| /* |
| * Copyright 2008 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.dev.javac; |
| |
| import com.google.gwt.core.ext.TreeLogger; |
| |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.LinkedHashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.Map.Entry; |
| |
| /** |
| * Helper class to invalidate units in a set based on errors or references to |
| * other invalidate units. |
| */ |
| public class CompilationUnitInvalidator { |
| |
| public static void retainValidUnits(TreeLogger logger, |
| Collection<CompilationUnit> units, Map<String, CompiledClass> validClasses) { |
| logger = logger.branch(TreeLogger.TRACE, "Removing invalidated units"); |
| |
| // Assume all units are valid at first. |
| Set<CompilationUnit> currentlyValidUnits = new LinkedHashSet<CompilationUnit>(); |
| Set<String> currentlyValidClasses = new HashSet<String>(); |
| for (CompilationUnit unit : units) { |
| if (!unit.isError()) { |
| currentlyValidUnits.add(unit); |
| for (CompiledClass cc : unit.getCompiledClasses()) { |
| currentlyValidClasses.add(cc.getSourceName()); |
| } |
| } |
| } |
| for (Entry<String, CompiledClass> entry : validClasses.entrySet()) { |
| if (!entry.getValue().getUnit().isError()) { |
| currentlyValidClasses.add(entry.getKey()); |
| } |
| } |
| |
| boolean changed; |
| do { |
| changed = false; |
| for (Iterator<CompilationUnit> it = currentlyValidUnits.iterator(); it.hasNext();) { |
| CompilationUnit unitToCheck = it.next(); |
| List<String> invalidRefs = unitToCheck.getDependencies().findMissingApiRefs( |
| currentlyValidClasses); |
| if (invalidRefs.size() > 0) { |
| it.remove(); |
| for (CompiledClass cc : unitToCheck.getCompiledClasses()) { |
| currentlyValidClasses.remove(cc.getSourceName()); |
| } |
| changed = true; |
| TreeLogger branch = logger.branch(TreeLogger.DEBUG, |
| "Compilation unit '" + unitToCheck |
| + "' is removed due to invalid reference(s):"); |
| for (String ref : invalidRefs) { |
| branch.log(TreeLogger.DEBUG, ref); |
| } |
| } |
| } |
| } while (changed); |
| |
| units.retainAll(currentlyValidUnits); |
| } |
| } |