Package org.aspectj.org.eclipse.jdt.core

Interface IAccessRule

All Known Implementing Classes:

ClasspathAccessRule

public interface IAccessRule

Describes an access rule to source and class files on a classpath entry. An access rule is composed of a file pattern and a kind (accessible, non accessible, or discouraged).

On a given classpath entry, the access rules are considered in the order given when the entry was created. When a source or class file matches an access rule's pattern, the access rule's kind defines whether the file is considered accessible, non-accessible, or whether its access is discouraged. If the source or class file doesn't match any access rule, it is considered accessible. A source or class file that is not accessible or discouraged can still be referred to, but it is tagged as being not accessible - the Java builder will create a problem marker, for example. The severity of the marker created from a non-accessible rule is controlled through the JavaCore.COMPILER_PB_FORBIDDEN_REFERENCE compiler option. The severity of the marker created from a discouraged rule is controlled through the JavaCore.COMPILER_PB_DISCOURAGED_REFERENCE compiler option. Note this is different from inclusion and exclusion patterns on source classpath entries, where a source file that is excluded is not even compiled.

Files patterns look like relative file paths with wildcards and are interpreted relative to each entry's path. File patterns are case-sensitive and they can contain '**', '*' or '?' wildcards (see IClasspathEntry.getExclusionPatterns() for the full description of their syntax and semantics). Note that file patterns must not include the file extension. com/xyz/tests/MyClass is a valid file pattern, whereas com/xyz/tests/MyClass.class is not valid.

For example, if a classpath entry path is /Project/someLib.jar, there are no accessible rules, and there is one non-accessible rule with pattern com/xyz/tests/**, then class files like /Project/someLib.jar/com/xyz/Foo.class and /Project/someLib.jar/com/xyz/utils/Bar.class would be accessible, whereas /Project/someLib.jar/com/xyz/tests/T1.class and /Project/someLib.jar/com/xyz/tests/quick/T2.class would not be accessible.

Since:

3.1

See Also:

• JavaCore.newAccessRule(IPath, int)
• IClasspathEntry.getExclusionPatterns()

Field Summary

Fields

Modifier and Type	Field	Description
static final int	IGNORE_IF_BETTER	Flag indicating that whether a type matching this rule should be ignored iff a type with the same qualified name can be found on a later classpath entry with a better accessibility.
static final int	K_ACCESSIBLE	Constant indicating that files matching the rule's pattern are accessible.
static final int	K_DISCOURAGED	Constant indicating that access to the files matching the rule's pattern is discouraged.
static final int	K_NON_ACCESSIBLE	Constant indicating that files matching the rule's pattern are non-accessible.

Method Summary

Modifier and Type	Method	Description
int	getKind()	Returns the kind of this access rule (one of K_ACCESSIBLE, K_NON_ACCESSIBLE or K_DISCOURAGED).
org.eclipse.core.runtime.IPath	getPattern()	Returns the file pattern for this access rule.
boolean	ignoreIfBetter()	Returns whether a type matching this rule should be ignored iff a type with the same qualified name can be found on a later classpath entry with a better accessibility.

Field Details

K_ACCESSIBLE

static final int K_ACCESSIBLE

Constant indicating that files matching the rule's pattern are accessible.

See Also:

• Constant Field Values

K_NON_ACCESSIBLE

static final int K_NON_ACCESSIBLE

Constant indicating that files matching the rule's pattern are non-accessible.

See Also:

• Constant Field Values

K_DISCOURAGED

static final int K_DISCOURAGED

Constant indicating that access to the files matching the rule's pattern is discouraged.

See Also:

• Constant Field Values

IGNORE_IF_BETTER

static final int IGNORE_IF_BETTER

Flag indicating that whether a type matching this rule should be ignored iff a type with the same qualified name can be found on a later classpath entry with a better accessibility.

E.g. if a type p.X matches a rule K_NON_ACCESSIBLE | IGNORE_IF_BETTER on a library entry 'lib1' and another type p.X also matches a rule K_DISCOURAGED on library entry 'lib2' ('lib2' being after 'lib1' on the classpath), then p.X from 'lib2' will be used and reported as discouraged.

Since:

3.2

See Also:

• Constant Field Values

Method Details

getPattern

org.eclipse.core.runtime.IPath getPattern()

Returns the file pattern for this access rule.

Returns:

the file pattern for this access rule

See Also:

• IClasspathEntry.getExclusionPatterns()

getKind

int getKind()

Returns the kind of this access rule (one of K_ACCESSIBLE, K_NON_ACCESSIBLE or K_DISCOURAGED).

Returns:

the kind of this access rule

ignoreIfBetter

boolean ignoreIfBetter()

Returns whether a type matching this rule should be ignored iff a type with the same qualified name can be found on a later classpath entry with a better accessibility.

E.g. if a type p.X matches a rule K_NON_ACCESSIBLE | IGNORE_IF_BETTER on a library entry 'lib1' and another type p.X also matches a rule K_DISCOURAGED on library entry 'lib2' ('lib2' being after 'lib1' on the classpath), then p.X from 'lib2' will be used and reported as discouraged.

Returns:

whether a type matching this rule should be ignored iff a type with the same qualified name can be found on a later classpath entry with a better accessibility

Since:

3.2