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 * Copyright 2005-2006 Sun Microsystems, Inc.  All Rights Reserved.
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit if you need additional information or
 * have any questions.

package com.sun.source.tree;

 * A visitor of trees, in the style of the visitor design pattern.
 * Classes implementing this interface are used to operate
 * on a tree when the kind of tree is unknown at compile time.
 * When a visitor is passed to an tree's {@link Tree#accept
 * accept} method, the <tt>visit<i>XYZ</i></tt> method most applicable
 * to that tree is invoked.
 * <p> Classes implementing this interface may or may not throw a
 * {@code NullPointerException} if the additional parameter {@code p}
 * is {@code null}; see documentation of the implementing class for
 * details.
 * <p> <b>WARNING:</b> It is possible that methods will be added to
 * this interface to accommodate new, currently unknown, language
 * structures added to future versions of the Java&trade; programming
 * language.  Therefore, visitor classes directly implementing this
 * interface may be source incompatible with future versions of the
 * platform.
 * @param <R> the return type of this visitor's methods.  Use {@link
 *         Void} for visitors that do not need to return results.
 * @param <P> the type of the additional parameter to this visitor's
 *            methods.  Use {@code Void} for visitors that do not need an
 *            additional parameter.
 * @author Peter von der Ah&eacute;
 * @author Jonathan Gibbons
 * @since 1.6
public interface TreeVisitor<R,P> {
    R visitAnnotation(AnnotationTree node, P p);
    R visitMethodInvocation(MethodInvocationTree node, P p);
    R visitAssert(AssertTree node, P p);
    R visitAssignment(AssignmentTree node, P p);
    R visitCompoundAssignment(CompoundAssignmentTree node, P p);
    R visitBinary(BinaryTree node, P p);
    R visitBlock(BlockTree node, P p);
    R visitBreak(BreakTree node, P p);
    R visitCase(CaseTree node, P p);
    R visitCatch(CatchTree node, P p);
    R visitClass(ClassTree node, P p);
    R visitConditionalExpression(ConditionalExpressionTree node, P p);
    R visitContinue(ContinueTree node, P p);
    R visitDoWhileLoop(DoWhileLoopTree node, P p);
    R visitErroneous(ErroneousTree node, P p);
    R visitExpressionStatement(ExpressionStatementTree node, P p);
    R visitEnhancedForLoop(EnhancedForLoopTree node, P p);
    R visitForLoop(ForLoopTree node, P p);
    R visitIdentifier(IdentifierTree node, P p);
    R visitIf(IfTree node, P p);
    R visitImport(ImportTree node, P p);
    R visitArrayAccess(ArrayAccessTree node, P p);
    R visitLabeledStatement(LabeledStatementTree node, P p);
    R visitLiteral(LiteralTree node, P p);
    R visitMethod(MethodTree node, P p);
    R visitModifiers(ModifiersTree node, P p);
    R visitNewArray(NewArrayTree node, P p);
    R visitNewClass(NewClassTree node, P p);
    R visitParenthesized(ParenthesizedTree node, P p);
    R visitReturn(ReturnTree node, P p);
    R visitMemberSelect(MemberSelectTree node, P p);
    R visitEmptyStatement(EmptyStatementTree node, P p);
    R visitSwitch(SwitchTree node, P p);
    R visitSynchronized(SynchronizedTree node, P p);
    R visitThrow(ThrowTree node, P p);
    R visitCompilationUnit(CompilationUnitTree node, P p);
    R visitTry(TryTree node, P p);
    R visitParameterizedType(ParameterizedTypeTree node, P p);
    R visitArrayType(ArrayTypeTree node, P p);
    R visitTypeCast(TypeCastTree node, P p);
    R visitPrimitiveType(PrimitiveTypeTree node, P p);
    R visitTypeParameter(TypeParameterTree node, P p);
    R visitInstanceOf(InstanceOfTree node, P p);
    R visitUnary(UnaryTree node, P p);
    R visitVariable(VariableTree node, P p);
    R visitWhileLoop(WhileLoopTree node, P p);
    R visitWildcard(WildcardTree node, P p);
    R visitOther(Tree node, P p);
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