1 /* 2 * Copyright (c) 2013, 2018, 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 package vm.runtime.defmeth.shared.data; 25 26 import vm.runtime.defmeth.shared.builder.TestBuilder; 27 28 /** 29 * Wrapper around some Interface instance. It delegates all calls to 30 * underlying instance. Lazy resolution of a target instance by it's name 31 * allows to delay resolution till runtime and "tie-the-knot" in recursive 32 * hierarchies. 33 */ 34 public class InterfaceLazyAdapter extends ClazzLazyAdapter implements Interface { 35 36 private final TestBuilder builder; 37 private final String name; 38 39 private Interface target; 40 41 public InterfaceLazyAdapter(TestBuilder builder, String name) { 42 super(builder, name); 43 44 this.builder = builder; 45 this.name = name; 46 } 47 48 private Interface delegate() { 49 if (target == null) { 50 target = (Interface)builder.lookup(name); 51 } 52 53 return target; 54 } 55 56 @Override 57 public Interface[] parents() { 58 return delegate().parents(); 59 } 60 61 @Override 62 public void visit(Visitor v) { 63 delegate().visit(v); 64 } 65 }