Examples of com.j256.ormlite.field.FieldConverter

com.j256.ormlite.stmt.query.Clause
Convert a Java object into the appropriate argument to a SQL statement and then back from the result set to the Java object. This allows databases to configure per-type conversion. This is used by the {@link BaseDatabaseType#getFieldConverter(DataPersister)} method to find the converter for a particular databasetype. Databases can then override the default data conversion mechanisms as necessary. @author graywatson


  /**
   * Add "ORDER BY" clause to the SQL query statement.
   */
  public QueryBuilder<T, ID> orderBy(String columnName, boolean ascending) {
    FieldType fieldType = verifyColumnName(columnName);
    if (fieldType.isForeignCollection()) {
      throw new IllegalArgumentException("Can't orderBy foreign colletion field: " + columnName);
    }
    if (orderByList == null) {
      orderByList = new ArrayList<OrderBy>();
    }

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    }
    appendOffset(sb);
  }


  private void addSelectColumnToList(String columnName) {
    FieldType fieldType = verifyColumnName(columnName);
    if (fieldType.isForeignCollection()) {
      throw new IllegalArgumentException("Can't select from foreign colletion field: " + columnName);
    }
    selectColumnList.add(columnName);
  }

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  private static <T> FieldType[] extractFieldTypes(ConnectionSource connectionSource, Class<T> clazz, String tableName)
      throws SQLException {
    List<FieldType> fieldTypes = new ArrayList<FieldType>();
    for (Class<?> classWalk = clazz; classWalk != null; classWalk = classWalk.getSuperclass()) {
      for (Field field : classWalk.getDeclaredFields()) {
        FieldType fieldType = FieldType.createFieldType(connectionSource, tableName, field, clazz);
        if (fieldType != null) {
          fieldTypes.add(fieldType);
        }
      }
    }

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      if (first) {
        first = false;
      } else {
        sb.append(',');
      }
      FieldType fieldType = tableInfo.getFieldTypeByColumnName(columnName);
      appendFieldColumnName(sb, fieldType, fieldTypeList);
      if (fieldType == idField) {
        hasId = true;
      }
    }

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  private FieldType[] convertFieldConfigs(ConnectionSource connectionSource, String tableName,
      List<DatabaseFieldConfig> fieldConfigs) throws SQLException {
    List<FieldType> fieldTypes = new ArrayList<FieldType>();
    for (DatabaseFieldConfig fieldConfig : fieldConfigs) {
      FieldType fieldType = null;
      // walk up the classes until we find the field
      for (Class<?> classWalk = dataClass; classWalk != null; classWalk = classWalk.getSuperclass()) {
        Field field;
        try {
          field = classWalk.getDeclaredField(fieldConfig.getFieldName());
        } catch (NoSuchFieldException e) {
          // we ignore this and just loop hopefully finding it in a upper class
          continue;
        }
        if (field != null) {
          fieldType = new FieldType(connectionSource, tableName, field, fieldConfig, dataClass);
          break;
        }
      }


      if (fieldType == null) {

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    if (value == null) {
      return null;
    } else if (fieldType == null) {
      return value;
    } else if (fieldType.isForeign() && fieldType.getFieldType() == value.getClass()) {
      FieldType idFieldType = fieldType.getForeignIdField();
      return idFieldType.extractJavaFieldValue(value);
    } else {
      return fieldType.convertJavaFieldToSqlArgValue(value);
    }
  }

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   * <b>NOTE:</b> I couldn't remove the code warning associated with this method when used with more than 2 arguments.
   * </p>
   */
  public Where<T, ID> and(Where<T, ID> first, Where<T, ID> second, Where<T, ID>... others) {
    Clause[] clauses = buildClauseArray(others, "AND");
    Clause secondClause = pop("AND");
    Clause firstClause = pop("AND");
    addClause(new ManyClause(firstClause, secondClause, clauses, ManyClause.AND_OPERATION));
    return this;
  }

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   * <b>NOTE:</b> I can't remove the code warning associated with this method. Use the iterator method below.
   * </p>
   */
  public Where<T, ID> or(Where<T, ID> left, Where<T, ID> right, Where<T, ID>... others) {
    Clause[] clauses = buildClauseArray(others, "OR");
    Clause secondClause = pop("OR");
    Clause firstClause = pop("OR");
    addClause(new ManyClause(firstClause, secondClause, clauses, ManyClause.OR_OPERATION));
    return this;
  }

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  @Override
  public String toString() {
    if (clauseStackLevel == 0) {
      return "empty where clause";
    } else {
      Clause clause = peek();
      return "where clause: " + clause;
    }
  }

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  private Clause pop(String label) {
    if (clauseStackLevel == 0) {
      throw new IllegalStateException("Expecting there to be a clause already defined for '" + label
          + "' operation");
    }
    Clause clause = clauseStack[--clauseStackLevel];
    // to help gc
    clauseStack[clauseStackLevel] = null;
    return clause;
  }

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