Example usage for org.apache.cassandra.db.marshal MapType getInstance

Introduction

In this page you can find the example usage for org.apache.cassandra.db.marshal MapType getInstance.

Prototype

public static MapType<?, ?> getInstance(TypeParser parser) throws ConfigurationException, SyntaxException 

Source Link

Usage

From source file:com.impetus.client.cassandra.datahandler.CassandraDataHandlerBase.java

License:Apache License

/**
 * Sets the element collection.//from   w  ww .  j  a  va 2  s  . com
 * 
 * @param entity
 *            the entity
 * @param thriftColumnValue
 *            the thrift column value
 * @param metaModel
 *            the meta model
 * @param attribute
 *            the attribute
 * @return the object
 */
private Object setElementCollection(Object entity, Object thriftColumnValue, MetamodelImpl metaModel,
        Attribute attribute) {
    String cqlColumnMetadata = null;
    Map<ByteBuffer, String> schemaTypes = this.clientBase.getCqlMetadata().getValue_types();
    for (Map.Entry<ByteBuffer, String> schemaType : schemaTypes.entrySet()) {

        String key = UTF8Serializer.instance.deserialize((schemaType.getKey()));
        if (key.equals(((AbstractAttribute) attribute).getJavaMember().getName())) {
            cqlColumnMetadata = schemaType.getValue();
        }
    }

    Field field = (Field) ((AbstractAttribute) attribute).getJavaMember();
    Class embeddedClass = ((AbstractAttribute) attribute).getBindableJavaType();

    if (List.class.isAssignableFrom(((Field) attribute.getJavaMember()).getType())) {
        ListType listType = null;
        try {
            listType = ListType.getInstance(new TypeParser(
                    cqlColumnMetadata.substring(cqlColumnMetadata.indexOf("("), cqlColumnMetadata.length())));
        } catch (ConfigurationException | SyntaxException e) {
            log.error(e.getMessage());
            throw new KunderaException("Error while getting instance of ListType " + e);
        }
        return setElementCollectionList(listType, ByteBuffer.wrap((byte[]) thriftColumnValue), entity, field,
                metaModel, embeddedClass, true);

    } else if (Set.class.isAssignableFrom(((Field) attribute.getJavaMember()).getType())) {
        SetType setType = null;
        try {
            setType = SetType.getInstance(new TypeParser(
                    cqlColumnMetadata.substring(cqlColumnMetadata.indexOf("("), cqlColumnMetadata.length())));
        } catch (ConfigurationException | SyntaxException e) {
            log.error(e.getMessage());
            throw new KunderaException("Error while getting instance of SetType " + e);
        }
        return setElementCollectionSet(setType, ByteBuffer.wrap((byte[]) thriftColumnValue), entity, field,
                metaModel, embeddedClass, true);

    } else if (Map.class.isAssignableFrom(((Field) attribute.getJavaMember()).getType())) {
        MapType mapType = null;
        try {
            mapType = MapType.getInstance(new TypeParser(
                    cqlColumnMetadata.substring(cqlColumnMetadata.indexOf("("), cqlColumnMetadata.length())));
        } catch (ConfigurationException | SyntaxException e) {
            log.error(e.getMessage());
            throw new KunderaException("Error while getting instance of MapType " + e);
        }
        return setElementCollectionMap(mapType, ByteBuffer.wrap((byte[]) thriftColumnValue), entity, field,
                metaModel, embeddedClass, true);
    }

    return entity;

}

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