101 return e.accept(this, p);
102 }
103
104 /**
105 * Visits any program element as if by passing itself to that
106 * element's {@link Element#accept accept} method and passing
107 * {@code null} for the additional parameter. The invocation
108 * {@code v.visit(elem)} is equivalent to {@code elem.accept(v,
109 * null)}.
110 *
111 * @param e the element to visit
112 * @return a visitor-specified result
113 */
114 public final R visit(Element e) {
115 return e.accept(this, null);
116 }
117
118 /**
119 * {@inheritDoc}
120 *
121 * <p> The default implementation of this method in
122 * {@code AbstractElementVisitor6} will always throw
123 * {@code UnknownElementException}.
124 * This behavior is not required of a subclass.
125 *
126 * @param e the element to visit
127 * @param p a visitor-specified parameter
128 * @return a visitor-specified result
129 * @throws UnknownElementException
130 * a visitor implementation may optionally throw this exception
131 */
132 public R visitUnknown(Element e, P p) {
133 throw new UnknownElementException(e, p);
134 }
135
136 /**
137 * Visits a {@code ModuleElement} by calling {@code
138 * visitUnknown}.
139
140 * @param e {@inheritDoc}
141 * @param p {@inheritDoc}
142 * @return the result of {@code visitUnknown}
143 *
144 * @since 9
145 */
146 @Override
147 public R visitModule(ModuleElement e, P p) {
148 return visitUnknown(e, p);
149 }
150 }
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101 return e.accept(this, p);
102 }
103
104 /**
105 * Visits any program element as if by passing itself to that
106 * element's {@link Element#accept accept} method and passing
107 * {@code null} for the additional parameter. The invocation
108 * {@code v.visit(elem)} is equivalent to {@code elem.accept(v,
109 * null)}.
110 *
111 * @param e the element to visit
112 * @return a visitor-specified result
113 */
114 public final R visit(Element e) {
115 return e.accept(this, null);
116 }
117
118 /**
119 * {@inheritDoc}
120 *
121 * @implSpec The default implementation of this method in
122 * {@code AbstractElementVisitor6} will always throw
123 * {@code UnknownElementException}.
124 * This behavior is not required of a subclass.
125 *
126 * @param e {@inheritDoc}
127 * @param p {@inheritDoc}
128 * @return a visitor-specified result
129 * @throws UnknownElementException
130 * a visitor implementation may optionally throw this exception
131 */
132 @Override
133 public R visitUnknown(Element e, P p) {
134 throw new UnknownElementException(e, p);
135 }
136
137 /**
138 * {@inheritDoc}
139 *
140 * @implSpec Visits a {@code ModuleElement} by calling {@code
141 * visitUnknown}.
142 *
143 * @param e {@inheritDoc}
144 * @param p {@inheritDoc}
145 * @return the result of {@code visitUnknown}
146 *
147 * @since 9
148 */
149 @Override
150 public R visitModule(ModuleElement e, P p) {
151 return visitUnknown(e, p);
152 }
153 }
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