Java Code Examples for org.apache.olingo.commons.api.edm.EdmEntityType#getKeyPropertyRef()

private static UriParameter keyValuePair(UriTokenizer tokenizer,
    final String keyPredicateName, final EdmEntityType edmEntityType,
    final Edm edm, final EdmType referringType, final Map<String, AliasQueryOption> aliases)
    throws UriParserException, UriValidationException {
  final EdmKeyPropertyRef keyPropertyRef = edmEntityType.getKeyPropertyRef(keyPredicateName);
  final EdmProperty edmProperty = keyPropertyRef == null ? null : keyPropertyRef.getProperty();
  if (edmProperty == null) {
    throw new UriValidationException(keyPredicateName + " is not a valid key property name.",
        UriValidationException.MessageKeys.INVALID_KEY_PROPERTY, keyPredicateName);
  }
  ParserHelper.requireNext(tokenizer, TokenKind.EQ);
  if (tokenizer.next(TokenKind.COMMA) || tokenizer.next(TokenKind.CLOSE) || tokenizer.next(TokenKind.EOF)) {
    throw new UriParserSyntaxException("Key value expected.", UriParserSyntaxException.MessageKeys.SYNTAX);
  }
  if (nextPrimitiveTypeValue(tokenizer, (EdmPrimitiveType) edmProperty.getType(), edmProperty.isNullable())) {
    return createUriParameter(edmProperty, keyPredicateName, tokenizer.getText(), edm, referringType, aliases);
  } else {
    throw new UriParserSemanticException(keyPredicateName + " has not a valid  key value.",
        UriParserSemanticException.MessageKeys.INVALID_KEY_VALUE, keyPredicateName);
  }
}
 

@Override
public String buildKeyPredicate(final EdmEntityType edmEntityType, final Entity entity) throws SerializerException {
  StringBuilder result = new StringBuilder();
  final List<String> keyNames = edmEntityType.getKeyPredicateNames();
  boolean first = true;
  for (final String keyName : keyNames) {
    EdmKeyPropertyRef refType = edmEntityType.getKeyPropertyRef(keyName);
    if (first) {
      first = false;
    } else {
      result.append(',');
    }
    if (keyNames.size() > 1) {
      result.append(Encoder.encode(keyName)).append('=');
    }
    final EdmProperty edmProperty =  refType.getProperty();
    if (edmProperty == null) {
      throw new SerializerException("Property not found (possibly an alias): " + keyName,
          SerializerException.MessageKeys.MISSING_PROPERTY, keyName);
    }
    final EdmPrimitiveType type = (EdmPrimitiveType) edmProperty.getType();
    final Object propertyValue = findPropertyRefValue(entity, refType);
    try {
      final String value = type.toUriLiteral(
          type.valueToString(propertyValue,
              edmProperty.isNullable(), edmProperty.getMaxLength(),
              edmProperty.getPrecision(), edmProperty.getScale(), edmProperty.isUnicode()));
      result.append(Encoder.encode(value));
    } catch (final EdmPrimitiveTypeException e) {
      throw new SerializerException("Wrong key value!", e,
          SerializerException.MessageKeys.WRONG_PROPERTY_VALUE, edmProperty.getName(), 
          propertyValue != null ? propertyValue.toString(): null);
    }
  }
  return result.toString();
}
 

public Entity read(final EdmEntityType edmEntityType, final EntityCollection entitySet,
    final List<UriParameter> keys) throws DataProviderException {
  try {
    for (final Entity entity : entitySet.getEntities()) {
      boolean found = true;
      for (final UriParameter key : keys) {
        EdmKeyPropertyRef refType = edmEntityType.getKeyPropertyRef(key.getName());
        Object value =  findPropertyRefValue(entity, refType);
        
        final EdmProperty property = refType.getProperty();
        final EdmPrimitiveType type = (EdmPrimitiveType) property.getType();
        
        if (key.getExpression() != null && !(key.getExpression() instanceof Literal)) {
          throw new DataProviderException("Expression in key value is not supported yet!",
              HttpStatusCode.NOT_IMPLEMENTED);
        }
        Object keyValue = null;
        final String text = key.getAlias() == null ? key.getText() : ((Literal) key.getExpression()).getText();
        if (Calendar.class.isAssignableFrom(value.getClass())) {
          keyValue = type.valueOfString(type.fromUriLiteral(text),
              property.isNullable(), property.getMaxLength(), property.getPrecision(), property.getScale(),
              property.isUnicode(), Calendar.class);
        } else {
          keyValue = type.valueOfString(type.fromUriLiteral(text),
              property.isNullable(), property.getMaxLength(), property.getPrecision(), property.getScale(),
              property.isUnicode(), value.getClass());
        }
        if (!value.equals(keyValue)) {
          found = false;
          break;
        }
      }
      if (found) {
        return entity;
      }
    }
    return null;
  } catch (final EdmPrimitiveTypeException e) {
    throw new DataProviderException("Wrong key!", HttpStatusCode.BAD_REQUEST, e);
  }
}
 

public Entity readDataFromEntity(final EdmEntityType edmEntityType,
    final List<UriParameter> keys) throws DataProviderException {
  EntityCollection coll = data.get(edmEntityType.getName());
  List<Entity> entities = coll.getEntities();
  try {
    for (final Entity entity : entities) {
      boolean found = true;
      for (final UriParameter key : keys) {
        EdmKeyPropertyRef refType = edmEntityType.getKeyPropertyRef(key.getName());
        Object value =  findPropertyRefValue(entity, refType);
        
        final EdmProperty property = refType.getProperty();
        final EdmPrimitiveType type = (EdmPrimitiveType) property.getType();
        
        if (key.getExpression() != null && !(key.getExpression() instanceof Literal)) {
          throw new DataProviderException("Expression in key value is not supported yet!",
              HttpStatusCode.NOT_IMPLEMENTED);
        }
        final String text = key.getAlias() == null ? key.getText() : ((Literal) key.getExpression()).getText();
        Object keyValue = null;
        if (Calendar.class.isAssignableFrom(value.getClass())) {
          keyValue = type.valueOfString(type.fromUriLiteral(text),
              property.isNullable(), property.getMaxLength(), property.getPrecision(), property.getScale(),
              property.isUnicode(), Calendar.class);
        } else {
          keyValue = type.valueOfString(type.fromUriLiteral(text),
              property.isNullable(), property.getMaxLength(), property.getPrecision(), property.getScale(),
              property.isUnicode(), value.getClass());
        }
        if (!value.equals(keyValue)) {
          found = false;
          break;
        }
      }
      if (found) {
        return entity;
      }
    }
    return null;
  } catch (final EdmPrimitiveTypeException e) {
    throw new DataProviderException("Wrong key!", HttpStatusCode.BAD_REQUEST, e);
  }
}