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/*
* 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.cfg;
import com.google.gwt.core.ext.Linker;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.linker.LinkerOrder;
import com.google.gwt.core.ext.linker.LinkerOrder.Order;
import com.google.gwt.core.ext.typeinfo.TypeOracle;
import com.google.gwt.dev.CompilerContext;
import com.google.gwt.dev.javac.CompilationProblemReporter;
import com.google.gwt.dev.javac.CompilationState;
import com.google.gwt.dev.javac.CompilationStateBuilder;
import com.google.gwt.dev.resource.Resource;
import com.google.gwt.dev.resource.ResourceOracle;
import com.google.gwt.dev.resource.impl.DefaultFilters;
import com.google.gwt.dev.resource.impl.PathPrefix;
import com.google.gwt.dev.resource.impl.PathPrefixSet;
import com.google.gwt.dev.resource.impl.ResourceFilter;
import com.google.gwt.dev.resource.impl.ResourceOracleImpl;
import com.google.gwt.dev.util.Empty;
import com.google.gwt.dev.util.Util;
import com.google.gwt.dev.util.log.speedtracer.CompilerEventType;
import com.google.gwt.dev.util.log.speedtracer.SpeedTracerLogger;
import com.google.gwt.dev.util.log.speedtracer.SpeedTracerLogger.Event;
import com.google.gwt.thirdparty.guava.common.base.Charsets;
import com.google.gwt.thirdparty.guava.common.base.Predicates;
import com.google.gwt.thirdparty.guava.common.collect.ImmutableList;
import com.google.gwt.thirdparty.guava.common.collect.Iterators;
import com.google.gwt.thirdparty.guava.common.collect.Lists;
import com.google.gwt.thirdparty.guava.common.collect.Maps;
import com.google.gwt.thirdparty.guava.common.collect.Sets;
import java.io.File;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Deque;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
/**
* Represents a module specification. In principle, this could be built without
* XML for unit tests.
*/
public class ModuleDef implements DepsInfoProvider {
private static final ResourceFilter NON_JAVA_RESOURCES = new ResourceFilter() {
@Override
public boolean allows(String path) {
return !path.endsWith(".java") && !path.endsWith(".class");
}
};
private static final Comparator> REV_NAME_CMP =
new Comparator>() {
@Override
public int compare(Map.Entry entry1, Map.Entry entry2) {
String key1 = entry1.getKey();
String key2 = entry2.getKey();
// intentionally reversed
return key2.compareTo(key1);
}
};
public static boolean isValidModuleName(String moduleName) {
// Check for an empty string between two periods.
if (moduleName.contains("..")) {
return false;
}
// Insure the package name components are a valid Java ident.
String[] parts = moduleName.split("\\.");
for (int i = 0; i < parts.length - 1; i++) {
String part = parts[i];
if (!Util.isValidJavaIdent(part)) {
return false;
}
}
return true;
}
/**
* All resources found on the public path, specified by directives in
* modules (or the implicit ./public directory). Marked 'lazy' because it does not
* start searching for resources until a query is made.
*/
protected ResourceOracleImpl lazyPublicOracle;
private final Set activeLinkers = new LinkedHashSet();
private String activePrimaryLinker;
private boolean collapseAllProperties;
private final DefaultFilters defaultFilters;
private final List entryPointTypeNames = new ArrayList();
/**
* A stack that keeps track of the name of the current module in the enterModule/exitModule tree.
*/
private final Deque currentLibraryModuleNames = Lists.newLinkedList();
private final Set gwtXmlFiles = new HashSet();
private final Set inheritedModules = new HashSet();
/**
* Contains files other than .java and .class files (such as CSS and PNG files) from either the
* source or resource paths.
*/
private ResourceOracleImpl lazyResourcesOracle;
/**
* Contains all files from the source path, specified by and
* directives in modules (or the implicit ./client directory).
*/
private ResourceOracleImpl lazySourceOracle;
private final Map> linkerTypesByName =
new LinkedHashMap>();
private final long moduleDefCreationTime = System.currentTimeMillis();
private final String name;
/**
* Must use a separate field to track override, because setNameOverride() will
* get called every time a module is inherited, but only the last one matters.
*/
private String nameOverride;
private final Properties properties = new Properties();
private PathPrefixSet publicPrefixSet = new PathPrefixSet();
private Set resourcePrefixes = Sets.newHashSet();
private final ResourceLoader resources;
private boolean resourcesScanned;
private final Deque rules = Lists.newLinkedList();
private final Scripts scripts = new Scripts();
private final Map servletClassNamesByPath = new HashMap();
private final PathPrefixSet sourcePrefixSet;
private final Styles styles = new Styles();
/**
* A mapping from names of modules to path to their associated .gwt.xml file.
*/
private Map gwtXmlPathByModuleName = Maps.newHashMap();
public ModuleDef(String name) {
this(name, ResourceLoaders.fromContextClassLoader());
}
public ModuleDef(String name, ResourceLoader resources) {
this(name, resources, true, true);
}
/**
* Constructs a ModuleDef.
*/
public ModuleDef(String name, ResourceLoader resources, boolean monolithic,
boolean mergePathPrefixes) {
this.name = name;
this.resources = resources;
sourcePrefixSet = new PathPrefixSet(mergePathPrefixes);
defaultFilters = new DefaultFilters();
}
public synchronized void addEntryPointTypeName(String typeName) {
entryPointTypeNames.add(typeName);
}
public void addGwtXmlFile(File xmlFile) {
gwtXmlFiles.add(xmlFile);
}
public void addLinker(String name) {
Class clazz = getLinker(name);
assert clazz != null;
LinkerOrder order = clazz.getAnnotation(LinkerOrder.class);
if (order.value() == Order.PRIMARY) {
if (activePrimaryLinker != null) {
activeLinkers.remove(activePrimaryLinker);
}
activePrimaryLinker = name;
}
activeLinkers.add(name);
}
public synchronized void addPublicPackage(String publicPackage, String[] includeList,
String[] excludeList, String[] skipList, boolean defaultExcludes, boolean caseSensitive) {
if (lazyPublicOracle != null) {
throw new IllegalStateException("Already normalized");
}
publicPrefixSet.add(new PathPrefix(getCurrentLibraryModuleName(), publicPackage, defaultFilters
.customResourceFilter(includeList, excludeList, skipList, defaultExcludes, caseSensitive),
true, excludeList));
}
public void addResourcePath(String resourcePath) {
if (lazyResourcesOracle != null) {
throw new IllegalStateException("Already normalized");
}
resourcePrefixes.add(new PathPrefix(getCurrentLibraryModuleName(), resourcePath,
NON_JAVA_RESOURCES, false, null));
}
public void addRule(Rule rule) {
getRules().addFirst(rule);
}
public void addSourcePackage(String sourcePackage, String[] includeList, String[] excludeList,
String[] skipList, boolean defaultExcludes, boolean caseSensitive) {
addSourcePackageImpl(sourcePackage, includeList, excludeList, skipList, defaultExcludes,
caseSensitive, false);
}
public void addSourcePackageImpl(String sourcePackage, String[] includeList,
String[] excludeList, String[] skipList, boolean defaultExcludes, boolean caseSensitive,
boolean isSuperSource) {
if (lazySourceOracle != null) {
throw new IllegalStateException("Already normalized");
}
PathPrefix pathPrefix = new PathPrefix(getCurrentLibraryModuleName(),
sourcePackage, defaultFilters.customJavaFilter(includeList, excludeList, skipList,
defaultExcludes, caseSensitive), isSuperSource, excludeList);
sourcePrefixSet.add(pathPrefix);
}
public void addSuperSourcePackage(String superSourcePackage, String[] includeList,
String[] excludeList, String[] skipList, boolean defaultExcludes, boolean caseSensitive) {
addSourcePackageImpl(superSourcePackage, includeList, excludeList, skipList, defaultExcludes,
caseSensitive, true);
}
public void clearEntryPoints() {
entryPointTypeNames.clear();
}
/**
* Deactivate a linker by name. Returns false if the linker was not active, true otherwise.
*/
public boolean deactivateLinker(String linkerName) {
return activeLinkers.remove(linkerName);
}
/**
* Associate a Linker class with a symbolic name. If the name had been
* previously assigned, this method will redefine the name. If the redefined
* linker had been previously added to the set of active linkers, the old
* active linker will be replaced with the new linker.
*/
public void defineLinker(TreeLogger logger, String name, Class linker)
throws UnableToCompleteException {
Class old = getLinker(name);
if (old != null) {
// Redefining an existing name
if (activePrimaryLinker.equals(name)) {
// Make sure the new one is also a primary linker
if (!linker.getAnnotation(LinkerOrder.class).value().equals(Order.PRIMARY)) {
logger.log(TreeLogger.ERROR, "Redefining primary linker " + name
+ " with non-primary implementation " + linker.getName());
throw new UnableToCompleteException();
}
} else if (activeLinkers.contains(name)) {
// Make sure it's a not a primary linker
if (linker.getAnnotation(LinkerOrder.class).value().equals(Order.PRIMARY)) {
logger.log(TreeLogger.ERROR, "Redefining non-primary linker " + name
+ " with primary implementation " + linker.getName());
throw new UnableToCompleteException();
}
}
}
linkerTypesByName.put(name, linker);
}
/**
* Called as module tree parsing enters and exits individual module file of various types and so
* provides the ModuleDef with an opportunity to keep track of what context it is currently
* operating.
*/
public void enterModule(String canonicalModuleName) {
currentLibraryModuleNames.push(canonicalModuleName);
}
public void exitModule() {
currentLibraryModuleNames.pop();
}
public synchronized Resource findPublicFile(String partialPath) {
ensureResourcesScanned();
return lazyPublicOracle.getResource(partialPath);
}
public synchronized String findServletForPath(String actual) {
// Walk in backwards sorted order to find the longest path match first.
Set> entrySet = servletClassNamesByPath.entrySet();
Entry[] entries = Util.toArray(Entry.class, entrySet);
Arrays.sort(entries, REV_NAME_CMP);
for (int i = 0, n = entries.length; i < n; ++i) {
String mapping = entries[i].getKey();
/*
* Ensure that URLs that match the servlet mapping, including those that
* have additional path_info, get routed to the correct servlet.
*
* See "Inside Servlets", Second Edition, pg. 208
*/
if (actual.equals(mapping) || actual.startsWith(mapping + "/")) {
return entries[i].getValue();
}
}
return null;
}
/**
* Returns the Resource for a source file if it is found; null
* otherwise.
*
* @param partialPath the partial path of the source file
* @return the resource for the requested source file
*/
public synchronized Resource findSourceFile(String partialPath) {
ensureResourcesScanned();
return lazySourceOracle.getResource(partialPath);
}
public Set getActiveLinkerNames() {
return new LinkedHashSet(activeLinkers);
}
public Set> getActiveLinkers() {
Set> toReturn = new LinkedHashSet>();
for (String linker : activeLinkers) {
assert linkerTypesByName.containsKey(linker) : linker;
toReturn.add(linkerTypesByName.get(linker));
}
return toReturn;
}
public Class getActivePrimaryLinker() {
assert linkerTypesByName.containsKey(activePrimaryLinker) : activePrimaryLinker;
return linkerTypesByName.get(activePrimaryLinker);
}
/**
* Strictly for statistics gathering. There is no guarantee that the source
* oracle has been initialized.
*/
public String[] getAllSourceFiles() {
ensureResourcesScanned();
return lazySourceOracle.getPathNames().toArray(Empty.STRINGS);
}
public synchronized ResourceOracle getBuildResourceOracle() {
if (lazyResourcesOracle == null) {
lazyResourcesOracle = new ResourceOracleImpl(TreeLogger.NULL, resources);
PathPrefixSet pathPrefixes = lazySourceOracle.getPathPrefixes();
// For backwards compatibility, register source resource paths as build resource paths as
// well.
PathPrefixSet newPathPrefixes = new PathPrefixSet();
for (PathPrefix pathPrefix : pathPrefixes.values()) {
newPathPrefixes.add(new PathPrefix(pathPrefix.getModuleName(), pathPrefix.getPrefix(),
NON_JAVA_RESOURCES, pathPrefix.shouldReroot(), null));
}
// Register build resource paths.
for (PathPrefix resourcePathPrefix : resourcePrefixes) {
newPathPrefixes.add(resourcePathPrefix);
}
lazyResourcesOracle.setPathPrefixes(newPathPrefixes);
lazyResourcesOracle.scanResources(TreeLogger.NULL);
} else {
ensureResourcesScanned();
}
return lazyResourcesOracle;
}
/**
* Returns the physical name for the module by which it can be found in the
* classpath.
*/
public String getCanonicalName() {
return name;
}
public CompilationState getCompilationState(TreeLogger logger, CompilerContext compilerContext)
throws UnableToCompleteException {
ensureResourcesScanned();
CompilationState compilationState = CompilationStateBuilder.buildFrom(
logger, compilerContext, compilerContext.getSourceResourceOracle().getResources());
checkForSeedTypes(logger, compilationState);
return compilationState;
}
public synchronized String[] getEntryPointTypeNames() {
final int n = entryPointTypeNames.size();
return entryPointTypeNames.toArray(new String[n]);
}
public synchronized String getFunctionName() {
return getName().replace('.', '_');
}
public List getGeneratorRules() {
return ImmutableList.copyOf(
Iterators.filter(rules.iterator(), Predicates.instanceOf(RuleGenerateWith.class)));
}
@Override
public String getGwtXmlFilePath(String moduleName) {
return gwtXmlPathByModuleName.get(moduleName);
}
/**
* Calculates a hash of the filenames of all the input files for the GWT compiler.
*
*
This is needed because the list of files could change without affecting the timestamp.
* For example, consider a glob that matches fewer files than before because a file was
* deleted.
*/
public int getInputFilenameHash() {
List filenames = new ArrayList();
filenames.addAll(gwtXmlPathByModuleName.values());
for (Resource resource : getResourcesNewerThan(Integer.MIN_VALUE)) {
filenames.add(resource.getLocation());
}
// Take the first four bytes of the SHA-1 hash.
Collections.sort(filenames);
MessageDigest digest;
try {
digest = MessageDigest.getInstance("SHA-1");
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("SHA-1 unavailable", e);
}
for (String filename : filenames) {
digest.update(filename.getBytes(Charsets.UTF_8));
}
byte[] bytes = digest.digest();
return (bytes[0] << 24) | (bytes[1] << 16) | (bytes[2] << 8) | bytes[3];
}
public Class getLinker(String name) {
return linkerTypesByName.get(name);
}
public Map> getLinkers() {
return linkerTypesByName;
}
public synchronized String getName() {
return nameOverride != null ? nameOverride : name;
}
/**
* The properties that have been defined.
*/
public synchronized Properties getProperties() {
return properties;
}
public ResourceOracleImpl getPublicResourceOracle() {
ensureResourcesScanned();
return lazyPublicOracle;
}
public long getResourceLastModified() {
long resourceLastModified = 1000;
Set allResources = Sets.newHashSet();
allResources.addAll(getPublicResourceOracle().getResources());
allResources.addAll(getSourceResourceOracle().getResources());
allResources.addAll(getBuildResourceOracle().getResources());
for (Resource resource : allResources) {
resourceLastModified = Math.max(resourceLastModified, resource.getLastModified());
}
return resourceLastModified;
}
public Set getResourcesNewerThan(long modificationTime) {
Set newerResources = Sets.newHashSet();
for (Resource resource : getPublicResourceOracle().getResources()) {
if (resource.getLastModified() > modificationTime) {
newerResources.add(resource);
}
}
for (Resource resource : getSourceResourceOracle().getResources()) {
if (resource.getLastModified() > modificationTime) {
newerResources.add(resource);
}
}
for (Resource resource : getBuildResourceOracle().getResources()) {
if (resource.getLastModified() > modificationTime) {
newerResources.add(resource);
}
}
return newerResources;
}
/**
* Gets a reference to the internal rules for this module def.
*/
public synchronized Deque getRules() {
return rules;
}
/**
* Gets a reference to the internal scripts list for this module def.
*/
public Scripts getScripts() {
return scripts;
}
public synchronized String[] getServletPaths() {
return servletClassNamesByPath.keySet().toArray(Empty.STRINGS);
}
@Override
public Set getSourceModuleNames(String typeSourceName) {
ensureResourcesScanned();
return lazySourceOracle.getSourceModulesByTypeSourceName().get(typeSourceName);
}
public synchronized ResourceOracle getSourceResourceOracle() {
ensureResourcesScanned();
return lazySourceOracle;
}
/**
* Gets a reference to the internal styles list for this module def.
*/
public Styles getStyles() {
return styles;
}
public boolean isGwtXmlFileStale() {
return lastModified() > moduleDefCreationTime;
}
public boolean isInherited(String moduleName) {
return inheritedModules.contains(moduleName);
}
public long lastModified() {
long lastModified = 0;
for (File xmlFile : gwtXmlFiles) {
if (xmlFile.exists()) {
lastModified = Math.max(lastModified, xmlFile.lastModified());
}
}
return lastModified > 0 ? lastModified : moduleDefCreationTime;
}
/**
* For convenience in unit tests, servlets can be automatically loaded and
* mapped in the embedded web server. If a servlet is already mapped to the
* specified path, it is replaced.
*
* @param path the url path at which the servlet resides
* @param servletClassName the name of the servlet to publish
*/
public synchronized void mapServlet(String path, String servletClassName) {
servletClassNamesByPath.put(path, servletClassName);
}
public void recordModuleGwtXmlFile(String moduleName, String fileSourcePath) {
gwtXmlPathByModuleName.put(moduleName, fileSourcePath);
}
public synchronized void refresh() {
resourcesScanned = false;
}
/**
* Mainly for testing and decreasing compile times.
*/
public void setCollapseAllProperties(boolean collapse) {
collapseAllProperties = collapse;
}
/**
* Override the module's apparent name. Setting this value to
* nullwill disable the name override.
*/
public synchronized void setNameOverride(String nameOverride) {
this.nameOverride = nameOverride;
}
void addBindingPropertyDefinedValue(BindingProperty bindingProperty, String token) {
bindingProperty.addDefinedValue(bindingProperty.getRootCondition(), token);
}
void addConfigurationPropertyValue(ConfigurationProperty configurationProperty, String value) {
configurationProperty.addValue(value);
}
void addInheritedModules(String moduleName) {
inheritedModules.add(moduleName);
}
/**
* The final method to call when everything is setup. Before calling this
* method, several of the getter methods may not be called. After calling this
* method, the add methods may not be called.
*
* @param logger Logs the activity.
*/
synchronized void normalize(TreeLogger logger) {
Event moduleDefNormalize =
SpeedTracerLogger.start(CompilerEventType.MODULE_DEF, "phase", "normalize");
// Normalize property providers.
//
for (BindingProperty prop : properties.getBindingProperties()) {
if (collapseAllProperties) {
prop.addCollapsedValues("*");
}
prop.normalizeCollapsedValues();
/*
* Create a default property provider for any properties with more than
* one possible value and no existing provider.
*/
if (prop.getProvider() == null && prop.getConstrainedValue() == null) {
String src = "{";
src += "return __gwt_getMetaProperty(\"";
src += prop.getName();
src += "\"); }";
prop.setProvider(new PropertyProvider(src));
}
}
// Create the public path.
TreeLogger branch = Messages.PUBLIC_PATH_LOCATIONS.branch(logger, null);
lazyPublicOracle = new ResourceOracleImpl(branch, resources);
lazyPublicOracle.setPathPrefixes(publicPrefixSet);
// Create the source path.
branch = Messages.SOURCE_PATH_LOCATIONS.branch(logger, null);
lazySourceOracle = new ResourceOracleImpl(branch, resources);
lazySourceOracle.setPathPrefixes(sourcePrefixSet);
moduleDefNormalize.end();
}
void setConfigurationPropertyValue(ConfigurationProperty configurationProperty, String value) {
configurationProperty.setValue(value);
}
private void checkForSeedTypes(TreeLogger logger, CompilationState compilationState)
throws UnableToCompleteException {
// Sanity check the seed types and don't even start it they're missing.
boolean seedTypesMissing = false;
TypeOracle typeOracle = compilationState.getTypeOracle();
if (typeOracle.findType("java.lang.Object") == null) {
CompilationProblemReporter.logErrorTrace(logger, TreeLogger.ERROR,
compilationState.getCompilerContext(), "java.lang.Object", true);
seedTypesMissing = true;
} else {
TreeLogger branch = logger.branch(TreeLogger.TRACE, "Finding entry point classes", null);
String[] typeNames = getEntryPointTypeNames();
for (int i = 0; i < typeNames.length; i++) {
String typeName = typeNames[i];
if (typeOracle.findType(typeName) == null) {
CompilationProblemReporter.logErrorTrace(branch, TreeLogger.ERROR,
compilationState.getCompilerContext(), typeName, true);
seedTypesMissing = true;
}
}
}
if (seedTypesMissing) {
throw new UnableToCompleteException();
}
}
private synchronized void ensureResourcesScanned() {
if (resourcesScanned) {
return;
}
resourcesScanned = true;
Event moduleDefEvent = SpeedTracerLogger.start(
CompilerEventType.MODULE_DEF, "phase", "refresh", "module", getName());
if (lazyResourcesOracle != null) {
lazyResourcesOracle.scanResources(TreeLogger.NULL);
}
lazyPublicOracle.scanResources(TreeLogger.NULL);
lazySourceOracle.scanResources(TreeLogger.NULL);
moduleDefEvent.end();
}
private String getCurrentLibraryModuleName() {
return currentLibraryModuleNames.isEmpty() ? "" : currentLibraryModuleNames.peek();
}
}
