prod/net/jaekl/cfb/db/Column.java

   1 package net.jaekl.cfb.db;
   2
   3 import net.jaekl.cfb.util.Util;
   4
   5 // Copyright (C) 2015 Christian Jaekl
   6
   7 public class Column {
   8         public enum Type {
   9                 CHAR, INTEGER, TIMESTAMPTZ, VARCHAR
  10         };
  11         public enum Null {
  12                 NOT_NULL, NULL
  13         }
  14
  15         String m_name;
  16         Type m_type;
  17         int m_width;
  18         Null m_null;
  19
  20         public Column(String name, Type type, int width, Null canBeNull)
  21         {
  22                 m_name = name;
  23                 m_type = type;
  24                 m_width = width;
  25                 m_null = canBeNull;
  26         }
  27
  28         public String getName() { return m_name; }
  29         public Type getType() { return m_type; }
  30         public int getWidth() { return m_width; }
  31         public Null getNull() { return m_null; }
  32
  33         // Create a column based on an array of Objects
  34         // Input format:  { name, type, width, can_be_null }
  35         public static Column construct(Object[] spec) {
  36                 assert(null != spec);
  37                 assert(4 == spec.length);
  38                 assert(spec[0] instanceof String);
  39                 assert(spec[1] instanceof Type);
  40                 assert(spec[2] instanceof Number);
  41                 assert(spec[3] instanceof Null);
  42
  43                 String name = (String)(spec[0]);
  44                 Type type = (Type)(spec[1]);
  45                 Number width = (Number)(spec[2]);
  46                 Null canBeNull = (Null)(spec[3]);
  47
  48                 return new Column(name, type, width.intValue(), canBeNull);
  49         }
  50
  51         @Override
  52         public boolean equals(Object obj)
  53         {
  54                 if (null == obj) {
  55                         return false;
  56                 }
  57                 if (! (obj instanceof Column)) {
  58                         return false;
  59                 }
  60                 Column other = (Column)obj;
  61
  62                 if (! Util.objsAreEqual(this.getName(), other.getName())) {
  63                         return false;
  64                 }
  65                 if (! Util.objsAreEqual(this.getType(), other.getType())) {
  66                         return false;
  67                 }
  68                 if (this.getWidth() != other.getWidth()) {
  69                         return false;
  70                 }
  71                 if (! Util.objsAreEqual(this.getNull(), other.getNull())) {
  72                         return false;
  73                 }
  74
  75                 return true;
  76         }
  77
  78         @Override
  79         public int hashCode() {
  80                 int code = Util.objHashCode(getName())
  81                                  ^ Util.objHashCode(getType())
  82                                  ^ getWidth()
  83                                  ^ Util.objHashCode(getNull());
  84                 return code;
  85         }
  86 }