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

Class ExternalAnnotationUtil

java.lang.Object

org.aspectj.org.eclipse.jdt.core.util.ExternalAnnotationUtil

public final class ExternalAnnotationUtil
extends Object

Utilities for accessing and manipulating text files that externally define annotations for a given Java type. Files are assumed to be in ".eea format", a textual representation of annotated signatures of members of a given type.

Since:

3.11

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	ExternalAnnotationUtil.MergeStrategy	Strategy for merging a new signature with an existing (possibly annotated) signature.

Field Summary

Fields

Modifier and Type	Field	Description
static final char	NO_ANNOTATION	Represents absence of a null annotation.
static final char	NONNULL	Representation of a 'nonnull' annotation, independent of the concrete annotation name used in Java sources.
static final char	NULLABLE	Representation of a 'nullable' annotation, independent of the concrete annotation name used in Java sources.

Constructor Summary

Constructors

Constructor	Description
ExternalAnnotationUtil()

Method Summary

Modifier and Type	Method	Description
static void	annotateMember(String typeName, org.eclipse.core.resources.IFile file, String selector, String originalSignature, String annotatedSignature, ExternalAnnotationUtil.MergeStrategy mergeStrategy, org.eclipse.core.runtime.IProgressMonitor monitor)	Update the given external annotation file with details regarding annotations of one specific method or field.
static void	annotateMethodParameterType(String typeName, org.eclipse.core.resources.IFile file, String selector, String originalSignature, String annotatedParameterType, int paramIdx, ExternalAnnotationUtil.MergeStrategy mergeStrategy, org.eclipse.core.runtime.IProgressMonitor monitor)	Update the given external annotation file with details regarding annotations of a parameter type of a given method.
static void	annotateMethodReturnType(String typeName, org.eclipse.core.resources.IFile file, String selector, String originalSignature, String annotatedReturnType, ExternalAnnotationUtil.MergeStrategy mergeStrategy, org.eclipse.core.runtime.IProgressMonitor monitor)	Update the given external annotation file with details regarding annotations of the return type of a given method.
static void	annotateMethodTypeParameter(String typeName, org.eclipse.core.resources.IFile file, String selector, String originalSignature, String annotatedTypeParameter, int rank, ExternalAnnotationUtil.MergeStrategy mergeStrategy, org.eclipse.core.runtime.IProgressMonitor monitor)	Update the given external annotation file with details regarding annotations of a type parameter of a given method.
static String[]	annotateParameterType(String originalSignature, String annotatedType, int paramIdx, ExternalAnnotationUtil.MergeStrategy mergeStrategy)	Apply the specified changes on a parameter within the given signature.
static String[]	annotateReturnType(String originalSignature, String annotatedType, ExternalAnnotationUtil.MergeStrategy mergeStrategy)	Apply the specified changes on the return type of the given signature.
static String[]	annotateType(String originalSignature, String annotatedType, ExternalAnnotationUtil.MergeStrategy mergeStrategy)	Apply the specified changes on the given type.
static String[]	annotateTypeParameter(String originalSignature, String annotatedType, int rank, ExternalAnnotationUtil.MergeStrategy mergeStrategy)	Apply the specified changes on a type parameter within the given signature.
static void	annotateTypeTypeParameter(String typeName, org.eclipse.core.resources.IFile file, String originalSignature, String annotatedTypeParameter, int rank, ExternalAnnotationUtil.MergeStrategy mergeStrategy, org.eclipse.core.runtime.IProgressMonitor monitor)	Update the given external annotation file with details regarding annotations of a type parameter of the type itself.
static String	extractGenericSignature(IMethodBinding methodBinding)	Answer the give method's signature in class file format.
static String	extractGenericTypeParametersSignature(ITypeBinding type)	Answer the signature of all type parameters of this type in class file format.
static String	extractGenericTypeSignature(ITypeBinding type)	Answer the given types's signature in class file format.
static String	getAnnotatedSignature(String typeName, org.eclipse.core.resources.IFile file, String selector, String originalSignature)	Retrieve the annotated signature of a specified member as found in the given external annotation file, if any.
static org.eclipse.core.resources.IFile	getAnnotationFile(IJavaProject project, ITypeBinding type, org.eclipse.core.runtime.IProgressMonitor monitor)	Answer the external annotation file corresponding to the given type as seen from the given project.
static String	insertParameterAnnotation(String methodSignature, int paramIdx, char annotation, ExternalAnnotationUtil.MergeStrategy mergeStrategy)	Insert an encoded annotation into the given methodSignature affecting one of its parameters.
static String	insertReturnAnnotation(String methodSignature, char annotation, ExternalAnnotationUtil.MergeStrategy mergeStrategy)	Insert an encoded annotation into the given methodSignature affecting its return type.

Methods inherited from class java.lang.Object

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

Field Details

NULLABLE

public static final char NULLABLE

Representation of a 'nullable' annotation, independent of the concrete annotation name used in Java sources.

See Also:

• Constant Field Values

NONNULL

public static final char NONNULL

Representation of a 'nonnull' annotation, independent of the concrete annotation name used in Java sources.

See Also:

• Constant Field Values

NO_ANNOTATION

public static final char NO_ANNOTATION

Represents absence of a null annotation. Useful for removing an existing null annotation. This character is used only internally, it is not part of the Eclipse External Annotation file format.

See Also:

• Constant Field Values

Constructor Details

ExternalAnnotationUtil

public ExternalAnnotationUtil()

Method Details

extractGenericSignature

public static String extractGenericSignature(IMethodBinding methodBinding)

Answer the give method's signature in class file format.

Parameters:

methodBinding - binding representing a method

Returns:

a signature in class file format

extractGenericTypeSignature

public static String extractGenericTypeSignature(ITypeBinding type)

Answer the given types's signature in class file format.

Parameters:

type - binding representing a type

Returns:

a signature in class file format

extractGenericTypeParametersSignature

public static String extractGenericTypeParametersSignature(ITypeBinding type)

Answer the signature of all type parameters of this type in class file format.

Parameters:

type - binding representing a type, required to have type parameters

Returns:

a signature in class file format

Since:

3.19

insertReturnAnnotation

public static String insertReturnAnnotation(String methodSignature,
 char annotation,
 ExternalAnnotationUtil.MergeStrategy mergeStrategy)

Insert an encoded annotation into the given methodSignature affecting its return type.

This method is suitable for declaration annotations.

Parameters:

methodSignature - a method signature in class file format

annotation - one of NULLABLE and NONNULL.

mergeStrategy - when passing ExternalAnnotationUtil.MergeStrategy.ADD_ANNOTATIONS this method will refuse to overwrite any existing annotation in the specified location

Returns:

the modified method signature, or the original signature if modification would conflict with the given merge strategy.

Throws:

IllegalArgumentException - if the method signature is malformed or its return type is not a reference type.

insertParameterAnnotation

public static String insertParameterAnnotation(String methodSignature,
 int paramIdx,
 char annotation,
 ExternalAnnotationUtil.MergeStrategy mergeStrategy)

Insert an encoded annotation into the given methodSignature affecting one of its parameters.

This method is suitable for declaration annotations.

Parameters:

methodSignature - a method signature in class file format

paramIdx - 0-based index of the parameter to which the annotation should be attached

annotation - one of NULLABLE and NONNULL.

mergeStrategy - when passing ExternalAnnotationUtil.MergeStrategy.ADD_ANNOTATIONS this method will refuse to overwrite any existing annotation in the specified location

Returns:

the modified method signature, or the original signature if modification would conflict with the given merge strategy.

Throws:

IllegalArgumentException - if the method signature is malformed or its specified parameter type is not a reference type.

getAnnotationFile

public static org.eclipse.core.resources.IFile getAnnotationFile(IJavaProject project,
 ITypeBinding type,
 org.eclipse.core.runtime.IProgressMonitor monitor)
                                                          throws org.eclipse.core.runtime.CoreException

Answer the external annotation file corresponding to the given type as seen from the given project. Note that manipulation of external annotations is only supported for annotation files in the workspace, and only in directory layout, not from zip files.

Parameters:

project - current project that references the given type from a jar file.

type - the type for which external annotations are sought

monitor - progress monitor to be passed through into file operations

Returns:

a file assumed (but not checked) to be in .eea format. The file may not "exist". Can be null if the given type is not contained in a jar file for which an external annotation path has been defined in the context of the given project.

Throws:

org.eclipse.core.runtime.CoreException - Signals a problem in accessing any of the relevant elements: the project, the type, the containing jar file and finally the sought annotation file.

annotateMember

public static void annotateMember(String typeName,
 org.eclipse.core.resources.IFile file,
 String selector,
 String originalSignature,
 String annotatedSignature,
 ExternalAnnotationUtil.MergeStrategy mergeStrategy,
 org.eclipse.core.runtime.IProgressMonitor monitor)
                           throws org.eclipse.core.runtime.CoreException,
IOException

Update the given external annotation file with details regarding annotations of one specific method or field. If the specified member already has external annotations, old and new annotations will be merged, with priorities controlled by the parameter 'mergeStrategy'.

This method is suitable for declaration annotations and type use annotations.

Parameters:

typeName - binary name (slash separated) of the type being annotated

file - a file assumed to be in .eea format, will be created if it doesn't exist.

selector - selector of the method or field

originalSignature - unannotated signature of the member, used for identification

annotatedSignature - new signatures whose annotations should be superimposed on the member

mergeStrategy - controls how old and new signatures should be merged

monitor - progress monitor to be passed through into file operations, or null if no reporting is desired

Throws:

org.eclipse.core.runtime.CoreException - if access to the file fails

IOException - if reading file content fails

annotateTypeTypeParameter

public static void annotateTypeTypeParameter(String typeName,
 org.eclipse.core.resources.IFile file,
 String originalSignature,
 String annotatedTypeParameter,
 int rank,
 ExternalAnnotationUtil.MergeStrategy mergeStrategy,
 org.eclipse.core.runtime.IProgressMonitor monitor)
                                      throws org.eclipse.core.runtime.CoreException,
IOException,
IllegalArgumentException

Update the given external annotation file with details regarding annotations of a type parameter of the type itself. If the type already has external annotations, old and new annotations will be merged, with priorities controlled by the parameter 'mergeStrategy'.

This method is suitable only for type use annotations.

Parameters:

typeName - binary name (slash separated) of the type being annotated

file - a file assumed to be in .eea format, will be created if it doesn't exist.

originalSignature - unannotated signature of all type parameters of the type

annotatedTypeParameter - signature of the new type parameter whose annotations should be superimposed on the method

rank - rank of the type parameter to be annotated

mergeStrategy - controls how old and new signatures should be merged

monitor - progress monitor to be passed through into file operations, or null if no reporting is desired

Throws:

org.eclipse.core.runtime.CoreException - if access to the file fails

IOException - if reading file content fails

IllegalArgumentException - if the annotatedTypeParameter does not structurally match to originalSignature

Since:

3.19

annotateMethodTypeParameter

public static void annotateMethodTypeParameter(String typeName,
 org.eclipse.core.resources.IFile file,
 String selector,
 String originalSignature,
 String annotatedTypeParameter,
 int rank,
 ExternalAnnotationUtil.MergeStrategy mergeStrategy,
 org.eclipse.core.runtime.IProgressMonitor monitor)
                                        throws org.eclipse.core.runtime.CoreException,
IOException,
IllegalArgumentException

Update the given external annotation file with details regarding annotations of a type parameter of a given method. If the specified method already has external annotations, old and new annotations will be merged, with priorities controlled by the parameter 'mergeStrategy'.

This method is suitable only for type use annotations.

Parameters:

typeName - binary name (slash separated) of the type being annotated

file - a file assumed to be in .eea format, will be created if it doesn't exist.

selector - selector of the method

originalSignature - unannotated signature of the member, used for identification

annotatedTypeParameter - signature of the new type parameter whose annotations should be superimposed on the method

rank - rank of the type parameter to be annotated

mergeStrategy - controls how old and new signatures should be merged

monitor - progress monitor to be passed through into file operations, or null if no reporting is desired

Throws:

org.eclipse.core.runtime.CoreException - if access to the file fails

IOException - if reading file content fails

IllegalArgumentException - if the annotatedTypeParameter does not structurally match to originalSignature

Since:

3.19

annotateMethodReturnType

public static void annotateMethodReturnType(String typeName,
 org.eclipse.core.resources.IFile file,
 String selector,
 String originalSignature,
 String annotatedReturnType,
 ExternalAnnotationUtil.MergeStrategy mergeStrategy,
 org.eclipse.core.runtime.IProgressMonitor monitor)
                                     throws org.eclipse.core.runtime.CoreException,
IOException,
IllegalArgumentException

Update the given external annotation file with details regarding annotations of the return type of a given method. If the specified method already has external annotations, old and new annotations will be merged, with priorities controlled by the parameter 'mergeStrategy'.

This method is suitable for declaration annotations and type use annotations.

Parameters:

typeName - binary name (slash separated) of the type being annotated

file - a file assumed to be in .eea format, will be created if it doesn't exist.

selector - selector of the method

originalSignature - unannotated signature of the member, used for identification

annotatedReturnType - signature of the new return type whose annotations should be superimposed on the method

mergeStrategy - controls how old and new signatures should be merged

monitor - progress monitor to be passed through into file operations, or null if no reporting is desired

Throws:

org.eclipse.core.runtime.CoreException - if access to the file fails

IOException - if reading file content fails

IllegalArgumentException - if the annotatedReturnType does not structurally match to originalSignature

annotateMethodParameterType

public static void annotateMethodParameterType(String typeName,
 org.eclipse.core.resources.IFile file,
 String selector,
 String originalSignature,
 String annotatedParameterType,
 int paramIdx,
 ExternalAnnotationUtil.MergeStrategy mergeStrategy,
 org.eclipse.core.runtime.IProgressMonitor monitor)
                                        throws org.eclipse.core.runtime.CoreException,
IOException,
IllegalArgumentException

Update the given external annotation file with details regarding annotations of a parameter type of a given method. If the specified method already has external annotations, old and new annotations will be merged, with priorities controlled by the parameter 'mergeStrategy'.

This method is suitable for declaration annotations and type use annotations.

Parameters:

typeName - binary name (slash separated) of the type being annotated

file - a file assumed to be in .eea format, will be created if it doesn't exist.

selector - selector of the method

originalSignature - unannotated signature of the member, used for identification

annotatedParameterType - signature of the new parameter type whose annotations should be superimposed on the method

paramIdx - 0-based index of the parameter to which the annotation should be attached

mergeStrategy - controls how old and new signatures should be merged

monitor - progress monitor to be passed through into file operations, or null if no reporting is desired

Throws:

org.eclipse.core.runtime.CoreException - if access to the file fails

IOException - if reading file content fails

IllegalArgumentException - if the annotatedParameterType does not structurally match to originalSignature

getAnnotatedSignature

public static String getAnnotatedSignature(String typeName,
 org.eclipse.core.resources.IFile file,
 String selector,
 String originalSignature)

Retrieve the annotated signature of a specified member as found in the given external annotation file, if any.

Parameters:

typeName - fully qualified slash-separated name of the type for which the file defines external annotations

file - a file assumed to be in .eea format, must not be null, but may not exist

selector - name of the member whose annotation we are looking for, or null when annotating the type's type parameters

originalSignature - the unannotated signature by which the member is identified

Returns:

the annotated signature as found in the file, or null.

annotateType

public static String[] annotateType(String originalSignature,
 String annotatedType,
 ExternalAnnotationUtil.MergeStrategy mergeStrategy)

Apply the specified changes on the given type. This method can be used as a dry run without modifying an annotation file.

Parameters:

originalSignature - the original type signature, may be annotated already

annotatedType - a type signature with additional annotations (incl. NO_ANNOTATION).

mergeStrategy - controls how old and new signatures should be merged

Returns:

an array of length four:

• prefix up-to the changed type
• original type
• changed type
• postfix after the changed type (here: empty string)

annotateReturnType

public static String[] annotateReturnType(String originalSignature,
 String annotatedType,
 ExternalAnnotationUtil.MergeStrategy mergeStrategy)

Apply the specified changes on the return type of the given signature. This method can be used as a dry run without modifying an annotation file.

Parameters:

originalSignature - the original full signature, may be annotated already

annotatedType - a type signature with additional annotations (incl. NO_ANNOTATION).

mergeStrategy - controls how old and new signatures should be merged

Returns:

an array of length four:

• prefix up-to the changed type
• original type
• changed type
• postfix after the changed type (here: empty string)

annotateParameterType

public static String[] annotateParameterType(String originalSignature,
 String annotatedType,
 int paramIdx,
 ExternalAnnotationUtil.MergeStrategy mergeStrategy)

Apply the specified changes on a parameter within the given signature. This method can be used as a dry run without modifying an annotation file.

Parameters:

originalSignature - the original full signature, may be annotated already

annotatedType - a type signature with additional annotations (incl. NO_ANNOTATION).

paramIdx - the index of a parameter to annotate

mergeStrategy - controls how old and new signatures should be merged

Returns:

an array of length four:

• prefix up-to the changed type
• original type
• changed type
• postfix after the changed type

annotateTypeParameter

public static String[] annotateTypeParameter(String originalSignature,
 String annotatedType,
 int rank,
 ExternalAnnotationUtil.MergeStrategy mergeStrategy)

Apply the specified changes on a type parameter within the given signature. This method can be used as a dry run without modifying an annotation file.

Parameters:

originalSignature - the original full signature, may be annotated already

annotatedType - a type signature with additional annotations (incl. NO_ANNOTATION).

rank - the index of a type parameter to annotate

mergeStrategy - controls how old and new signatures should be merged

Returns:

an array of length four:

• prefix up-to the changed type
• original type
• changed type
• postfix after the changed type

Since:

3.19