Package org.openrewrite.java.internal.parser

Class TypeTable

java.lang.Object

org.openrewrite.java.internal.parser.TypeTable

All Implemented Interfaces:

org.openrewrite.java.internal.parser.JavaParserClasspathLoader

@Incubating(since="8.44.0")
public class TypeTable
extends Object
implements org.openrewrite.java.internal.parser.JavaParserClasspathLoader

Type tables are written as a TSV file with the following columns:

• groupId
• artifactId
• version
• classAccess
• className
• classSignature
• classSuperclassSignature
• classSuperinterfaceSignatures[]
• access
• memberName
• descriptor
• signature
• parameterNames
• exceptions[]
• elementAnnotations
• parameterAnnotations[]
• typeAnnotations[]
• constantValue

Descriptor and signature are in JVMS 4.3 format. Because these type tables could get fairly large, the format is optimized for fast record access. TSV was chosen over CSV for its simplicity and for the reasons cited here.

There is of course a lot of duplication in the class and GAV columns, but compression cuts down on the disk impact of that and the value is an overall single table representation.

To read a compressed type table file (which is compressed with gzip), the following command can be used: gzcat types.tsv.gz.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	TypeTable.Reader	Reads a type table from the classpath, and writes classes directories to disk for matching artifact names.
static class	TypeTable.Writer

Field Summary

Fields

Modifier and Type	Field	Description
static final String	DEFAULT_RESOURCE_PATH
static final String	VERIFY_CLASS_WRITING	Verifies that the bytecodes written out for the types represented in a type table will not be invalid and therefore rejected by the JVM verifier when used in a compilation step.

Method Summary

Modifier and Type	Method	Description
static @Nullable TypeTable	fromClasspath(org.openrewrite.ExecutionContext ctx, Collection<String> artifactNames)
@Nullable Path	load(String artifactName)
static TypeTable.Writer	newWriter(OutputStream out)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

VERIFY_CLASS_WRITING

public static final String VERIFY_CLASS_WRITING

Verifies that the bytecodes written out for the types represented in a type table will not be invalid and therefore rejected by the JVM verifier when used in a compilation step.

See Also:

• Constant Field Values

DEFAULT_RESOURCE_PATH

public static final String DEFAULT_RESOURCE_PATH

See Also:

• Constant Field Values

Method Details

fromClasspath

public static @Nullable TypeTable fromClasspath(org.openrewrite.ExecutionContext ctx,
 Collection<String> artifactNames)

newWriter

public static TypeTable.Writer newWriter(OutputStream out)

load

public @Nullable Path load(String artifactName)

Specified by:

load in interface org.openrewrite.java.internal.parser.JavaParserClasspathLoader