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jdk.internal.module

public final Class ModuleInfo

Read module information from a module-info class file.

Implementation Note

The rationale for the hand-coded reader is startup performance and fine control over the throwing of InvalidModuleDescriptorException.

Nested and Inner Type Summary

Modifier and Type	Class and Description
public static class	ModuleInfo.Attributes A holder class for the ModuleDescriptor that is created by reading the Module and other standard class file attributes.
private static class	ModuleInfo.ConstantPool The constant pool in a class file.
private static class	ModuleInfo.CountingDataInput A DataInput implementation that reads from another DataInput and counts the number of bytes read.
private static class	ModuleInfo.DataInputWrapper A DataInput implementation that reads from a ByteBuffer.

Field Summary

Modifier and Type	Field and Description
private static final JavaLangModuleAccess	JLMA
private final Supplier<Set<String>>	packageFinder
private final boolean	parseHashes
private static volatile Set<String>	predefinedNotAllowed

Constructor Summary

Access	Constructor and Description
private	ModuleInfo(Supplier<Set<String>> pf, boolean ph)
private	ModuleInfo(Supplier<Set<String>> pf)

Method Summary

Modifier and Type	Method and Description
private ModuleInfo.Attributes	doRead(DataInput input) Reads the input as a module-info class file.
private static InvalidModuleDescriptorException	invalidModuleDescriptor(String msg) Returns an InvalidModuleDescriptorException with the given detail message
private static boolean	isAttributeAtMostOnce(String name) Returns true if the given attribute can be present at most once in the class file.
private static boolean	isAttributeDisallowed(String name) Return true if the given attribute name is the name of a pre-defined attribute in JVMS 4.7 that is not allowed in a module-info class.
public static ModuleInfo.Attributes	read(InputStream in, Supplier<Set<String>> pf) Reads a `module-info.class` from the given input stream.
public static ModuleInfo.Attributes	read(ByteBuffer bb, Supplier<Set<String>> pf) Reads a `module-info.class` from the given byte buffer.
public static ModuleInfo.Attributes	readIgnoringHashes(ByteBuffer bb, Supplier<Set<String>> pf) Reads a `module-info.class` from the given byte buffer but ignore the `ModuleHashes` attribute.
private ModuleDescriptor.Builder	readModuleAttribute(DataInput in, ModuleInfo.ConstantPool cpool, int major, boolean isPreview) Reads the Module attribute, returning the ModuleDescriptor.Builder to build the corresponding ModuleDescriptor.
private ModuleHashes	readModuleHashesAttribute(DataInput in, ModuleInfo.ConstantPool cpool) Reads the ModuleHashes attribute
private String	readModuleMainClassAttribute(DataInput in, ModuleInfo.ConstantPool cpool) Reads the ModuleMainClass attribute
private Set<String>	readModulePackagesAttribute(DataInput in, ModuleInfo.ConstantPool cpool) Reads the ModulePackages attribute
private ModuleResolution	readModuleResolution(DataInput in, ModuleInfo.ConstantPool cpool) Reads the ModuleResolution attribute.
private ModuleTarget	readModuleTargetAttribute(DataInput in, ModuleInfo.ConstantPool cpool) Reads the ModuleTarget attribute
private static InvalidModuleDescriptorException	truncatedModuleDescriptor() Returns an InvalidModuleDescriptorException with a detail message to indicate that the class file is truncated.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait