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package io.github.dmlloyd.classfile.attribute;
import io.github.dmlloyd.classfile.Attribute;
import io.github.dmlloyd.classfile.ClassElement;
import io.github.dmlloyd.classfile.constantpool.ClassEntry;
import io.github.dmlloyd.classfile.constantpool.ModuleEntry;
import io.github.dmlloyd.classfile.constantpool.Utf8Entry;
import java.lang.constant.ClassDesc;
import io.github.dmlloyd.classfile.extras.constant.ModuleDesc;
import io.github.dmlloyd.classfile.extras.constant.PackageDesc;
import io.github.dmlloyd.classfile.extras.reflect.AccessFlag;
import java.util.Collection;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.function.Consumer;
import io.github.dmlloyd.classfile.impl.BoundAttribute;
import io.github.dmlloyd.classfile.impl.ModuleAttributeBuilderImpl;
import io.github.dmlloyd.classfile.impl.UnboundAttribute;
import io.github.dmlloyd.classfile.impl.Util;
/**
* Models the {@code Module} attribute (JVMS {@jvms 4.7.25}), which can
* appear on classes that represent module descriptors.
* Delivered as a {@link io.github.dmlloyd.classfile.ClassElement} when
* traversing the elements of a {@link io.github.dmlloyd.classfile.ClassModel}.
*
* The attribute does not permit multiple instances in a given location.
* Subsequent occurrence of the attribute takes precedence during the attributed
* element build or transformation.
*
* The attribute was introduced in the Java SE Platform version 9.
*
* @since 24
*/
public sealed interface ModuleAttribute
extends Attribute, ClassElement
permits BoundAttribute.BoundModuleAttribute, UnboundAttribute.UnboundModuleAttribute {
/**
* {@return the name of the module}
*/
ModuleEntry moduleName();
/**
* {@return the the module flags of the module, as a bit mask}
*/
int moduleFlagsMask();
/**
* {@return the the module flags of the module, as a set of enum constants}
*/
default Set moduleFlags() {
return AccessFlag.maskToAccessFlags(moduleFlagsMask(), AccessFlag.Location.MODULE);
}
/**
* Tests presence of module flag
* @param flag the module flag
* @return true if the flag is set
*/
default boolean has(AccessFlag flag) {
return Util.has(AccessFlag.Location.MODULE, moduleFlagsMask(), flag);
}
/**
* {@return the version of the module, if present}
*/
Optional moduleVersion();
/**
* {@return the modules required by this module}
*/
List requires();
/**
* {@return the packages exported by this module}
*/
List exports();
/**
* {@return the packages opened by this module}
*/
List opens();
/**
* {@return the services used by this module} Services may be discovered via
* {@link java.util.ServiceLoader}.
*/
List uses();
/**
* {@return the service implementations provided by this module}
*/
List provides();
/**
* {@return a {@code Module} attribute}
*
* @param moduleName the module name
* @param moduleFlags the module flags
* @param moduleVersion the module version
* @param requires the required packages
* @param exports the exported packages
* @param opens the opened packages
* @param uses the consumed services
* @param provides the provided services
*/
static ModuleAttribute of(ModuleEntry moduleName, int moduleFlags,
Utf8Entry moduleVersion,
Collection requires,
Collection exports,
Collection opens,
Collection uses,
Collection provides) {
return new UnboundAttribute.UnboundModuleAttribute(moduleName, moduleFlags, moduleVersion, requires, exports, opens, uses, provides);
}
/**
* {@return a {@code Module} attribute}
*
* @param moduleName the module name
* @param attrHandler a handler that receives a {@link ModuleAttributeBuilder}
*/
static ModuleAttribute of(ModuleDesc moduleName,
Consumer attrHandler) {
var mb = new ModuleAttributeBuilderImpl(moduleName);
attrHandler.accept(mb);
return mb.build();
}
/**
* {@return a {@code Module} attribute}
*
* @param moduleName the module name
* @param attrHandler a handler that receives a {@link ModuleAttributeBuilder}
*/
static ModuleAttribute of(ModuleEntry moduleName,
Consumer attrHandler) {
var mb = new ModuleAttributeBuilderImpl(moduleName);
attrHandler.accept(mb);
return mb.build();
}
/**
* A builder for module attributes.
*
* @since 24
*/
public sealed interface ModuleAttributeBuilder
permits ModuleAttributeBuilderImpl {
/**
* Sets the module name
* @param moduleName the module name
* @return this builder
*/
ModuleAttributeBuilder moduleName(ModuleDesc moduleName);
/**
* Sets the module flags
* @param flagsMask the module flags
* @return this builder
*/
ModuleAttributeBuilder moduleFlags(int flagsMask);
/**
* Sets the module flags
* @param moduleFlags the module flags
* @return this builder
*/
default ModuleAttributeBuilder moduleFlags(AccessFlag... moduleFlags) {
return moduleFlags(Util.flagsToBits(AccessFlag.Location.MODULE, moduleFlags));
}
/**
* Sets the module version
* @param version the module version
* @return this builder
*/
ModuleAttributeBuilder moduleVersion(String version);
/**
* Adds module requirement
* @param module the required module
* @param requiresFlagsMask the requires flags
* @param version the required module version
* @return this builder
*/
ModuleAttributeBuilder requires(ModuleDesc module, int requiresFlagsMask, String version);
/**
* Adds module requirement
* @param module the required module
* @param requiresFlags the requires flags
* @param version the required module version
* @return this builder
*/
default ModuleAttributeBuilder requires(ModuleDesc module, Collection requiresFlags, String version) {
return requires(module, Util.flagsToBits(AccessFlag.Location.MODULE_REQUIRES, requiresFlags), version);
}
/**
* Adds module requirement
* @param requires the module require info
* @return this builder
*/
ModuleAttributeBuilder requires(ModuleRequireInfo requires);
/**
* Adds exported package
* @param pkge the exported package
* @param exportsFlagsMask the export flags
* @param exportsToModules the modules to export to
* @return this builder
*/
ModuleAttributeBuilder exports(PackageDesc pkge, int exportsFlagsMask, ModuleDesc... exportsToModules);
/**
* Adds exported package
* @param pkge the exported package
* @param exportsFlags the export flags
* @param exportsToModules the modules to export to
* @return this builder
*/
default ModuleAttributeBuilder exports(PackageDesc pkge, Collection exportsFlags, ModuleDesc... exportsToModules) {
return exports(pkge, Util.flagsToBits(AccessFlag.Location.MODULE_EXPORTS, exportsFlags), exportsToModules);
}
/**
* Adds exported package
* @param exports the module export info
* @return this builder
*/
ModuleAttributeBuilder exports(ModuleExportInfo exports);
/**
* Opens package
* @param pkge the opened package
* @param opensFlagsMask the open package flags
* @param opensToModules the modules to open to
* @return this builder
*/
ModuleAttributeBuilder opens(PackageDesc pkge, int opensFlagsMask, ModuleDesc... opensToModules);
/**
* Opens package
* @param pkge the opened package
* @param opensFlags the open package flags
* @param opensToModules the modules to open to
* @return this builder
*/
default ModuleAttributeBuilder opens(PackageDesc pkge, Collection opensFlags, ModuleDesc... opensToModules) {
return opens(pkge, Util.flagsToBits(AccessFlag.Location.MODULE_OPENS, opensFlags), opensToModules);
}
/**
* Opens package
* @param opens the module open info
* @return this builder
*/
ModuleAttributeBuilder opens(ModuleOpenInfo opens);
/**
* Declares use of a service
* @param service the service class used
* @return this builder
* @throws IllegalArgumentException if {@code service} represents a primitive type
*/
ModuleAttributeBuilder uses(ClassDesc service);
/**
* Declares use of a service
* @param uses the service class used
* @return this builder
*/
ModuleAttributeBuilder uses(ClassEntry uses);
/**
* Declares provision of a service
* @param service the service class provided
* @param implClasses the implementation classes
* @return this builder
* @throws IllegalArgumentException if {@code service} or any of the {@code implClasses} represents a primitive type
*/
ModuleAttributeBuilder provides(ClassDesc service, ClassDesc... implClasses);
/**
* Declares provision of a service
* @param provides the module provides info
* @return this builder
*/
ModuleAttributeBuilder provides(ModuleProvideInfo provides);
}
}