jdk8-mips64-public/langtools: comparison src/share/classes/com/sun/tools/javac/code/DeferredLintHandler.java

--1:000000000000
+:959103a6100f
+/*
+* Copyright (c) 2011, 2013, 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 com.sun.tools.javac.code;
+import java.util.HashMap;
+import java.util.Map;
+import com.sun.tools.javac.tree.EndPosTable;
+import com.sun.tools.javac.tree.JCTree;
+import com.sun.tools.javac.util.Assert;
+import com.sun.tools.javac.util.Context;
+import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
+import com.sun.tools.javac.util.ListBuffer;
+/**
+*
+* <p><b>This is NOT part of any supported API.
+* If you write code that depends on this, you do so at your own risk.
+* This code and its internal interfaces are subject to change or
+* deletion without notice.</b>
+*/
+public class DeferredLintHandler {
+protected static final Context.Key<DeferredLintHandler> deferredLintHandlerKey =
+new Context.Key<DeferredLintHandler>();
+public static DeferredLintHandler instance(Context context) {
+DeferredLintHandler instance = context.get(deferredLintHandlerKey);
+if (instance == null)
+instance = new DeferredLintHandler(context);
+return instance;
+}
+protected DeferredLintHandler(Context context) {
+context.put(deferredLintHandlerKey, this);
+this.currentPos = IMMEDIATE_POSITION;
+}
+/**An interface for deferred lint reporting - loggers passed to
+* {@link #report(LintLogger) } will be called when
+* {@link #flush(DiagnosticPosition) } is invoked.
+*/
+public interface LintLogger {
+void report();
+}
+private DiagnosticPosition currentPos;
+private Map<DiagnosticPosition, ListBuffer<LintLogger>> loggersQueue = new HashMap<DiagnosticPosition, ListBuffer<LintLogger>>();
+/**Associate the given logger with the current position as set by {@link #setPos(DiagnosticPosition) }.
+* Will be invoked when {@link #flush(DiagnosticPosition) } will be invoked with the same position.
+* <br>
+* Will invoke the logger synchronously if {@link #immediate() } was called
+* instead of {@link #setPos(DiagnosticPosition) }.
+*/
+public void report(LintLogger logger) {
+if (currentPos == IMMEDIATE_POSITION) {
+logger.report();
+} else {
+ListBuffer<LintLogger> loggers = loggersQueue.get(currentPos);
+if (loggers == null) {
+loggersQueue.put(currentPos, loggers = new ListBuffer<>());
+}
+loggers.append(logger);
+}
+}
+/**Invoke all {@link LintLogger}s that were associated with the provided {@code pos}.
+*/
+public void flush(DiagnosticPosition pos) {
+ListBuffer<LintLogger> loggers = loggersQueue.get(pos);
+if (loggers != null) {
+for (LintLogger lintLogger : loggers) {
+lintLogger.report();
+}
+loggersQueue.remove(pos);
+}
+}
+/**Sets the current position to the provided {@code currentPos}. {@link LintLogger}s
+* passed to subsequent invocations of {@link #report(LintLogger) } will be associated
+* with the given position.
+*/
+public DiagnosticPosition setPos(DiagnosticPosition currentPos) {
+DiagnosticPosition prevPosition = this.currentPos;
+this.currentPos = currentPos;
+return prevPosition;
+}
+/**{@link LintLogger}s passed to subsequent invocations of
+* {@link #report(LintLogger) } will be invoked immediately.
+*/
+public DiagnosticPosition immediate() {
+return setPos(IMMEDIATE_POSITION);
+}
+private static final DiagnosticPosition IMMEDIATE_POSITION = new DiagnosticPosition() {
+@Override
+public JCTree getTree() {
+Assert.error();
+return null;
+}
+@Override
+public int getStartPosition() {
+Assert.error();
+return -1;
+}
+@Override
+public int getPreferredPosition() {
+Assert.error();
+return -1;
+}
+@Override
+public int getEndPosition(EndPosTable endPosTable) {
+Assert.error();
+return -1;
+}
+};
+}

Mercurial > jdk8-mips64-public > langtools / file comparison

comparison: src/share/classes/com/sun/tools/javac/code/DeferredLintHandler.java

src/share/classes/com/sun/tools/javac/code/DeferredLintHandler.java