Class: PLSQL::JDBCConnection

Inherits:
Connection show all
Defined in:
lib/plsql/jdbc_connection.rb

Overview

:nodoc:

Defined Under Namespace

Classes: CallableStatement, Cursor

Constant Summary collapse

RUBY_CLASS_TO_SQL_TYPE = 
{
  Fixnum => java.sql.Types::INTEGER,
  Bignum => java.sql.Types::INTEGER,
  Integer => java.sql.Types::INTEGER,
  Float => java.sql.Types::FLOAT,
  BigDecimal => java.sql.Types::NUMERIC,
  String => java.sql.Types::VARCHAR,
  Java::OracleSql::CLOB => Java::oracle.jdbc.OracleTypes::CLOB,
  Java::OracleSql::BLOB => Java::oracle.jdbc.OracleTypes::BLOB,
  Date => java.sql.Types::DATE,
  Time => java.sql.Types::TIMESTAMP,
  DateTime => java.sql.Types::DATE,
  Java::OracleSql::ARRAY => Java::oracle.jdbc.OracleTypes::ARRAY,
  Array => Java::oracle.jdbc.OracleTypes::ARRAY,
  Java::OracleSql::STRUCT => Java::oracle.jdbc.OracleTypes::STRUCT,
  Hash => Java::oracle.jdbc.OracleTypes::STRUCT,
  java.sql.ResultSet => Java::oracle.jdbc.OracleTypes::CURSOR,
}
SQL_TYPE_TO_RUBY_CLASS = 
{
  java.sql.Types::CHAR => String,
  java.sql.Types::VARCHAR => String,
  java.sql.Types::NUMERIC => BigDecimal,
  java.sql.Types::INTEGER => Fixnum,
  java.sql.Types::DATE => Time,
  java.sql.Types::TIMESTAMP => Time,
  Java::oracle.jdbc.OracleTypes::TIMESTAMPTZ => Time,
  Java::oracle.jdbc.OracleTypes::TIMESTAMPLTZ => Time,
  java.sql.Types::BLOB => String,
  java.sql.Types::CLOB => String,
  java.sql.Types::ARRAY => Java::OracleSql::ARRAY,
  java.sql.Types::STRUCT => Java::OracleSql::STRUCT,
  Java::oracle.jdbc.OracleTypes::CURSOR => java.sql.ResultSet
}

Instance Attribute Summary

Attributes inherited from Connection

#activerecord_class, #raw_driver

Instance Method Summary collapse

Methods inherited from Connection

create, #describe_synonym, #initialize, #jdbc?, #oci?, #raw_connection, #select_all, #select_first, #select_hash_all, #select_hash_first

Constructor Details

This class inherits a constructor from PLSQL::Connection

Instance Method Details

#autocommit=(value) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 53

def autocommit=(value)
  raw_connection.setAutoCommit(value)
end

#autocommit? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/plsql/jdbc_connection.rb', line 49

def autocommit?
  raw_connection.getAutoCommit
end

#commit ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 41

def commit
  raw_connection.commit
end

#cursor_from_query(sql, bindvars = [], options = {}) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 174

def cursor_from_query(sql, bindvars=[], options={})
  Cursor.new_from_query(self, sql, bindvars, options)
end

#database_version ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 482

def database_version
  @database_version ||= (md = raw_connection.getMetaData) && [md.getDatabaseMajorVersion, md.getDatabaseMinorVersion]
end

#exec(sql, *bindvars) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 61

def exec(sql, *bindvars)
  cs = prepare_call(sql, *bindvars)
  cs.execute
  true
ensure
  cs.close rescue nil
end

#get_bind_variable(stmt, i, type) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 278

def get_bind_variable(stmt, i, type)
  case type.to_s.to_sym
  when :Fixnum, :Bignum, :Integer
    stmt.getInt(i)
  when :Float
    stmt.getFloat(i)
  when :BigDecimal
    bd = stmt.getBigDecimal(i)
    bd && BigDecimal.new(bd.to_s)
  when :String
    stmt.getString(i)
  when :'Java::OracleSql::CLOB'
    stmt.getClob(i)
  when :'Java::OracleSql::BLOB'
    stmt.getBlob(i)
  when :Date, :DateTime
    stmt.getDATE(i)
  when :Time
    stmt.getTimestamp(i)
  when :'Java::OracleSql::ARRAY'
    stmt.getArray(i)
  when :'Java::OracleSql::STRUCT'
    stmt.getSTRUCT(i)
  when :'Java::JavaSql::ResultSet'
    stmt.getCursor(i)
  end
end

#get_java_sql_type(value, type) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 229

def get_java_sql_type(value, type)
  RUBY_CLASS_TO_SQL_TYPE[type || value.class] || java.sql.Types::VARCHAR
end

#get_ruby_value_from_result_set(rset, i, metadata) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 306

def get_ruby_value_from_result_set(rset, i, metadata)
  ruby_type = SQL_TYPE_TO_RUBY_CLASS[metadata[:sql_type]]
  ora_value = get_bind_variable(rset, i, ruby_type)
  result_new = ora_value_to_ruby_value(ora_value)
end

#logoff ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 34

def logoff
  raw_connection.close
  true
rescue
  false
end

#ora_value_to_ruby_value(value) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 438

def ora_value_to_ruby_value(value)
  case value
  when Float, BigDecimal
    ora_number_to_ruby_number(value)
  when Java::JavaMath::BigDecimal
    value && ora_number_to_ruby_number(BigDecimal.new(value.to_s))
  when Java::OracleSql::DATE
    if value
      d = value.dateValue
      t = value.timeValue
      Time.send(plsql.default_timezone, d.year + 1900, d.month + 1, d.date, t.hours, t.minutes, t.seconds)
    end
  when Java::JavaSql::Timestamp
    if value
      Time.send(plsql.default_timezone, value.year + 1900, value.month + 1, value.date, value.hours, value.minutes, value.seconds,
        value.nanos / 1000)
    end
  when Java::OracleSql::CLOB
    if value.isEmptyLob
      nil
    else
      value.getSubString(1, value.length)
    end
  when Java::OracleSql::BLOB
    if value.isEmptyLob
      nil
    else
      String.from_java_bytes(value.getBytes(1, value.length))
    end
  when Java::OracleSql::ARRAY
    value.getArray.map{|e| ora_value_to_ruby_value(e)}
  when Java::OracleSql::STRUCT
    descriptor = value.getDescriptor
    struct_metadata = descriptor.getMetaData
    field_names = (1..descriptor.getLength).map {|i| struct_metadata.getColumnName(i).downcase.to_sym}
    field_values = value.getAttributes.map{|e| ora_value_to_ruby_value(e)}
    ArrayHelpers::to_hash(field_names, field_values)
  when Java::java.sql.ResultSet
    Cursor.new(self, value)
  else
    value
  end
end

#parse(sql) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 170

def parse(sql)
  CallableStatement.new(self, sql)
end

#plsql_to_ruby_data_type(metadata) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 316

def plsql_to_ruby_data_type(metadata)
  data_type, data_length = metadata[:data_type], metadata[:data_length]
  case data_type
  when "VARCHAR2", "CHAR", "NVARCHAR2", "NCHAR"
    [String, data_length || 32767]
  when "CLOB", "NCLOB"
    [Java::OracleSql::CLOB, nil]
  when "BLOB"
    [Java::OracleSql::BLOB, nil]
  when "NUMBER"
    [BigDecimal, nil]
  when "PLS_INTEGER", "BINARY_INTEGER"
    [Fixnum, nil]
  when "DATE"
    [DateTime, nil]
  when "TIMESTAMP", "TIMESTAMP WITH TIME ZONE", "TIMESTAMP WITH LOCAL TIME ZONE"
    [Time, nil]
  when "TABLE", "VARRAY"
    [Java::OracleSql::ARRAY, nil]
  when "OBJECT"
    [Java::OracleSql::STRUCT, nil]
  when "REF CURSOR"
    [java.sql.ResultSet, nil]
  else
    [String, 32767]
  end
end

#prefetch_rows=(value) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 57

def prefetch_rows=(value)
  raw_connection.setDefaultRowPrefetch(value)
end

#prepare_call(sql, *bindvars) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 186

def prepare_call(sql, *bindvars)
  stmt = raw_connection.prepareCall(sql)
  bindvars.each_with_index do |bv, i|
    set_bind_variable(stmt, i+1, bv)
  end
  stmt
end

#prepare_statement(sql, *bindvars) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 178

def prepare_statement(sql, *bindvars)
  stmt = raw_connection.prepareStatement(sql)
  bindvars.each_with_index do |bv, i|
    set_bind_variable(stmt, i+1, ruby_value_to_ora_value(bv))
  end
  stmt
end

#result_set_to_ruby_data_type(column_type, column_type_name) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 312

def result_set_to_ruby_data_type(column_type, column_type_name)
  
end

#rollback ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 45

def rollback
  raw_connection.rollback
end

#ruby_value_to_ora_value(value, type = nil, metadata = {}) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 344

def ruby_value_to_ora_value(value, type=nil, metadata={})
  type ||= value.class
  case type.to_s.to_sym
  when :Fixnum, :String
    value
  when :BigDecimal
    case value
    when TrueClass
      java_bigdecimal(1)
    when FalseClass
      java_bigdecimal(0)
    else
      java_bigdecimal(value)
    end
  when :Date, :DateTime
    case value
    when DateTime
      java_date(Time.send(plsql.default_timezone, value.year, value.month, value.day, value.hour, value.min, value.sec))
    when Date
      java_date(Time.send(plsql.default_timezone, value.year, value.month, value.day, 0, 0, 0))
    else
      java_date(value)
    end
  when :Time
    java_timestamp(value)
  when :'Java::OracleSql::CLOB'
    if value
      clob = Java::OracleSql::CLOB.createTemporary(raw_connection, false, Java::OracleSql::CLOB::DURATION_SESSION)
      clob.setString(1, value)
      clob
    else
      Java::OracleSql::CLOB.getEmptyCLOB
    end
  when :'Java::OracleSql::BLOB'
    if value
      blob = Java::OracleSql::BLOB.createTemporary(raw_connection, false, Java::OracleSql::BLOB::DURATION_SESSION)
      blob.setBytes(1, value.to_java_bytes)
      blob
    else
      Java::OracleSql::BLOB.getEmptyBLOB
    end
  when :'Java::OracleSql::ARRAY'
    if value
      raise ArgumentError, "You should pass Array value for collection type parameter" unless value.is_a?(Array)
      descriptor = Java::OracleSql::ArrayDescriptor.createDescriptor(metadata[:sql_type_name], raw_connection)
      elem_type = descriptor.getBaseType
      elem_type_name = descriptor.getBaseName
      elem_list = value.map do |elem|
        case elem_type
        when Java::oracle.jdbc.OracleTypes::ARRAY
          ruby_value_to_ora_value(elem, Java::OracleSql::ARRAY, :sql_type_name => elem_type_name)
        when Java::oracle.jdbc.OracleTypes::STRUCT
          ruby_value_to_ora_value(elem, Java::OracleSql::STRUCT, :sql_type_name => elem_type_name)
        else
          ruby_value_to_ora_value(elem)
        end
      end
      Java::OracleSql::ARRAY.new(descriptor, raw_connection, elem_list.to_java)
    end
  when :'Java::OracleSql::STRUCT'
    if value
      raise ArgumentError, "You should pass Hash value for object type parameter" unless value.is_a?(Hash)
      descriptor = Java::OracleSql::StructDescriptor.createDescriptor(metadata[:sql_type_name], raw_connection)
      struct_metadata = descriptor.getMetaData
      struct_fields = (1..descriptor.getLength).inject({}) do |hash, i|
        hash[struct_metadata.getColumnName(i).downcase.to_sym] =
          {:type => struct_metadata.getColumnType(i), :type_name => struct_metadata.getColumnTypeName(i)}
        hash
      end
      object_attrs = java.util.HashMap.new
      value.each do |key, attr_value|
        raise ArgumentError, "Wrong object type field passed to PL/SQL procedure" unless (field = struct_fields[key])
        case field[:type]
        when Java::oracle.jdbc.OracleTypes::ARRAY
          # nested collection
          object_attrs.put(key.to_s.upcase, ruby_value_to_ora_value(attr_value, Java::OracleSql::ARRAY, :sql_type_name => field[:type_name]))
        when Java::oracle.jdbc.OracleTypes::STRUCT
          # nested object type
          object_attrs.put(key.to_s.upcase, ruby_value_to_ora_value(attr_value, Java::OracleSql::STRUCT, :sql_type_name => field[:type_name]))
        else
          object_attrs.put(key.to_s.upcase, ruby_value_to_ora_value(attr_value))
        end
      end
      Java::OracleSql::STRUCT.new(descriptor, raw_connection, object_attrs)
    end
  when :'Java::JavaSql::ResultSet'
    if value
      value.result_set
    end
  else
    value
  end
end

#set_bind_variable(stmt, i, value, type = nil, length = nil, metadata = {}) ⇒ Object 



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# File 'lib/plsql/jdbc_connection.rb', line 233

def set_bind_variable(stmt, i, value, type=nil, length=nil, metadata={})
  key = i.kind_of?(Integer) ? nil : i.to_s.gsub(':','')
  type_symbol = (!value.nil? && type ? type : value.class).to_s.to_sym
  case type_symbol
  when :Fixnum, :Bignum, :Integer
    stmt.send("setInt#{key && "AtName"}", key || i, value)
  when :Float
    stmt.send("setFloat#{key && "AtName"}", key || i, value)
  when :BigDecimal, :'Java::JavaMath::BigDecimal'
    stmt.send("setBigDecimal#{key && "AtName"}", key || i, value)
  when :String
    stmt.send("setString#{key && "AtName"}", key || i, value)
  when :'Java::OracleSql::CLOB'
    stmt.send("setClob#{key && "AtName"}", key || i, value)
  when :'Java::OracleSql::BLOB'
    stmt.send("setBlob#{key && "AtName"}", key || i, value)
  when :Date, :DateTime, :'Java::OracleSql::DATE'
    stmt.send("setDATE#{key && "AtName"}", key || i, value)
  when :Time, :'Java::JavaSql::Timestamp'
    stmt.send("setTimestamp#{key && "AtName"}", key || i, value)
  when :NilClass
    if ['TABLE', 'VARRAY', 'OBJECT'].include?(metadata[:data_type])
      stmt.send("setNull#{key && "AtName"}", key || i, get_java_sql_type(value, type),
        metadata[:sql_type_name])
    elsif metadata[:data_type] == 'REF CURSOR'
      # TODO: cannot bind NULL value to cursor parameter, getting error
      # java.sql.SQLException: Unsupported feature: sqlType=-10
      # Currently do nothing and assume that NULL values will not be passed to IN parameters
      # If cursor is IN/OUT or OUT parameter then it should work
    else
      stmt.send("setNull#{key && "AtName"}", key || i, get_java_sql_type(value, type))
    end
  when :'Java::OracleSql::ARRAY'
    stmt.send("setARRAY#{key && "AtName"}", key || i, value)
  when :'Java::OracleSql::STRUCT'
    stmt.send("setSTRUCT#{key && "AtName"}", key || i, value)
  when :'Java::JavaSql::ResultSet'
    # TODO: cannot find how to pass cursor parameter from JDBC
    # setCursor is giving exception java.sql.SQLException: Unsupported feature
    stmt.send("setCursor#{key && "AtName"}", key || i, value)
  else
    raise ArgumentError, "Don't know how to bind variable with type #{type_symbol}"
  end
end