polyglot.types
Class ImportTable

java.lang.Object
  polyglot.types.ClassResolver
      polyglot.types.ImportTable

All Implemented Interfaces:

Resolver

public class ImportTable
extends ClassResolver

An ImportTable is a type of ClassResolver that corresponds to a particular source file.

It has a set of package and class imports, which caches the results of lookups for future reference.

Field Summary

protected java.util.List	classImports List of explicitly imported classes added to the table or pending in the lazyImports list.
protected java.util.List	lazyImports List of class imports which will be lazily added to the table at the next lookup.
protected java.util.Map	map Map from names to classes found, or to the NOT_FOUND object.
protected java.util.List	packageImports A list of all package imports.
protected Package	pkg Our package
protected Resolver	resolver The underlying resolver.
protected java.lang.String	sourceName Source name to use for debugging and error reporting
protected Position	sourcePos Position to use for error reporting
protected TypeSystem	ts

Constructor Summary

ImportTable(TypeSystem ts, Resolver base, Package pkg)
Create an import table.

ImportTable(TypeSystem ts, Resolver base, Package pkg, java.lang.String src)
Create an import table.

Method Summary

void	addClassImport(java.lang.String className) Add a class import.
void	addPackageImport(java.lang.String pkgName) Add a package import.
protected Named	cachedFind(java.lang.String name) Find a type by name, using the cache and the outer resolver, but not the import table.
java.util.List	classImports() List the classes explicitly imported.
Named	find(java.lang.String name) Find a type by name, searching the import table.
protected Named	findInPkg(java.lang.String name, java.lang.String pkgName)
protected boolean	isVisibleFrom(Named n, java.lang.String pkgName) Return whether n in package pkgName is visible from within package pkg.
protected void	lazyImport() Load the class imports, lazily.
Package	package_() The package of the source we are importing types into.
java.util.List	packageImports() List the packages we import from.
java.lang.String	sourceName() The name of the source file we are importing into.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

ts

protected TypeSystem ts

resolver

protected Resolver resolver

The underlying resolver.

packageImports

protected java.util.List packageImports

A list of all package imports.

map

protected java.util.Map map

Map from names to classes found, or to the NOT_FOUND object.

lazyImports

protected java.util.List lazyImports

List of class imports which will be lazily added to the table at the next lookup.

classImports

protected java.util.List classImports

List of explicitly imported classes added to the table or pending in the lazyImports list.

sourceName

protected java.lang.String sourceName

Source name to use for debugging and error reporting

sourcePos

protected Position sourcePos

Position to use for error reporting

pkg

protected Package pkg

Our package

Constructor Detail

ImportTable

public ImportTable(TypeSystem ts,
                   Resolver base,
                   Package pkg)

Create an import table.

Parameters:

ts - The type system

base - The outermost resolver to use for looking up types.

pkg - The package of the source we are importing types into.

ImportTable

public ImportTable(TypeSystem ts,
                   Resolver base,
                   Package pkg,
                   java.lang.String src)

Create an import table.

Parameters:

ts - The type system

base - The outermost resolver to use for looking up types.

pkg - The package of the source we are importing types into.

src - The name of the source file we are importing into.

Method Detail

package_

public Package package_()

The package of the source we are importing types into.

addClassImport

public void addClassImport(java.lang.String className)

Add a class import.

addPackageImport

public void addPackageImport(java.lang.String pkgName)

Add a package import.

packageImports

public java.util.List packageImports()

List the packages we import from.

classImports

public java.util.List classImports()

List the classes explicitly imported.

sourceName

public java.lang.String sourceName()

The name of the source file we are importing into.

cachedFind

protected Named cachedFind(java.lang.String name)
                    throws SemanticException

Find a type by name, using the cache and the outer resolver, but not the import table.

Throws:

SemanticException

find

public Named find(java.lang.String name)
           throws SemanticException

Find a type by name, searching the import table.

Specified by:

find in interface Resolver

Specified by:

find in class ClassResolver

Throws:

SemanticException

findInPkg

protected Named findInPkg(java.lang.String name,
                          java.lang.String pkgName)
                   throws SemanticException

Throws:

SemanticException

isVisibleFrom

protected boolean isVisibleFrom(Named n,
                                java.lang.String pkgName)

Return whether n in package pkgName is visible from within package pkg. The empty string may be passed in to represent the default package.

lazyImport

protected void lazyImport()
                   throws SemanticException

Load the class imports, lazily.

Throws:

SemanticException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object