| /* |
| * Copyright (c) 1998, 2003, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.java2d.loops; |
| |
| /** |
| * GraphicsPrimitiveProxy |
| * |
| * Acts as a proxy for instances of GraphicsPrimitive, enabling lazy |
| * classloading of these primitives. This leads to a substantial |
| * savings in start-up time and footprint. In the typical case, |
| * it has been found that a small number of GraphicsPrimitive instance |
| * actually end up getting instantiated. |
| * <p> |
| * Note that the makePrimitive method should never be invoked on |
| * a GraphicsPrimitiveProxy object since they are instantiated as |
| * soon as they are found in the primitive list and never returned |
| * to the caller. |
| */ |
| public class GraphicsPrimitiveProxy extends GraphicsPrimitive { |
| |
| private Class owner; |
| private String relativeClassName; |
| |
| /** |
| * Create a GraphicsPrimitiveProxy for a primitive with a no-argument |
| * constructor. |
| * |
| * @param owner The owner class for this primitive. The primitive |
| * must be in the same package as this owner. |
| * @param relativeClassName The name of the class this is a proxy for. |
| * This should not include the package. |
| */ |
| public GraphicsPrimitiveProxy(Class owner, String relativeClassName, |
| String methodSignature, |
| int primID, |
| SurfaceType srctype, |
| CompositeType comptype, |
| SurfaceType dsttype) |
| { |
| super(methodSignature, primID, srctype, comptype, dsttype); |
| this.owner = owner; |
| this.relativeClassName = relativeClassName; |
| } |
| |
| public GraphicsPrimitive makePrimitive(SurfaceType srctype, |
| CompositeType comptype, |
| SurfaceType dsttype) { |
| // This should never happen. |
| throw new InternalError("makePrimitive called on a Proxy!"); |
| } |
| |
| // |
| // Come up with the real instance. Called from |
| // GraphicsPrimitiveMgr.locate() |
| // |
| GraphicsPrimitive instantiate() { |
| String name = getPackageName(owner.getName()) + "." |
| + relativeClassName; |
| try { |
| Class clazz = Class.forName(name); |
| GraphicsPrimitive p = (GraphicsPrimitive) clazz.newInstance(); |
| if (!satisfiesSameAs(p)) { |
| throw new RuntimeException("Primitive " + p |
| + " incompatible with proxy for " |
| + name); |
| } |
| return p; |
| } catch (ClassNotFoundException ex) { |
| throw new RuntimeException(ex.toString()); |
| } catch (InstantiationException ex) { |
| throw new RuntimeException(ex.toString()); |
| } catch (IllegalAccessException ex) { |
| throw new RuntimeException(ex.toString()); |
| } |
| // A RuntimeException should never happen in a deployed JDK, because |
| // the regression test GraphicsPrimitiveProxyTest will catch any |
| // of these errors. |
| } |
| |
| private static String getPackageName(String className) { |
| int lastDotIdx = className.lastIndexOf('.'); |
| if (lastDotIdx < 0) { |
| return className; |
| } |
| return className.substring(0, lastDotIdx); |
| } |
| |
| public GraphicsPrimitive traceWrap() { |
| return instantiate().traceWrap(); |
| } |
| } |