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Eclipse Compiler for Java(TM)
/*******************************************************************************
* Copyright (c) 2016, 2018 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*
*******************************************************************************/
package org.eclipse.jdt.internal.compiler.lookup;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.function.Supplier;
import java.util.stream.Stream;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.env.IModuleAwareNameEnvironment;
import org.eclipse.jdt.internal.compiler.env.IUpdatableModule;
import org.eclipse.jdt.internal.compiler.util.HashtableOfPackage;
import org.eclipse.jdt.internal.compiler.util.SimpleLookupTable;
import org.eclipse.jdt.internal.compiler.util.SimpleSetOfCharArray;
/**
* This class serves a dual purpose
*
* First, it canonically represents modules in the world of bindings.
*
*
* Secondly, it adds a graph layer on top of {@link LookupEnvironment}:
* ModuleBindins are linked through "read" edges as per JPMS (see java.lang.module.Configuration).
* Additionally, each ModuleBinding holds its own instance of LookupEnviroment,
* capturing all packages and types that are visible to the current module.
* As a subset of all visible types, the ModuleBinding knows the set of
* packages locally declared in this module.
*
*/
public class ModuleBinding extends Binding implements IUpdatableModule {
/** Name of the unnamed module. */
public static final char[] UNNAMED = "".toCharArray(); //$NON-NLS-1$
/** Name to represent unnamed modules in --add-exports & --add-reads options. */
public static final char[] ALL_UNNAMED = "ALL-UNNAMED".toCharArray(); //$NON-NLS-1$
/** Module name for package/type lookup that doesn't care about modules. */
public static final char[] ANY = "".toCharArray(); //$NON-NLS-1$
/** Module name for package/type lookup that should look into all named modules. */
public static final char[] ANY_NAMED = "".toCharArray(); //$NON-NLS-1$
public static class UnNamedModule extends ModuleBinding {
private static final char[] UNNAMED_READABLE_NAME = "".toCharArray(); //$NON-NLS-1$
@SuppressWarnings("synthetic-access")
UnNamedModule(LookupEnvironment env) {
super(env);
}
@Override
public ModuleBinding[] getAllRequiredModules() {
return Binding.NO_MODULES;
}
@Override
public boolean canAccess(PackageBinding pkg) {
ModuleBinding mod = pkg.enclosingModule;
if (mod != null && mod != this)
return mod.isPackageExportedTo(pkg, this);
return true;
}
@Override
public boolean isPackageExportedTo(PackageBinding pkg, ModuleBinding client) {
// per JLS 7.7.5 an unnamed module exports all its packages
return pkg.isDeclaredIn(this) && pkg.hasCompilationUnit(false);
}
@Override
public boolean isUnnamed() {
return true;
}
@Override
public char[] nameForLookup() {
return ANY;
}
@Override
public char[] readableName() {
return UNNAMED_READABLE_NAME;
}
@Override
public String toString() {
return "The Unnamed Module"; //$NON-NLS-1$
}
}
public char[] moduleName;
protected ModuleBinding[] requires;
protected ModuleBinding[] requiresTransitive;
protected PackageBinding[] exportedPackages;
private Map exportRestrictions; // RHS is unresolved names, because unresolvable names are legal in this position
protected PackageBinding[] openedPackages;
private Map openRestrictions; // RHS is unresolved names, because unresolvable names are legal in this position
protected TypeBinding[] uses;
protected TypeBinding[] services;
public Map implementations;
public char[] mainClassName;
private SimpleSetOfCharArray packageNames;
public int modifiers;
public LookupEnvironment environment;
public long tagBits;
public int defaultNullness = NO_NULL_DEFAULT;
ModuleBinding[] requiredModules = null;
boolean isAuto = false;
private boolean[] isComplete = new boolean[UpdateKind.values().length];
private Set transitiveRequires;
boolean isPackageLookupActive = false; // to prevent cyclic lookup caused by synthetic reads edges on behalf of auto-modules.
SimpleLookupTable storedAnnotations = null;
/**
* Packages declared in this module (indexed by qualified name).
* We consider a package as declared in a module,
* if a compilation unit associated with the module
* declares the package or a subpackage thereof.
*/
public HashtableOfPackage declaredPackages;
/** Constructor for the unnamed module. */
private ModuleBinding(LookupEnvironment env) {
this.moduleName = ModuleBinding.UNNAMED;
this.environment = env;
this.requires = Binding.NO_MODULES;
this.requiresTransitive = Binding.NO_MODULES;
this.exportedPackages = Binding.NO_PACKAGES;
this.openedPackages = Binding.NO_PACKAGES;
this.declaredPackages = new HashtableOfPackage(0);
Arrays.fill(this.isComplete, true);
}
/* For error binding and sub class SourceModuleBinding. */
ModuleBinding(char[] moduleName) {
this.moduleName = moduleName;
this.requires = Binding.NO_MODULES;
this.requiresTransitive = Binding.NO_MODULES;
this.exportedPackages = Binding.NO_PACKAGES;
this.openedPackages = Binding.NO_PACKAGES;
this.uses = Binding.NO_TYPES;
this.services = Binding.NO_TYPES;
this.declaredPackages = new HashtableOfPackage(5);
}
/* For sub class BinaryModuleBinding */
protected ModuleBinding(char[] moduleName, LookupEnvironment existingEnvironment) {
this.moduleName = moduleName;
this.requires = Binding.NO_MODULES;
this.requiresTransitive = Binding.NO_MODULES;
this.environment = new LookupEnvironment(existingEnvironment.root, this);
this.declaredPackages = new HashtableOfPackage(5);
}
public PackageBinding[] getExports() {
completeIfNeeded(UpdateKind.PACKAGE);
return this.exportedPackages;
}
public String[] getExportRestrictions(PackageBinding pack) {
completeIfNeeded(UpdateKind.PACKAGE);
if (this.exportRestrictions != null) {
SimpleSetOfCharArray set = this.exportRestrictions.get(pack);
if (set != null) {
char[][] names = new char[set.elementSize][];
set.asArray(names);
return CharOperation.charArrayToStringArray(names);
}
}
return CharOperation.NO_STRINGS;
}
public PackageBinding[] getOpens() {
completeIfNeeded(UpdateKind.PACKAGE);
return this.openedPackages;
}
public String[] getOpenRestrictions(PackageBinding pack) {
completeIfNeeded(UpdateKind.PACKAGE);
if (this.openRestrictions != null) {
SimpleSetOfCharArray set = this.openRestrictions.get(pack);
if (set != null) {
char[][] names = new char[set.elementSize][];
set.asArray(names);
return CharOperation.charArrayToStringArray(names);
}
}
return CharOperation.NO_STRINGS;
}
public TypeBinding[] getImplementations(TypeBinding binding) {
if (this.implementations != null) {
return this.implementations.get(binding);
}
return null;
}
public ModuleBinding[] getRequires() {
completeIfNeeded(UpdateKind.MODULE);
return this.requires;
}
public ModuleBinding[] getRequiresTransitive() {
completeIfNeeded(UpdateKind.MODULE);
return this.requiresTransitive;
}
public TypeBinding[] getUses() {
return this.uses;
}
public TypeBinding[] getServices() {
return this.services;
}
private void completeIfNeeded(IUpdatableModule.UpdateKind kind) {
if (!this.isComplete[kind.ordinal()]) {
this.isComplete[kind.ordinal()] = true;
if (this.environment.nameEnvironment instanceof IModuleAwareNameEnvironment) {
((IModuleAwareNameEnvironment) this.environment.nameEnvironment).applyModuleUpdates(this, kind);
}
}
}
// --- Implement IUpdatableModule: ---
@Override
public void addReads(char[] requiredModuleName) {
ModuleBinding requiredModule = this.environment.getModule(requiredModuleName);
if (requiredModule != null) {
int len = this.requires.length;
if (len == 0) {
this.requires = new ModuleBinding[] { requiredModule };
} else {
System.arraycopy(this.requires, 0, this.requires = new ModuleBinding[len+1], 0, len);
this.requires[len] = requiredModule;
}
} else {
// TODO(SHMOD) report error
}
// update known packages:
HashtableOfPackage knownPackages = this.environment.knownPackages;
for (int i = 0; i < knownPackages.valueTable.length; i++) {
PackageBinding packageBinding = knownPackages.valueTable[i];
if (packageBinding == null) continue;
PackageBinding newBinding = requiredModule.getVisiblePackage(packageBinding.compoundName);
newBinding = SplitPackageBinding.combine(newBinding, packageBinding, this);
if (packageBinding != newBinding) {
knownPackages.valueTable[i] = newBinding;
if (this.declaredPackages.containsKey(newBinding.readableName()))
this.declaredPackages.put(newBinding.readableName(), newBinding);
}
}
}
@Override
public void addExports(char[] packageName, char[][] targetModules) {
PackageBinding declaredPackage = getVisiblePackage(CharOperation.splitOn('.', packageName));
if (declaredPackage != null && declaredPackage.isValidBinding())
addResolvedExport(declaredPackage, targetModules);
}
@Override
public void setMainClassName(char[] mainClassName) {
this.mainClassName = mainClassName;
}
@Override
public void setPackageNames(SimpleSetOfCharArray packageNames) {
this.packageNames = packageNames;
}
// for code gen:
/** @return array of names, which may contain nulls. */
public char[][] getPackageNamesForClassFile() {
if (this.packageNames == null)
return null;
for (PackageBinding packageBinding : this.exportedPackages)
this.packageNames.add(packageBinding.readableName());
for (PackageBinding packageBinding : this.openedPackages)
this.packageNames.add(packageBinding.readableName());
if (this.implementations != null)
for (TypeBinding[] types : this.implementations.values())
for (TypeBinding typeBinding : types)
this.packageNames.add(((ReferenceBinding)typeBinding).fPackage.readableName());
return this.packageNames.values;
}
// ---
public void addResolvedExport(PackageBinding declaredPackage, char[][] targetModules) {
int len = this.exportedPackages.length;
if (declaredPackage == null || !declaredPackage.isValidBinding()) {
// FIXME(SHMOD) use a problem binding? See https://bugs.eclipse.org/518794#c13
return;
}
if (len == 0) {
this.exportedPackages = new PackageBinding[] { declaredPackage };
} else {
System.arraycopy(this.exportedPackages, 0, this.exportedPackages = new PackageBinding[len+1], 0, len);
this.exportedPackages[len] = declaredPackage;
}
declaredPackage.isExported = Boolean.TRUE;
recordExportRestrictions(declaredPackage, targetModules);
}
public void addResolvedOpens(PackageBinding declaredPackage, char[][] targetModules) {
int len = this.openedPackages.length;
if (declaredPackage == null || !declaredPackage.isValidBinding()) {
// FIXME(SHMOD) use a problem binding? See https://bugs.eclipse.org/518794#c13
return;
}
if (len == 0) {
this.openedPackages = new PackageBinding[] { declaredPackage };
} else {
System.arraycopy(this.openedPackages, 0, this.openedPackages = new PackageBinding[len+1], 0, len);
this.openedPackages[len] = declaredPackage;
}
recordOpensRestrictions(declaredPackage, targetModules);
}
protected void recordExportRestrictions(PackageBinding exportedPackage, char[][] targetModules) {
if (targetModules != null && targetModules.length > 0) {
SimpleSetOfCharArray targetModuleSet = new SimpleSetOfCharArray(targetModules.length);
for (int i = 0; i < targetModules.length; i++) {
targetModuleSet.add(targetModules[i]);
}
if (this.exportRestrictions == null)
this.exportRestrictions = new HashMap<>();
this.exportRestrictions.put(exportedPackage, targetModuleSet);
}
}
protected void recordOpensRestrictions(PackageBinding openedPackage, char[][] targetModules) {
if (targetModules != null && targetModules.length > 0) {
SimpleSetOfCharArray targetModuleSet = new SimpleSetOfCharArray(targetModules.length);
for (int i = 0; i < targetModules.length; i++) {
targetModuleSet.add(targetModules[i]);
}
if (this.openRestrictions == null)
this.openRestrictions = new HashMap<>();
this.openRestrictions.put(openedPackage, targetModuleSet);
}
}
Stream getRequiredModules(boolean transitiveOnly) {
return Stream.of(transitiveOnly ? this.getRequiresTransitive() : this.getRequires());
}
private void collectAllDependencies(Set deps) {
getRequiredModules(false).forEach(m -> {
if (deps.add(m)) {
m.collectAllDependencies(deps);
}
});
}
private void collectTransitiveDependencies(Set deps) {
getRequiredModules(true).forEach(m -> {
if (deps.add(m)) {
m.collectTransitiveDependencies(deps);
}
});
}
// All modules required by this module, either directly or indirectly
public Supplier> dependencyGraphCollector() {
return () -> getRequiredModules(false)
.collect(HashSet::new,
(set, mod) -> {
set.add(mod);
mod.collectAllDependencies(set);
},
HashSet::addAll);
}
// All direct and transitive dependencies of this module
public Supplier> dependencyCollector() {
return () -> getRequiredModules(false)
.collect(HashSet::new,
(set, mod) -> {
set.add(mod);
mod.collectTransitiveDependencies(set);
},
HashSet::addAll);
}
/**
* Get all the modules required by this module
* All required modules include modules explicitly specified as required in the module declaration
* as well as implicit dependencies - those specified as ' requires transitive ' by one of the
* dependencies
*
* @return
* An array of all required modules
*/
public ModuleBinding[] getAllRequiredModules() {
if (this.requiredModules != null)
return this.requiredModules;
Collection allRequires = dependencyCollector().get();
if (allRequires.contains(this)) {
// TODO(SHMOD): report (when? where?)
return NO_MODULES; // avoid entering unbounded recursion due to cyclic requires
}
ModuleBinding javaBase = this.environment.javaBaseModule();
// add java.base?
if (!CharOperation.equals(this.moduleName, TypeConstants.JAVA_BASE) // ... not if this *is* java.base
&& javaBase != null // ... nor when java.base is absent
&& javaBase != this.environment.UnNamedModule) // ..... or faked by the unnamed module
{
allRequires.add(javaBase);
}
return this.requiredModules = allRequires.size() > 0 ? allRequires.toArray(new ModuleBinding[allRequires.size()]) : Binding.NO_MODULES;
}
/** Answer the name of this module. The unnamed module is identified by {@link #UNNAMED}. */
@Override
public char[] name() {
return this.moduleName;
}
/**
* Answer the name of this module as it should be used for package or type lookup.
* Unnamed and automatic modules answer {@link #ANY} or {@link #ANY_NAMED} resp.,
* to signal that lookup should search in all accessible (named) modules.
*/
public char[] nameForLookup() {
return this.moduleName;
}
/**
* Check if the specified package is owned by the current module and exported to the client module.
* True if the package appears in the list of exported packages and when the export is targeted,
* the module appears in the targets of the exports statement.
* @param pkg - the package whose visibility is to be checked
* @param client - the module that wishes to use the package
* @return true if the package is visible to the client module, false otherwise
*/
public boolean isPackageExportedTo(PackageBinding pkg, ModuleBinding client) {
// TODO(SHMOD): cache the result?
PackageBinding resolved = null;
if (pkg instanceof SplitPackageBinding) {
resolved = ((SplitPackageBinding) pkg).getIncarnation(this);
} else if (pkg.enclosingModule == this) {
resolved = pkg;
}
if (resolved != null) {
if (this.isAuto) { // all packages are exported by an automatic module
return pkg.enclosingModule == this; // no transitive export
}
PackageBinding[] initializedExports = getExports();
for (int i = 0; i < initializedExports.length; i++) {
PackageBinding export = initializedExports[i];
if (export.subsumes(resolved)) {
if (this.exportRestrictions != null) {
SimpleSetOfCharArray restrictions = this.exportRestrictions.get(export);
if (restrictions != null) {
if (client.isUnnamed())
return restrictions.includes(ALL_UNNAMED);
else
return restrictions.includes(client.name());
}
}
return true;
}
}
}
return false;
}
/**
* Return a package binding if there exists a package named name in this module's context and it can be seen by this module.
* A package can be seen by this module if it is declared in this module or any other module read by this module
* (JLS 7.4.3 for packages based on JLS 7.3 for compilation units).
* Package exports are not considered for visibility check (only when checking "uniquely visible" (JLS 7.4.3)).
*
* The returned package may be a {@link SplitPackageBinding}, if more than one package of the given name is visible.
*
*
* When asked via the unnamed module or an automatic module all other named modules are considered visible.
*
*/
public PackageBinding getTopLevelPackage(char[] name) {
// check caches:
PackageBinding binding = this.declaredPackages.get(name);
if (binding != null)
return binding;
binding = this.environment.getPackage0(name);
if (binding != null)
return binding;
binding = getVisiblePackage(null, name, true);
// remember:
if (binding != null) {
this.environment.knownPackages.put(name, binding);
binding = addPackage(binding, false);
} else {
this.environment.knownPackages.put(name, LookupEnvironment.TheNotFoundPackage);
}
return binding;
}
PackageBinding getDeclaredPackage(char[][] parentName, char[] name) {
// check caches:
char[][] subPkgCompoundName = CharOperation.arrayConcat(parentName, name);
char[] fullFlatName = CharOperation.concatWith(subPkgCompoundName, '.');
PackageBinding pkg = this.declaredPackages.get(fullFlatName);
if (pkg != null)
return pkg;
PackageBinding parent = parentName.length == 0 ? null : getVisiblePackage(parentName);
PackageBinding binding = new PackageBinding(subPkgCompoundName, parent, this.environment, this);
// remember
this.declaredPackages.put(fullFlatName, binding);
if (parent == null) {
this.environment.knownPackages.put(name, binding);
}
return binding;
}
// Given parent is visible in this module, see if there is sub package named name visible in this module
PackageBinding getVisiblePackage(PackageBinding parent, char[] name, boolean considerRequiredModules) {
// check caches:
char[][] parentName = parent == null ? CharOperation.NO_CHAR_CHAR : parent.compoundName;
char[][] subPkgCompoundName = CharOperation.arrayConcat(parentName, name);
char[] fullFlatName = CharOperation.concatWith(subPkgCompoundName, '.');
PackageBinding pkg = this.declaredPackages.get(fullFlatName);
if (pkg != null)
return pkg;
if (parent != null)
pkg = parent.getPackage0(name);
else
pkg = this.environment.getPackage0(name);
if (pkg != null) {
if (pkg == LookupEnvironment.TheNotFoundPackage)
return null;
else
return addPackage(pkg, false);
}
PackageBinding binding = null;
boolean packageMayBeIncomplete = !considerRequiredModules;
if (this.environment.useModuleSystem) {
IModuleAwareNameEnvironment moduleEnv = (IModuleAwareNameEnvironment) this.environment.nameEnvironment;
char[][] declaringModuleNames = moduleEnv.getModulesDeclaringPackage(parentName, name, nameForLookup());
if (declaringModuleNames != null) {
if (!this.isUnnamed() && CharOperation.containsEqual(declaringModuleNames, this.moduleName)) {
// declared here, not yet known, so create it now:
binding = new PackageBinding(subPkgCompoundName, parent, this.environment, this);
} else if (considerRequiredModules) {
// visible but foreign (when current is unnamed or auto):
for (char[] declaringModuleName : declaringModuleNames) {
ModuleBinding declaringModule = this.environment.root.getModule(declaringModuleName);
if (declaringModule != null) {
if (declaringModule.isPackageLookupActive) {
packageMayBeIncomplete = true;
} else {
PackageBinding declaredPackage = declaringModule.getDeclaredPackage(parentName, name);
if (declaredPackage != null) {
// don't add foreign package to 'parent' (below), but to its own parent:
if (declaredPackage.parent != null)
declaredPackage.parent.addPackage(declaredPackage, declaringModule, true);
parent = null;
//
binding = SplitPackageBinding.combine(declaredPackage, binding, this);
}
}
}
}
}
}
} else {
if (this.environment.nameEnvironment.isPackage(parentName, name))
binding = new PackageBinding(subPkgCompoundName, parent, this.environment, this);
}
// enrich with split-siblings from visible modules:
if (!isUnnamed() && considerRequiredModules) {
binding = combineWithPackagesFromRequired(binding, subPkgCompoundName);
}
if (binding == null || !binding.isValidBinding()) {
if (parent != null && !packageMayBeIncomplete) // don't remember package that may still lack some siblings
parent.knownPackages.put(name, binding == null ? LookupEnvironment.TheNotFoundPackage : binding);
return null;
}
// remember
if (parentName.length == 0)
binding.environment.knownPackages.put(name, binding);
else if (parent != null)
binding = parent.addPackage(binding, this, false);
return addPackage(binding, false);
}
/**
* Answer the package of the given qualified name and visible in this module,
* or {@code null} if no such package exists.
* Accessibility (based on package exports) is not checked.
*
* May answer a {@link SplitPackageBinding}.
*
*/
public PackageBinding getVisiblePackage(char[][] qualifiedPackageName) {
if (qualifiedPackageName == null || qualifiedPackageName.length == 0) {
return this.environment.defaultPackage;
}
PackageBinding parent = getTopLevelPackage(qualifiedPackageName[0]);
if (parent == null || parent == LookupEnvironment.TheNotFoundPackage)
return null;
// check each sub package
for (int i = 1; i < qualifiedPackageName.length; i++) {
PackageBinding binding = getVisiblePackage(parent, qualifiedPackageName[i], true);
if (binding == null || binding == LookupEnvironment.TheNotFoundPackage) {
return null;
}
parent = binding;
}
return parent;
}
/**
* Answer a package, that is a member named packageName of the parent package
* named parentPackageName.
* Considers all packages that are visible to the current module,
* i.e., we consider locally declared packages and packages in all modules
* read by the current module.
* Accessibility (via package exports) is not checked.
*/
public PackageBinding getPackage(char[][] parentPackageName, char[] packageName) {
// Returns a package binding if there exists such a package in the context of this module and it is observable
// A package is observable if it is declared in this module or it is exported by some required module
if (parentPackageName == null || parentPackageName.length == 0) {
return getVisiblePackage(null, packageName, true);
}
PackageBinding binding = null;
PackageBinding parent = getVisiblePackage(parentPackageName);
if (parent != null && parent != LookupEnvironment.TheNotFoundPackage) {
binding = getVisiblePackage(parent, packageName, true);
}
if (binding != null)
return addPackage(binding, false);
return null;
}
/**
* Check if the given package is declared in this module,
* and if so, remember this fact for later.
* The package can be a {@code SplitPackageBinding} in which case
* only one of its incarnations needs to be declared in this module.
* @param packageBinding the package to add
* @param checkForSplit if true then we should try to construct a split package from
* same named packages in required modules.
* @return the given package, possibly enriched to a {@link SplitPackageBinding}
*/
PackageBinding addPackage(PackageBinding packageBinding, boolean checkForSplit) {
if (packageBinding.isDeclaredIn(this)) {
char[] packageName = packageBinding.readableName();
if (checkForSplit && this.environment.useModuleSystem) {
if (isUnnamed()) {
IModuleAwareNameEnvironment moduleEnv = (IModuleAwareNameEnvironment) this.environment.nameEnvironment;
char[][] declaringModuleNames = moduleEnv.getModulesDeclaringPackage(null, packageName, ANY);
if (declaringModuleNames != null) {
for (int i = 0; i < declaringModuleNames.length; i++) {
ModuleBinding otherModule = this.environment.getModule(declaringModuleNames[i]);
if (otherModule != null && !otherModule.isPackageLookupActive)
packageBinding = SplitPackageBinding.combine(otherModule.getVisiblePackage(packageBinding.compoundName), packageBinding, this);
}
}
} else {
packageBinding = combineWithPackagesFromRequired(packageBinding, packageBinding.compoundName);
}
}
this.declaredPackages.put(packageName, packageBinding);
if (packageBinding.parent == null) {
this.environment.knownPackages.put(packageName, packageBinding);
}
}
return packageBinding;
}
private PackageBinding combineWithPackagesFromRequired(PackageBinding currentBinding, char[][] compoundName) {
boolean save = this.isPackageLookupActive;
this.isPackageLookupActive = true;
try {
for (ModuleBinding moduleBinding : getAllRequiredModules())
if (!moduleBinding.isPackageLookupActive)
currentBinding = SplitPackageBinding.combine(moduleBinding.getVisiblePackage(compoundName), currentBinding, this);
return currentBinding;
} finally {
this.isPackageLookupActive = save;
}
}
/**
* Check if the given package is accessible by this module. True when the package is declared in
* this module or exported by some required module to this module.
* See {@link #isPackageExportedTo(PackageBinding, ModuleBinding)}
*
* @param pkg
*
* @return True, if the package is accessible by this module, false otherwise
*/
public boolean canAccess(PackageBinding pkg) {
if (pkg.isDeclaredIn(this))
return true;
for (ModuleBinding requiredModule : getAllRequiredModules()) {
// If pkg is a SplitPackageBinding, we actually ask the intersection of all required modules
// and modules declaring the package, if any of them exports the package to this module.
// The intersection is computed when inside isPackageExportedTo we ask for pkg's incarnation in requiredModule.
if (requiredModule.isPackageExportedTo(pkg, ModuleBinding.this))
return true;
// TODO(SHMOD): store export status in the PackageBinding?
}
return false;
}
@Override
public char[] computeUniqueKey(boolean isLeaf) {
return CharOperation.prepend('"', this.moduleName);
}
@Override
public int kind() {
//
return Binding.MODULE;
}
@Override
public char[] readableName() {
return this.moduleName;
}
@Override
public String toString() {
StringBuffer buffer = new StringBuffer(30);
if (isOpen())
buffer.append("open "); //$NON-NLS-1$
buffer.append("module " + new String(readableName())); //$NON-NLS-1$
if (this.requires.length > 0) {
buffer.append("\n/* requires */\n"); //$NON-NLS-1$
for (int i = 0; i < this.requires.length; i++) {
buffer.append("\n\t"); //$NON-NLS-1$
if (this.requiresTransitive != null) {
for (ModuleBinding reqTrans : this.requiresTransitive) {
if (reqTrans == this.requires[i]) {
buffer.append("transitive "); //$NON-NLS-1$
break;
}
}
}
buffer.append(this.requires[i].moduleName);
}
} else {
buffer.append("\nNo Requires"); //$NON-NLS-1$
}
if (this.exportedPackages != null && this.exportedPackages.length > 0) {
buffer.append("\n/* exports */\n"); //$NON-NLS-1$
for (int i = 0; i < this.exportedPackages.length; i++) {
PackageBinding export = this.exportedPackages[i];
buffer.append("\n\t"); //$NON-NLS-1$
if (export == null) {
buffer.append(""); //$NON-NLS-1$
continue;
}
buffer.append(export.readableName());
SimpleSetOfCharArray restrictions = this.exportRestrictions != null ? this.exportRestrictions.get(export) : null;
if (restrictions != null) {
buffer.append(" to "); //$NON-NLS-1$
String sep = ""; //$NON-NLS-1$
char[][] allNames = new char[restrictions.elementSize][];
restrictions.asArray(allNames);
for (char[] targetModule : allNames) {
buffer.append(sep);
buffer.append(targetModule);
sep = ", "; //$NON-NLS-1$
}
}
}
} else {
buffer.append("\nNo Exports"); //$NON-NLS-1$
}
if (this.openedPackages != null && this.openedPackages.length > 0) {
buffer.append("\n/* exports */\n"); //$NON-NLS-1$
for (int i = 0; i < this.openedPackages.length; i++) {
PackageBinding opens = this.openedPackages[i];
buffer.append("\n\t"); //$NON-NLS-1$
if (opens == null) {
buffer.append(""); //$NON-NLS-1$
continue;
}
buffer.append(opens.readableName());
SimpleSetOfCharArray restrictions = this.openRestrictions != null ? this.openRestrictions.get(opens) : null;
if (restrictions != null) {
buffer.append(" to "); //$NON-NLS-1$
String sep = ""; //$NON-NLS-1$
char[][] allNames = new char[restrictions.elementSize][];
restrictions.asArray(allNames);
for (char[] targetModule : allNames) {
buffer.append(sep);
buffer.append(targetModule);
sep = ", "; //$NON-NLS-1$
}
}
}
} else {
buffer.append("\nNo Opens"); //$NON-NLS-1$
}
if (this.uses != null && this.uses.length > 0) {
buffer.append("\n/* uses /*\n"); //$NON-NLS-1$
for (int i = 0; i < this.uses.length; i++) {
buffer.append("\n\t"); //$NON-NLS-1$
buffer.append(this.uses[i].debugName());
}
} else {
buffer.append("\nNo Uses"); //$NON-NLS-1$
}
if (this.services != null && this.services.length > 0) {
buffer.append("\n/* Services */\n"); //$NON-NLS-1$
for (int i = 0; i < this.services.length; i++) {
buffer.append("\n\t"); //$NON-NLS-1$
buffer.append("provides "); //$NON-NLS-1$
buffer.append(this.services[i].debugName());
buffer.append(" with "); //$NON-NLS-1$
if (this.implementations != null && this.implementations.containsKey(this.services[i])) {
String sep = ""; //$NON-NLS-1$
for (TypeBinding impl : this.implementations.get(this.services[i])) {
buffer.append(sep).append(impl.debugName());
sep = ", "; //$NON-NLS-1$
}
} else {
buffer.append(""); //$NON-NLS-1$
}
}
} else {
buffer.append("\nNo Services"); //$NON-NLS-1$
}
return buffer.toString();
}
public boolean isUnnamed() {
return false;
}
public boolean isOpen() {
return (this.modifiers & ClassFileConstants.ACC_OPEN) != 0;
}
public boolean isDeprecated() {
return (this.tagBits & TagBits.AnnotationDeprecated) != 0;
}
public boolean hasUnstableAutoName() {
return false;
}
public boolean isTransitivelyRequired(ModuleBinding otherModule) {
if (this.transitiveRequires == null) {
Set transitiveDeps = new HashSet<>();
collectTransitiveDependencies(transitiveDeps);
this.transitiveRequires = transitiveDeps;
}
return this.transitiveRequires.contains(otherModule);
}
public int getDefaultNullness() {
getAnnotationTagBits(); // ensure annotations are initialized
return this.defaultNullness;
}
SimpleLookupTable storedAnnotations(boolean forceInitialize, boolean forceStore) {
if (forceInitialize && this.storedAnnotations == null) {
if (!this.environment.globalOptions.storeAnnotations && !forceStore)
return null; // not supported during this compile
this.storedAnnotations = new SimpleLookupTable(3);
}
return this.storedAnnotations;
}
public AnnotationHolder retrieveAnnotationHolder(Binding binding, boolean forceInitialization) {
SimpleLookupTable store = storedAnnotations(forceInitialization, false);
return store == null ? null : (AnnotationHolder) store.get(binding);
}
AnnotationBinding[] retrieveAnnotations(Binding binding) {
AnnotationHolder holder = retrieveAnnotationHolder(binding, true);
return holder == null ? Binding.NO_ANNOTATIONS : holder.getAnnotations();
}
@Override
public void setAnnotations(AnnotationBinding[] annotations, boolean forceStore) {
storeAnnotations(this, annotations, forceStore);
}
void storeAnnotationHolder(Binding binding, AnnotationHolder holder) {
if (holder == null) {
SimpleLookupTable store = storedAnnotations(false, false);
if (store != null)
store.removeKey(binding);
} else {
SimpleLookupTable store = storedAnnotations(true, false);
if (store != null)
store.put(binding, holder);
}
}
void storeAnnotations(Binding binding, AnnotationBinding[] annotations, boolean forceStore) {
AnnotationHolder holder = null;
if (annotations == null || annotations.length == 0) {
SimpleLookupTable store = storedAnnotations(false, forceStore);
if (store != null)
holder = (AnnotationHolder) store.get(binding);
if (holder == null) return; // nothing to delete
} else {
SimpleLookupTable store = storedAnnotations(true, forceStore);
if (store == null) return; // not supported
holder = (AnnotationHolder) store.get(binding);
if (holder == null)
holder = new AnnotationHolder();
}
storeAnnotationHolder(binding, holder.setAnnotations(annotations));
}
}