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/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.java2d.marlin;
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import jdk.internal.misc.JavaLangAccess;
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import jdk.internal.misc.SharedSecrets;
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public final class MarlinUtils {
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// TODO: use sun.util.logging.PlatformLogger once in JDK9
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private static final java.util.logging.Logger log;
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static {
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if (MarlinConst.useLogger) {
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log = java.util.logging.Logger.getLogger("sun.java2d.marlin");
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} else {
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log = null;
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}
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}
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private MarlinUtils() {
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// no-op
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}
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public static void logInfo(final String msg) {
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if (MarlinConst.useLogger) {
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log.info(msg);
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} else if (MarlinConst.enableLogs) {
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System.out.print("INFO: ");
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System.out.println(msg);
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}
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}
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public static void logException(final String msg, final Throwable th) {
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if (MarlinConst.useLogger) {
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// log.warning(msg, th);
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log.log(java.util.logging.Level.WARNING, msg, th);
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} else if (MarlinConst.enableLogs) {
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System.out.print("WARNING: ");
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System.out.println(msg);
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th.printStackTrace(System.err);
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}
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}
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// Returns the caller's class and method's name; best effort
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// if cannot infer, return the logger's name.
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static String getCallerInfo(String className) {
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String sourceClassName = null;
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String sourceMethodName = null;
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JavaLangAccess access = SharedSecrets.getJavaLangAccess();
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Throwable throwable = new Throwable();
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int depth = access.getStackTraceDepth(throwable);
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boolean lookingForClassName = true;
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for (int ix = 0; ix < depth; ix++) {
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// Calling getStackTraceElement directly prevents the VM
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// from paying the cost of building the entire stack frame.
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StackTraceElement frame = access.getStackTraceElement(throwable, ix);
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String cname = frame.getClassName();
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if (lookingForClassName) {
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// Skip all frames until we have found the first frame having the class name.
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if (cname.equals(className)) {
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lookingForClassName = false;
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}
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} else {
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if (!cname.equals(className)) {
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// We've found the relevant frame.
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sourceClassName = cname;
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sourceMethodName = frame.getMethodName();
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break;
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}
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}
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}
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if (sourceClassName != null) {
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return sourceClassName + " " + sourceMethodName;
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} else {
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return "unknown";
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}
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}
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}
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