001/** 002 * Copyright 2015 DuraSpace, Inc. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.fcrepo.transform; 017 018import com.google.common.base.Function; 019import org.fcrepo.kernel.utils.iterators.RdfStream; 020 021import java.io.InputStream; 022 023/** 024 * Generic interface for transforming a resource's properties 025 * to an implementation-defined type 026 * 027 * @author cbeer 028 */ 029public interface Transformation<T> extends Function<RdfStream, T> { 030 031 /** 032 * Execute a transform on an rdf stream 033 * @param stream the stream 034 * @return transformed output 035 */ 036 @Override 037 T apply(final RdfStream stream); 038 039 /** 040 * Get the Query the transformation is using 041 * @return query used by the transformation as an input stream 042 */ 043 InputStream getQuery(); 044 045 /** 046 * @param query the query 047 * @return a new Transform of this type, for use as a factory 048 */ 049 Transformation<T> newTransform(InputStream query); 050 051}