1 /* 2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package java.util.stream; 24 25 /** 26 * A base type for test operations 27 */ 28 interface IntermediateTestOp<E_IN, E_OUT> { 29 30 @SuppressWarnings({"rawtypes", "unchecked"}) chain(AbstractPipeline upstream, IntermediateTestOp<?, T> op)31 public static<T> AbstractPipeline chain(AbstractPipeline upstream, 32 IntermediateTestOp<?, T> op) { 33 if (op instanceof StatelessTestOp) 34 return StatelessTestOp.chain(upstream, (StatelessTestOp) op); 35 36 if (op instanceof StatefulTestOp) 37 return StatefulTestOp.chain(upstream, (StatefulTestOp) op); 38 39 throw new IllegalStateException("Unknown test op type: " + op.getClass().getName()); 40 } 41 } 42