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1 /* |
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2 * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 |
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24 package vm.runtime.defmeth.shared.data; |
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25 |
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26 import vm.runtime.defmeth.shared.builder.TestBuilder; |
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27 |
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28 /** |
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29 * Wrapper around some Interface instance. It delegates all calls to |
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30 * underlying instance. Lazy resolution of a target instance by it's name |
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31 * allows to delay resolution till runtime and "tie-the-knot" in recursive |
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32 * hierarchies. |
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33 */ |
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34 public class InterfaceLazyAdapter extends ClazzLazyAdapter implements Interface { |
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35 |
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36 private final TestBuilder builder; |
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37 private final String name; |
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38 |
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39 private Interface target; |
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40 |
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41 public InterfaceLazyAdapter(TestBuilder builder, String name) { |
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42 super(builder, name); |
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43 |
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44 this.builder = builder; |
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45 this.name = name; |
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46 } |
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47 |
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48 private Interface delegate() { |
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49 if (target == null) { |
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50 target = (Interface)builder.lookup(name); |
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51 } |
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52 |
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53 return target; |
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54 } |
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55 |
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56 @Override |
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57 public Interface[] parents() { |
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58 return delegate().parents(); |
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59 } |
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60 |
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61 @Override |
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62 public void visit(Visitor v) { |
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63 delegate().visit(v); |
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64 } |
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65 } |