/*
    * 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.myfaces.orchestra.dynaForm.metadata.utils;
  
  import java.math.BigDecimal;
  import java.math.BigInteger;
  import java.util.HashMap;
  import java.util.Map;
  
  public class TypeInfos
  {
      private final static Map<Class<?>, Info> INFOS = new HashMap<Class<?>, Info>(10);
  
      public static class Info
      {
          /**
           * min possible value
           */
          private final Double minValue;
  
          /**
           * max possible value
           */
          private final Double maxValue;
  
          /**
           * display length, -1 means unknown
           */
          private final int length;
  
          /**
           * do this type has a fractional part
           */
          private final boolean hasFractional;
  
          /**
           * if this is a number
           */
          private final boolean number;
  
          private Info(boolean number, Double minValue, Double maxValue, boolean hasFractional)
          {
              if (minValue != null)
              {
                  int length = String.valueOf(minValue).length();
                  if (!hasFractional)
                  {
                      length = length - 2; // strip off the .0 part after string conversion
                  }
                  this.length = length;
              }
              else
              {
                  length = -1;
              }
              this.minValue = minValue;
              this.maxValue = maxValue;
              this.hasFractional = hasFractional;
              this.number = number;
          }
  
          public int getLength()
          {
              return length;
          }
  
          public Double getMaxValue()
          {
              return maxValue;
          }
  
          public Double getMinValue()
          {
              return minValue;
          }
  
          public boolean isHasFractional()
          {
              return hasFractional;
          }
  
          public boolean isNumber()
          {
             return number;
         }
     }
 
     static
     {
         addInfo(new Info(true, (double) Byte.MIN_VALUE, (double) Byte.MAX_VALUE, false),
                 Byte.class, Byte.TYPE);
         addInfo(new Info(true, (double) Short.MIN_VALUE, (double) Short.MAX_VALUE, false),
                 Short.class, Short.TYPE);
         addInfo(new Info(true, (double) Integer.MIN_VALUE, (double) Integer.MAX_VALUE, false),
                 Integer.class, Integer.TYPE);
         addInfo(new Info(true, (double) Long.MIN_VALUE, (double) Long.MAX_VALUE, false),
                 Long.class, Long.TYPE);
         addInfo(new Info(true, null, null, false), BigInteger.class);
         addInfo(new Info(true, null, (double) Float.MAX_VALUE, true), Float.class, Float.TYPE);
         addInfo(new Info(true, null, Double.MAX_VALUE, true), Double.class, Double.TYPE);
         addInfo(new Info(true, null, null, true), BigDecimal.class);
         addInfo(new Info(false, null, null, false), String.class);
     }
 
     private TypeInfos()
     {
     }
 
     private static void addInfo(Info info, Class<?>... types)
     {
         for (Class<?> type : types)
         {
             INFOS.put(type, info);
         }
     }
 
     public static Info getInfo(Class<?> type)
     {
         return INFOS.get(type);
     }
 }