/*
* Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
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*/
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™ 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 Ahé
* @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);
}