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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 2003, 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. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package sun.java2d.loops; | |
| 27 | + | |
| 28 | +/** | |
| 29 | + * GraphicsPrimitiveProxy | |
| 30 | + * | |
| 31 | + * Acts as a proxy for instances of GraphicsPrimitive, enabling lazy | |
| 32 | + * classloading of these primitives. This leads to a substantial | |
| 33 | + * savings in start-up time and footprint. In the typical case, | |
| 34 | + * it has been found that a small number of GraphicsPrimitive instance | |
| 35 | + * actually end up getting instantiated. | |
| 36 | + * <p> | |
| 37 | + * Note that the makePrimitive method should never be invoked on | |
| 38 | + * a GraphicsPrimitiveProxy object since they are instantiated as | |
| 39 | + * soon as they are found in the primitive list and never returned | |
| 40 | + * to the caller. | |
| 41 | + */ | |
| 42 | +public class GraphicsPrimitiveProxy extends GraphicsPrimitive { | |
| 43 | + | |
| 44 | + private Class owner; | |
| 45 | + private String relativeClassName; | |
| 46 | + | |
| 47 | + /** | |
| 48 | + * Create a GraphicsPrimitiveProxy for a primitive with a no-argument | |
| 49 | + * constructor. | |
| 50 | + * | |
| 51 | + * @param owner The owner class for this primitive. The primitive | |
| 52 | + * must be in the same package as this owner. | |
| 53 | + * @param relativeClassName The name of the class this is a proxy for. | |
| 54 | + * This should not include the package. | |
| 55 | + */ | |
| 56 | + public GraphicsPrimitiveProxy(Class owner, String relativeClassName, | |
| 57 | + String methodSignature, | |
| 58 | + int primID, | |
| 59 | + SurfaceType srctype, | |
| 60 | + CompositeType comptype, | |
| 61 | + SurfaceType dsttype) | |
| 62 | + { | |
| 63 | + super(methodSignature, primID, srctype, comptype, dsttype); | |
| 64 | + this.owner = owner; | |
| 65 | + this.relativeClassName = relativeClassName; | |
| 66 | + } | |
| 67 | + | |
| 68 | + public GraphicsPrimitive makePrimitive(SurfaceType srctype, | |
| 69 | + CompositeType comptype, | |
| 70 | + SurfaceType dsttype) { | |
| 71 | + // This should never happen. | |
| 72 | + throw new InternalError("makePrimitive called on a Proxy!"); | |
| 73 | + } | |
| 74 | + | |
| 75 | + // | |
| 76 | + // Come up with the real instance. Called from | |
| 77 | + // GraphicsPrimitiveMgr.locate() | |
| 78 | + // | |
| 79 | + GraphicsPrimitive instantiate() { | |
| 80 | + String name = getPackageName(owner.getName()) + "." | |
| 81 | + + relativeClassName; | |
| 82 | + try { | |
| 83 | + Class clazz = Class.forName(name); | |
| 84 | + GraphicsPrimitive p = (GraphicsPrimitive) clazz.newInstance(); | |
| 85 | + if (!satisfiesSameAs(p)) { | |
| 86 | + throw new RuntimeException("Primitive " + p | |
| 87 | + + " incompatible with proxy for " | |
| 88 | + + name); | |
| 89 | + } | |
| 90 | + return p; | |
| 91 | + } catch (ClassNotFoundException ex) { | |
| 92 | + throw new RuntimeException(ex.toString()); | |
| 93 | + } catch (InstantiationException ex) { | |
| 94 | + throw new RuntimeException(ex.toString()); | |
| 95 | + } catch (IllegalAccessException ex) { | |
| 96 | + throw new RuntimeException(ex.toString()); | |
| 97 | + } | |
| 98 | + // A RuntimeException should never happen in a deployed JDK, because | |
| 99 | + // the regression test GraphicsPrimitiveProxyTest will catch any | |
| 100 | + // of these errors. | |
| 101 | + } | |
| 102 | + | |
| 103 | + private static String getPackageName(String className) { | |
| 104 | + int lastDotIdx = className.lastIndexOf('.'); | |
| 105 | + if (lastDotIdx < 0) { | |
| 106 | + return className; | |
| 107 | + } | |
| 108 | + return className.substring(0, lastDotIdx); | |
| 109 | + } | |
| 110 | + | |
| 111 | + public GraphicsPrimitive traceWrap() { | |
| 112 | + return instantiate().traceWrap(); | |
| 113 | + } | |
| 114 | +} | |