content: /*
   * Copyright (c) 2013. wyouflf (wyouflf@gmail.com)
   *
   * 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.lidroid.xutils.db.table;
  
  import android.text.TextUtils;
  import com.lidroid.xutils.db.annotation.Id;
  import com.lidroid.xutils.db.annotation.Table;
  import com.lidroid.xutils.db.converter.ColumnConverterFactory;
  import com.lidroid.xutils.util.LogUtils;
  
  import java.lang.reflect.Field;
  import java.lang.reflect.Modifier;
  import java.util.HashMap;
  import java.util.concurrent.ConcurrentHashMap;
  
  public class TableUtils {
  
      private TableUtils() {
      }
  
      public static String getTableName(Class<?> entityType) {
          Table table = entityType.getAnnotation(Table.class);
          if (table == null || TextUtils.isEmpty(table.name())) {
              return entityType.getName().replace('.', '_');
          }
          return table.name();
      }
  
      public static String getExecAfterTableCreated(Class<?> entityType) {
          Table table = entityType.getAnnotation(Table.class);
          if (table != null) {
              return table.execAfterTableCreated();
          }
          return null;
      }
  
      /**
       * key: entityType.name
       */
      private static ConcurrentHashMap<String, HashMap<String, Column>> entityColumnsMap = new ConcurrentHashMap<String, HashMap<String, Column>>();
  
      /* package */
      static synchronized HashMap<String, Column> getColumnMap(Class<?> entityType) {
  
          if (entityColumnsMap.containsKey(entityType.getName())) {
              return entityColumnsMap.get(entityType.getName());
          }
  
          HashMap<String, Column> columnMap = new HashMap<String, Column>();
          String primaryKeyFieldName = getPrimaryKeyFieldName(entityType);
          addColumns2Map(entityType, primaryKeyFieldName, columnMap);
          entityColumnsMap.put(entityType.getName(), columnMap);
  
          return columnMap;
      }
  
      private static void addColumns2Map(Class<?> entityType, String primaryKeyFieldName, HashMap<String, Column> columnMap) {
          if (Object.class.equals(entityType)) return;
          try {
              Field[] fields = entityType.getDeclaredFields();
              for (Field field : fields) {
                  if (ColumnUtils.isTransient(field) || Modifier.isStatic(field.getModifiers())) {
                      continue;
                  }
                  if (ColumnConverterFactory.isSupportColumnConverter(field.getType())) {
                      if (!field.getName().equals(primaryKeyFieldName)) {
                          Column column = new Column(entityType, field);
                          if (!columnMap.containsKey(column.getColumnName())) {
                              columnMap.put(column.getColumnName(), column);
                          }
                      }
                  } else if (ColumnUtils.isForeign(field)) {
                      Foreign column = new Foreign(entityType, field);
                      if (!columnMap.containsKey(column.getColumnName())) {
                          columnMap.put(column.getColumnName(), column);
                      }
                  } else if (ColumnUtils.isFinder(field)) {
                      Finder column = new Finder(entityType, field);
                      if (!columnMap.containsKey(column.getColumnName())) {
                          columnMap.put(column.getColumnName(), column);
                      }
                  }
              }
  
              if (!Object.class.equals(entityType.getSuperclass())) {
                  addColumns2Map(entityType.getSuperclass(), primaryKeyFieldName, columnMap);
              }
          } catch (Throwable e) {
              LogUtils.e(e.getMessage(), e);
          }
      }
  
      /* package */
      static Column getColumnOrId(Class<?> entityType, String columnName) {
          if (getPrimaryKeyColumnName(entityType).equals(columnName)) {
              return getId(entityType);
          }
          return getColumnMap(entityType).get(columnName);
      }
  
      /**
       * key: entityType.name
       */
      private static ConcurrentHashMap<String, com.lidroid.xutils.db.table.Id> entityIdMap = new ConcurrentHashMap<String, com.lidroid.xutils.db.table.Id>();
  
      /* package */
      static synchronized com.lidroid.xutils.db.table.Id getId(Class<?> entityType) {
          if (Object.class.equals(entityType)) {
              throw new RuntimeException("field 'id' not found");
          }
  
          if (entityIdMap.containsKey(entityType.getName())) {
              return entityIdMap.get(entityType.getName());
          }
  
          Field primaryKeyField = null;
          Field[] fields = entityType.getDeclaredFields();
          if (fields != null) {
  
              for (Field field : fields) {
                  if (field.getAnnotation(Id.class) != null) {
                      primaryKeyField = field;
                      break;
                  }
              }
  
              if (primaryKeyField == null) {
                  for (Field field : fields) {
                      if ("id".equals(field.getName()) || "_id".equals(field.getName())) {
                          primaryKeyField = field;
                          break;
                      }
                  }
              }
          }
  
          if (primaryKeyField == null) {
              return getId(entityType.getSuperclass());
          }
  
          com.lidroid.xutils.db.table.Id id = new com.lidroid.xutils.db.table.Id(entityType, primaryKeyField);
          entityIdMap.put(entityType.getName(), id);
          return id;
      }
  
      private static String getPrimaryKeyFieldName(Class<?> entityType) {
          com.lidroid.xutils.db.table.Id id = getId(entityType);
          return id == null ? null : id.getColumnField().getName();
      }
  
      private static String getPrimaryKeyColumnName(Class<?> entityType) {
          com.lidroid.xutils.db.table.Id id = getId(entityType);
          return id == null ? null : id.getColumnName();
      }
  }
  