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/*
* Copyright (C) 2013 The Android Open Source Project
*
* 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.android.jack.backend.jayce;
import com.android.jack.JackEventType;
import com.android.jack.config.id.Brest;
import com.android.jack.ir.ast.JDefinedClassOrInterface;
import com.android.jack.ir.ast.JSession;
import com.android.jack.ir.ast.JTypeLookupException;
import com.android.jack.ir.ast.Resource;
import com.android.jack.library.FileType;
import com.android.jack.library.IgnoringImportMessage;
import com.android.jack.library.InputJackLibrary;
import com.android.jack.library.InputLibrary;
import com.android.jack.library.LibraryReadingException;
import com.android.jack.library.TypeInInputLibraryLocation;
import com.android.jack.lookup.JLookup;
import com.android.jack.lookup.JLookupException;
import com.android.jack.reporting.Reporter;
import com.android.jack.reporting.Reporter.Severity;
import com.android.jack.resource.ResourceImportConflictException;
import com.android.jack.resource.ResourceImporter;
import com.android.sched.util.HasDescription;
import com.android.sched.util.codec.EnumCodec;
import com.android.sched.util.codec.VariableName;
import com.android.sched.util.config.HasKeyId;
import com.android.sched.util.config.ThreadConfig;
import com.android.sched.util.config.id.PropertyId;
import com.android.sched.util.location.Location;
import com.android.sched.util.log.Event;
import com.android.sched.util.log.LoggerFactory;
import com.android.sched.util.log.Tracer;
import com.android.sched.util.log.TracerFactory;
import com.android.sched.vfs.InputVFile;
import com.android.sched.vfs.VPath;
import java.util.Iterator;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.annotation.Nonnull;
/**
* Imports jayce files from jack libraries in J-AST.
*/
@HasKeyId
public class JayceFileImporter {
@Nonnull
public static final String JAYCE_FILE_EXTENSION = ".jayce";
public static final int JACK_EXTENSION_LENGTH = JAYCE_FILE_EXTENSION.length();
@Nonnull
private final Tracer tracer = TracerFactory.getTracer();
@Nonnull
private static final Logger logger = LoggerFactory.getLogger();
@Nonnull
private final List<InputJackLibrary> jackLibraries;
private static final char VPATH_SEPARATOR = JLookup.PACKAGE_SEPARATOR;
/**
* How to handle file collisions.
*/
@VariableName("policy")
public enum CollisionPolicy implements HasDescription {
KEEP_FIRST("keep the first element encountered"),
FAIL("fail when a collision occurs");
@Nonnull
private String description;
private CollisionPolicy(@Nonnull String description) {
this.description = description;
}
@Override
@Nonnull
public String getDescription() {
return description;
}
}
@Nonnull
public static final PropertyId<CollisionPolicy> COLLISION_POLICY = PropertyId.create(
"jack.import.type.policy",
"Defines the policy to follow concerning type collision",
new EnumCodec<CollisionPolicy>(CollisionPolicy.class, CollisionPolicy.values()).ignoreCase())
.addDefaultValue(CollisionPolicy.FAIL).withCategory(Brest.get());
@Nonnull
private final CollisionPolicy collisionPolicy = ThreadConfig.get(COLLISION_POLICY);
@Nonnull
private final CollisionPolicy resourceCollisionPolicy =
ThreadConfig.get(ResourceImporter.RESOURCE_COLLISION_POLICY);
public JayceFileImporter(@Nonnull List<InputJackLibrary> jackLibraries) {
this.jackLibraries = jackLibraries;
}
public void doImport(@Nonnull JSession session) throws LibraryReadingException {
for (InputJackLibrary jackLibrary : jackLibraries) {
Reporter reporter = session.getReporter();
logger.log(Level.FINE, "Importing {0}", jackLibrary.getLocation().getDescription());
Iterator<InputVFile> jayceFileIt = jackLibrary.iterator(FileType.JAYCE);
while (jayceFileIt.hasNext()) {
InputVFile jayceFile = jayceFileIt.next();
String name = jayceFile.getPathFromRoot().getPathAsString('/');
try {
addImportedTypes(session, name, jackLibrary);
} catch (JLookupException e) {
throw new LibraryReadingException(e);
} catch (TypeImportConflictException e) {
if (collisionPolicy == CollisionPolicy.FAIL) {
throw new LibraryReadingException(e);
} else {
reporter.report(Severity.NON_FATAL, new IgnoringImportMessage(e));
}
}
}
Iterator<InputVFile> rscFileIt = jackLibrary.iterator(FileType.RSC);
while (rscFileIt.hasNext()) {
InputVFile rscFile = rscFileIt.next();
String name = rscFile.getPathFromRoot().getPathAsString('/');
try {
addImportedResource(rscFile, session, name);
} catch (ResourceImportConflictException e) {
if (resourceCollisionPolicy == CollisionPolicy.FAIL) {
throw new LibraryReadingException(e);
} else {
reporter.report(Severity.NON_FATAL, new IgnoringImportMessage(e));
}
}
}
}
}
private void addImportedTypes(@Nonnull JSession session, @Nonnull String path,
@Nonnull InputLibrary intendedInputLibrary) throws TypeImportConflictException,
JTypeLookupException {
Event readEvent = tracer.start(JackEventType.NNODE_READING_FOR_IMPORT);
try {
logger.log(Level.FINEST, "Importing jayce file ''{0}'' from {1}", new Object[] {path,
intendedInputLibrary.getLocation().getDescription()});
String signature = convertJackFilePathToSignature(path);
JDefinedClassOrInterface declaredType =
(JDefinedClassOrInterface) session.getLookup().getType(signature);
if (!isTypeFromLibrary(declaredType, intendedInputLibrary)) {
throw new TypeImportConflictException(declaredType, intendedInputLibrary.getLocation());
} else {
session.addTypeToEmit(declaredType);
}
} finally {
readEvent.end();
}
}
private static boolean isTypeFromLibrary(@Nonnull JDefinedClassOrInterface declaredType,
@Nonnull InputLibrary intendedInputLibrary) {
Location existingSource = declaredType.getLocation();
if (!(existingSource instanceof TypeInInputLibraryLocation)) {
return false;
}
TypeInInputLibraryLocation existingLocation = (TypeInInputLibraryLocation) existingSource;
return intendedInputLibrary.equals(
existingLocation.getInputLibraryLocation().getInputLibrary());
}
@Nonnull
private String convertJackFilePathToSignature(@Nonnull String path) {
String pathWithoutExt = path.substring(0, path.length() - JAYCE_FILE_EXTENSION.length());
return "L" + pathWithoutExt.replace(VPATH_SEPARATOR, JLookup.PACKAGE_SEPARATOR) + ";";
}
private void addImportedResource(@Nonnull InputVFile file, @Nonnull JSession session,
@Nonnull String currentPath) throws ResourceImportConflictException {
VPath path = new VPath(currentPath, VPATH_SEPARATOR);
Resource newResource = new Resource(path, file);
for (Resource existingResource : session.getResources()) {
if (existingResource.getPath().equals(path)) {
throw new ResourceImportConflictException(newResource.getLocation(),
existingResource.getLocation());
}
}
session.addResource(newResource);
}
public static boolean isJackFileName(@Nonnull String name) {
return (name.length() > JACK_EXTENSION_LENGTH) && (name.substring(
name.length() - JACK_EXTENSION_LENGTH).equalsIgnoreCase(JAYCE_FILE_EXTENSION));
}
}
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