Ejemplo n.º 1
0
 // [PJYF Nov 5 2004]
 // This is major Hack to generate a diffenrent bind dictionary for update and insert form the
 // one for select and delete
 public void addUpdateListAttribute(EOAttribute attribute, Object value) {
   String attributeName = this.sqlStringForAttribute(attribute);
   String attributeValue = this.sqlStringForForInsertOrUpdateValue(value, attribute.name());
   attributeValue = this.formatSQLString(attributeValue, attribute.writeFormat());
   this.appendItemToListString(
       _NSStringUtilities.concat(attributeName, " = ", attributeValue), this._listString());
 }
Ejemplo n.º 2
0
 /*
  * [PJYF Oct 19 2004]
  * This is a bad hack to get WO to create indes for external keys.
  * We use the primary key constrain generation to create our indexes.
  * But we need to be carefull not to overwrite previous constrains
  *
  */
 protected boolean isSinglePrimaryKeyAttribute(EOAttribute attribute) {
   if (attribute == null) return false;
   EOEntity entity = (EOEntity) attribute.entity();
   if ((entity == null) || entity.isAbstractEntity() || (entity.externalName() == null))
     return false;
   NSArray primaryKeyAttributes = entity.primaryKeyAttributes();
   if (primaryKeyAttributes.count() != 1) return false;
   return attribute.name().equals(((EOAttribute) primaryKeyAttributes.lastObject()).name());
 }
Ejemplo n.º 3
0
  /**
   * Overrides the parent implementation to provide a more efficient mechanism for generating
   * primary keys, while generating the primary key support on the fly.
   *
   * @param count the batch size
   * @param entity the entity requesting primary keys
   * @param channel open JDBCChannel
   * @return NSArray of NSDictionary where each dictionary corresponds to a unique primary key value
   */
  public NSArray newPrimaryKeys(int count, EOEntity entity, JDBCChannel channel) {
    if (isPrimaryKeyGenerationNotSupported(entity)) {
      return null;
    }

    EOAttribute attribute = (EOAttribute) entity.primaryKeyAttributes().lastObject();
    String attrName = attribute.name();
    boolean isIntType = "i".equals(attribute.valueType());

    NSMutableArray results = new NSMutableArray(count);
    String sequenceName = sequenceNameForEntity(entity);
    DB2Expression expression = new DB2Expression(entity);

    boolean succeeded = false;
    for (int tries = 0; !succeeded && tries < 2; tries++) {
      while (results.count() < count) {
        try {
          StringBuffer sql = new StringBuffer();
          sql.append("SELECT ");
          sql.append("next value for " + sequenceName + " AS KEY");
          sql.append(" from sysibm.sysdummy1");
          expression.setStatement(sql.toString());
          channel.evaluateExpression(expression);
          try {
            NSDictionary row;
            while ((row = channel.fetchRow()) != null) {
              Enumeration pksEnum = row.allValues().objectEnumerator();
              while (pksEnum.hasMoreElements()) {
                Number pkObj = (Number) pksEnum.nextElement();
                Number pk;
                if (isIntType) {
                  pk = Integer.valueOf(pkObj.intValue());
                } else {
                  pk = Long.valueOf(pkObj.longValue());
                }
                results.addObject(new NSDictionary(pk, attrName));
              }
            }
          } finally {
            channel.cancelFetch();
          }
          succeeded = true;
        } catch (JDBCAdaptorException ex) {
          throw ex;
        }
      }
    }

    if (results.count() != count) {
      throw new IllegalStateException(
          "Unable to generate primary keys from the sequence for " + entity + ".");
    }

    return results;
  }
Ejemplo n.º 4
0
 // [PJYF Oct 19 2004]
 // We need to prepend the question mark with a type attribute to get the jdbc driver to do the
 // right thing.
 // only for B (Binary)
 public NSMutableDictionary bindVariableDictionaryForAttribute(
     EOAttribute attribute, Object value) {
   String prepend = "";
   String externalType =
       (attribute.externalType() != null ? attribute.externalType().toLowerCase() : "");
   if ("binary".equals(externalType)) {
     prepend = "B";
   }
   return new NSMutableDictionary(
       new Object[] {attribute.name(), prepend + "?", attribute, value},
       new Object[] {
         BindVariableNameKey,
         BindVariablePlaceHolderKey,
         BindVariableAttributeKey,
         BindVariableValueKey
       });
 }
Ejemplo n.º 5
0
 // [PJYF Nov 5 2004]
 // This is major Hack to generate a diffenrent bind dictionary for update and insert form the
 // one for select and delete
 public void addInsertListAttribute(EOAttribute attribute, Object value) {
   this.appendItemToListString(this.sqlStringForAttribute(attribute), this._listString());
   String attributeValue = this.sqlStringForForInsertOrUpdateValue(value, attribute.name());
   attributeValue = this.formatSQLString(attributeValue, attribute.writeFormat());
   this.appendItemToListString(attributeValue, _valueList());
 }
Ejemplo n.º 6
0
 private AttributeRetriever(EOAttribute attribute) {
   this.propertyName = attribute.name();
   this.attribute = attribute;
 }
Ejemplo n.º 7
0
    @Override
    @SuppressWarnings("unchecked")
    public String sqlStringForSQLExpression(EOQualifier eoqualifier, EOSQLExpression e) {
      ERXToManyQualifier qualifier = (ERXToManyQualifier) eoqualifier;
      StringBuilder result = new StringBuilder();
      EOEntity targetEntity = e.entity();

      NSArray<String> toManyKeys = NSArray.componentsSeparatedByString(qualifier.key(), ".");
      EORelationship targetRelationship = null;
      for (int i = 0; i < toManyKeys.count() - 1; i++) {
        targetRelationship = targetEntity.anyRelationshipNamed(toManyKeys.objectAtIndex(i));
        targetEntity = targetRelationship.destinationEntity();
      }
      targetRelationship = targetEntity.relationshipNamed(toManyKeys.lastObject());
      targetEntity = targetRelationship.destinationEntity();

      if (targetRelationship.joins() == null || targetRelationship.joins().isEmpty()) {
        // we have a flattened many to many
        String definitionKeyPath = targetRelationship.definition();
        NSArray<String> definitionKeys =
            NSArray.componentsSeparatedByString(definitionKeyPath, ".");
        EOEntity lastStopEntity = targetRelationship.entity();
        EORelationship firstHopRelationship =
            lastStopEntity.relationshipNamed(definitionKeys.objectAtIndex(0));
        EOEntity endOfFirstHopEntity = firstHopRelationship.destinationEntity();
        EOJoin join = firstHopRelationship.joins().objectAtIndex(0); // assumes 1 join
        EOAttribute sourceAttribute = join.sourceAttribute();
        EOAttribute targetAttribute = join.destinationAttribute();
        EORelationship secondHopRelationship =
            endOfFirstHopEntity.relationshipNamed(definitionKeys.objectAtIndex(1));
        join = secondHopRelationship.joins().objectAtIndex(0); // assumes 1 join
        EOAttribute secondHopSourceAttribute = join.sourceAttribute();

        NSMutableArray<String> lastStopPKeyPath = toManyKeys.mutableClone();
        lastStopPKeyPath.removeLastObject();
        lastStopPKeyPath.addObject(firstHopRelationship.name());
        lastStopPKeyPath.addObject(targetAttribute.name());
        String firstHopRelationshipKeyPath = lastStopPKeyPath.componentsJoinedByString(".");
        result.append(e.sqlStringForAttributeNamed(firstHopRelationshipKeyPath));
        result.append(" IN ( SELECT ");

        result.append(lastStopEntity.externalName());
        result.append('.');
        result.append(lastStopEntity.primaryKeyAttributes().objectAtIndex(0).columnName());

        result.append(" FROM ");

        result.append(lastStopEntity.externalName());
        result.append(',');

        lastStopPKeyPath.removeLastObject();
        String tableAliasForJoinTable =
            (String)
                e.aliasesByRelationshipPath()
                    .objectForKey(
                        lastStopPKeyPath.componentsJoinedByString(".")); // "j"; //+random#
        result.append(endOfFirstHopEntity.externalName());
        result.append(' ');
        result.append(tableAliasForJoinTable);

        result.append(" WHERE ");

        appendColumnForAttributeToStringBuilder(sourceAttribute, result);
        result.append('=');
        result.append(e.sqlStringForAttributeNamed(firstHopRelationshipKeyPath));

        if (qualifier.elements() != null) {
          NSArray pKeys = ERXEOAccessUtilities.primaryKeysForObjects(qualifier.elements());
          result.append(" AND ");

          result.append(tableAliasForJoinTable);
          result.append('.');
          result.append(secondHopSourceAttribute.columnName());

          result.append(" IN (");
          EOAttribute pk = targetEntity.primaryKeyAttributes().lastObject();
          for (int i = 0; i < pKeys.count(); i++) {

            Object key = pKeys.objectAtIndex(i);
            String keyString = e.formatValueForAttribute(key, pk);
            // AK: default is is broken
            if ("NULL".equals(keyString)) {
              keyString = "" + key;
            }
            result.append(keyString);
            if (i < pKeys.count() - 1) {
              result.append(',');
            }
          }
          result.append(") ");
        }
        result.append(" GROUP BY ");
        appendColumnForAttributeToStringBuilder(sourceAttribute, result);

        result.append(" HAVING COUNT(*)");
        if (qualifier.minCount() <= 0) {
          result.append("=" + qualifier.elements().count());
        } else {
          result.append(">=" + qualifier.minCount());
        }
        result.append(" )");
      } else {
        throw new RuntimeException("not implemented!!");
      }
      return result.toString();
    }