1 /* 2 * Copyright (c) 2011, 2016, 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 24 25 package org.graalvm.compiler.graph.iterators; 26 27 import java.util.Iterator; 28 29 import org.graalvm.compiler.graph.Node; 30 31 public class FilteredNodeIterable<T extends Node> implements NodeIterable<T> { 32 33 protected final NodeIterable<T> nodeIterable; 34 protected NodePredicate predicate = NodePredicates.alwaysTrue(); 35 36 public FilteredNodeIterable(NodeIterable<T> nodeIterable) { 37 this.nodeIterable = nodeIterable; 38 } 39 40 public FilteredNodeIterable<T> and(NodePredicate nodePredicate) { 41 this.predicate = this.predicate.and(nodePredicate); 42 return this; 43 } 44 45 @Override 46 public Iterator<T> iterator() { 47 return new PredicatedProxyNodeIterator<>(nodeIterable.iterator(), predicate); 48 } 49 50 @SuppressWarnings("unchecked") 51 @Override 52 public <F extends T> FilteredNodeIterable<F> filter(Class<F> clazz) { 53 return (FilteredNodeIterable<F>) this.and(NodePredicates.isA(clazz)); 54 } 55 56 @Override 57 public FilteredNodeIterable<T> filter(NodePredicate p) { 58 return this.and(p); 59 } 60 61 }