
typeNamesMap = new ConcurrentHashMap();
Map existingMap = subNamesMap.putIfAbsent(typeName, typeNamesMap);
if(existingMap != null)
typeNamesMap = existingMap;
}
}
}
String name = typeNamesMap.get(fieldName);
if(name == null) {
synchronized (typeNamesMap) {
name = typeNamesMap.get(fieldName);
if (name == null) {
name = typeName + prefix + uppercaseFirstCharacter(fieldName);
name = name.intern();
typeNamesMap.put(fieldName, name);
}
}
}
return name;
}
public String schemaNameFromPropertyPath(String propertyPath) {
StringBuilder schemaName = new StringBuilder();
while(propertyPath.indexOf('.') != -1) {
String nextToken = propertyPath.substring(0, propertyPath.indexOf('.'));
schemaName.append(uppercaseFirstCharacter(nextToken));
propertyPath = propertyPath.substring(propertyPath.indexOf('.') + 1);
}
schemaName.append(uppercaseFirstCharacter(propertyPath));
return schemaName.toString();
}
private String uppercaseFirstCharacter(String value) {
if (value == null) return "";
return value.substring(0, 1).toUpperCase() + value.substring(1);
}
}