com.google.gwt.dev.javac.CompilationUnitInvalidator Maven / Gradle / Ivy
/*
* 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 units, Map validClasses) {
logger = logger.branch(TreeLogger.TRACE, "Removing invalidated units");
// Assume all units are valid at first.
Set currentlyValidUnits = new LinkedHashSet();
Set currentlyValidClasses = new HashSet();
for (CompilationUnit unit : units) {
if (!unit.isError()) {
currentlyValidUnits.add(unit);
for (CompiledClass cc : unit.getCompiledClasses()) {
currentlyValidClasses.add(cc.getSourceName());
}
}
}
for (Entry entry : validClasses.entrySet()) {
if (!entry.getValue().getUnit().isError()) {
currentlyValidClasses.add(entry.getKey());
}
}
boolean changed;
do {
changed = false;
for (Iterator it = currentlyValidUnits.iterator(); it.hasNext();) {
CompilationUnit unitToCheck = it.next();
List 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);
}
}