62 * @since 1.6
63 */
64 public class ElementFilter {
65 private ElementFilter() {} // Do not instantiate.
66
67 private static final Set<ElementKind> CONSTRUCTOR_KIND =
68 Collections.unmodifiableSet(EnumSet.of(ElementKind.CONSTRUCTOR));
69
70 private static final Set<ElementKind> FIELD_KINDS =
71 Collections.unmodifiableSet(EnumSet.of(ElementKind.FIELD,
72 ElementKind.ENUM_CONSTANT));
73 private static final Set<ElementKind> METHOD_KIND =
74 Collections.unmodifiableSet(EnumSet.of(ElementKind.METHOD));
75
76 private static final Set<ElementKind> PACKAGE_KIND =
77 Collections.unmodifiableSet(EnumSet.of(ElementKind.PACKAGE));
78
79 private static final Set<ElementKind> MODULE_KIND =
80 Collections.unmodifiableSet(EnumSet.of(ElementKind.MODULE));
81
82 @SuppressWarnings("removal")
83 private static final Set<ElementKind> TYPE_KINDS =
84 Collections.unmodifiableSet(EnumSet.of(ElementKind.CLASS,
85 ElementKind.ENUM,
86 ElementKind.INTERFACE,
87 ElementKind.RECORD,
88 ElementKind.ANNOTATION_TYPE));
89
90 @SuppressWarnings("removal")
91 private static final Set<ElementKind> RECORD_COMPONENT_KIND =
92 Set.of(ElementKind.RECORD_COMPONENT);
93
94 /**
95 * Returns a list of fields in {@code elements}.
96 * @return a list of fields in {@code elements}
97 * @param elements the elements to filter
98 */
99 public static List<VariableElement>
100 fieldsIn(Iterable<? extends Element> elements) {
101 return listFilter(elements, FIELD_KINDS, VariableElement.class);
102 }
103
104 /**
105 * Returns a set of fields in {@code elements}.
106 * @return a set of fields in {@code elements}
107 * @param elements the elements to filter
108 */
109 public static Set<VariableElement>
110 fieldsIn(Set<? extends Element> elements) {
111 return setFilter(elements, FIELD_KINDS, VariableElement.class);
112 }
113
114 /**
115 * Returns a list of record components in {@code elements}.
116 * @return a list of record components in {@code elements}
117 * @param elements the elements to filter
118 * @since 14
119 * @deprecated This method is part of a preview feature and may be removed
120 * if the preview feature is removed.
121 */
122 @Deprecated(forRemoval=true, since="14")
123 @SuppressWarnings("removal")
124 public static List<RecordComponentElement>
125 recordComponentsIn(Iterable<? extends Element> elements) {
126 return listFilter(elements, RECORD_COMPONENT_KIND, RecordComponentElement.class);
127 }
128
129 /**
130 * Returns a set of record components in {@code elements}.
131 * @return a set of record components in {@code elements}
132 * @param elements the elements to filter
133 * @since 14
134 * @deprecated This method is part of a preview feature and may be removed
135 * if the preview feature is removed.
136 */
137 @Deprecated(forRemoval=true, since="14")
138 @SuppressWarnings("removal")
139 public static Set<RecordComponentElement>
140 recordComponentsIn(Set<? extends Element> elements) {
141 return setFilter(elements, RECORD_COMPONENT_KIND, RecordComponentElement.class);
142 }
143
144 /**
145 * Returns a list of constructors in {@code elements}.
146 * @return a list of constructors in {@code elements}
147 * @param elements the elements to filter
148 */
149 public static List<ExecutableElement>
150 constructorsIn(Iterable<? extends Element> elements) {
151 return listFilter(elements, CONSTRUCTOR_KIND, ExecutableElement.class);
152 }
153
154 /**
155 * Returns a set of constructors in {@code elements}.
156 * @return a set of constructors in {@code elements}
157 * @param elements the elements to filter
158 */
|
62 * @since 1.6
63 */
64 public class ElementFilter {
65 private ElementFilter() {} // Do not instantiate.
66
67 private static final Set<ElementKind> CONSTRUCTOR_KIND =
68 Collections.unmodifiableSet(EnumSet.of(ElementKind.CONSTRUCTOR));
69
70 private static final Set<ElementKind> FIELD_KINDS =
71 Collections.unmodifiableSet(EnumSet.of(ElementKind.FIELD,
72 ElementKind.ENUM_CONSTANT));
73 private static final Set<ElementKind> METHOD_KIND =
74 Collections.unmodifiableSet(EnumSet.of(ElementKind.METHOD));
75
76 private static final Set<ElementKind> PACKAGE_KIND =
77 Collections.unmodifiableSet(EnumSet.of(ElementKind.PACKAGE));
78
79 private static final Set<ElementKind> MODULE_KIND =
80 Collections.unmodifiableSet(EnumSet.of(ElementKind.MODULE));
81
82 @SuppressWarnings("preview")
83 private static final Set<ElementKind> TYPE_KINDS =
84 Collections.unmodifiableSet(EnumSet.of(ElementKind.CLASS,
85 ElementKind.ENUM,
86 ElementKind.INTERFACE,
87 ElementKind.RECORD,
88 ElementKind.ANNOTATION_TYPE));
89
90 @SuppressWarnings("preview")
91 private static final Set<ElementKind> RECORD_COMPONENT_KIND =
92 Set.of(ElementKind.RECORD_COMPONENT);
93
94 /**
95 * Returns a list of fields in {@code elements}.
96 * @return a list of fields in {@code elements}
97 * @param elements the elements to filter
98 */
99 public static List<VariableElement>
100 fieldsIn(Iterable<? extends Element> elements) {
101 return listFilter(elements, FIELD_KINDS, VariableElement.class);
102 }
103
104 /**
105 * Returns a set of fields in {@code elements}.
106 * @return a set of fields in {@code elements}
107 * @param elements the elements to filter
108 */
109 public static Set<VariableElement>
110 fieldsIn(Set<? extends Element> elements) {
111 return setFilter(elements, FIELD_KINDS, VariableElement.class);
112 }
113
114 /**
115 * {@preview Associated with records, a preview feature of the Java language.
116 *
117 * This method is associated with <i>records</i>, a preview
118 * feature of the Java language. Programs can only use this
119 * method when preview features are enabled. Preview features
120 * may be removed in a future release, or upgraded to permanent
121 * features of the Java language.}
122 *
123 * Returns a list of record components in {@code elements}.
124 * @return a list of record components in {@code elements}
125 * @param elements the elements to filter
126 * @since 14
127 */
128 @jdk.internal.PreviewFeature(feature=jdk.internal.PreviewFeature.Feature.RECORDS,
129 essentialAPI=false)
130 @SuppressWarnings("preview")
131 public static List<RecordComponentElement>
132 recordComponentsIn(Iterable<? extends Element> elements) {
133 return listFilter(elements, RECORD_COMPONENT_KIND, RecordComponentElement.class);
134 }
135
136 /**
137 * {@preview Associated with records, a preview feature of the Java language.
138 *
139 * This method is associated with <i>records</i>, a preview
140 * feature of the Java language. Programs can only use this
141 * method when preview features are enabled. Preview features
142 * may be removed in a future release, or upgraded to permanent
143 * features of the Java language.}
144 *
145 * Returns a set of record components in {@code elements}.
146 * @return a set of record components in {@code elements}
147 * @param elements the elements to filter
148 * @since 14
149 */
150 @jdk.internal.PreviewFeature(feature=jdk.internal.PreviewFeature.Feature.RECORDS,
151 essentialAPI=false)
152 @SuppressWarnings("preview")
153 public static Set<RecordComponentElement>
154 recordComponentsIn(Set<? extends Element> elements) {
155 return setFilter(elements, RECORD_COMPONENT_KIND, RecordComponentElement.class);
156 }
157
158 /**
159 * Returns a list of constructors in {@code elements}.
160 * @return a list of constructors in {@code elements}
161 * @param elements the elements to filter
162 */
163 public static List<ExecutableElement>
164 constructorsIn(Iterable<? extends Element> elements) {
165 return listFilter(elements, CONSTRUCTOR_KIND, ExecutableElement.class);
166 }
167
168 /**
169 * Returns a set of constructors in {@code elements}.
170 * @return a set of constructors in {@code elements}
171 * @param elements the elements to filter
172 */
|