org.glassfish.pfl.dynamic.codegen.impl.TreeWalker Maven / Gradle / Ivy
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package org.glassfish.pfl.dynamic.codegen.impl;
import java.util.Map ;
import java.lang.reflect.Modifier ;
import org.glassfish.pfl.dynamic.codegen.spi.Type ;
import org.glassfish.pfl.dynamic.codegen.spi.Expression;
import org.glassfish.pfl.dynamic.codegen.spi.Variable ;
import org.glassfish.pfl.basic.contain.Pair;
/** This is a general purpose utility that does a complete traversal
* of a Node tree. A stack of Visitors is maintained. The current
* Visitor on top of the stack is applied to each node.
* Pre and post methods are provided for each type.
* The default implementations of these methods delegate to the pre
* and post methods of the superclass of the node type, so only the
* required pre and post methods need be overridden.
*
* This is used as follows:
*
* TreeWalkerContext context = new TreeWalkerContext() ;
* Visitor visitor = new SubclassOfTreeWalker( context, ... ) ;
* context.push( visitor ) ;
* node.accept( visitor ) ;
*
* Note that this allows the temporary changing of the current visitor
* while traversing the tree. The fact that the context support mark
* and popMark operations makes it easy to process all of the children
* of a node in any order: just call context.mark() in a preXXX method,
* push appropriate visitors in the intermediate xXXBeforeYYY methods,
* and then call context.popMark in the postXXX method.
*
* Note that all preXXX methods return a boolean which indicates whether
* or not this node should be traversed. If true is return, any
* child nodes are traversed, and the postXXX method is called. If false
* is returned, the visitXXX method completes.
*
* If the preXXX method returns true, the postXXX method is always called.
* If the preXXX method throws an exception or returns false, the
* postXXX method is not called.
*
* The more complex node types also include intermediate control methods
* that can be overridden to affect the traversal.
*
* @author Ken Cavanaugh
*/
public abstract class TreeWalker implements Visitor {
protected final TreeWalkerContext context ;
public TreeWalker( TreeWalkerContext context ) {
this.context = context ;
}
// Node
public boolean preNode( Node arg ) {
return true ;
}
public void postNode( Node arg ) {
}
public void visitNode( Node arg ) {
if (preNode( arg )) {
postNode( arg ) ;
}
}
// FieldGenerator
public boolean preFieldGenerator( FieldGenerator arg ) {
return preNode( arg ) ;
}
public void postFieldGenerator( FieldGenerator arg ) {
}
public final void visitFieldGenerator( FieldGenerator arg ) {
if (preFieldGenerator( arg )) {
postFieldGenerator( arg ) ;
}
}
// ClassGeneratorImpl
public boolean preClassGenerator( ClassGeneratorImpl arg ) {
return preNode( arg ) ;
}
// This allows for simple visitors that always perform the same action
// on a variable. More complex visitors should simply return false
// and handle class variables in preClassGenerator.
public boolean classGeneratorBeforeFields( ClassGeneratorImpl arg ) {
return true ;
}
public void classGeneratorBeforeInitializer( ClassGeneratorImpl arg ) {
}
public void classGeneratorBeforeMethod( ClassGeneratorImpl arg ) {
}
public void classGeneratorBeforeConstructor( ClassGeneratorImpl arg ) {
}
public void postClassGenerator( ClassGeneratorImpl arg ) {
postNode( arg ) ;
}
public void visitClassGenerator( ClassGeneratorImpl arg ) {
if (preClassGenerator( arg )) {
try {
if (!arg.isInterface()) {
// We currently assume that interface have no data members,
// not even static ones.
if (classGeneratorBeforeFields(arg)) {
for (FieldGenerator entry : arg.fields()) {
entry.accept( context.current() ) ;
}
}
if (!arg.initializer().isEmpty()) {
classGeneratorBeforeInitializer( arg ) ;
arg.initializer().accept( context.current() ) ;
}
}
if (!arg.isInterface()) {
for (MethodGenerator mg : arg.constructors() ) {
classGeneratorBeforeConstructor( arg ) ;
mg.accept( context.current() ) ;
}
}
for (MethodGenerator mg : arg.methods() ) {
classGeneratorBeforeMethod( arg ) ;
mg.accept( context.current() ) ;
}
} finally {
postClassGenerator( arg ) ;
}
}
}
// MethodGenerator
public boolean preMethodGenerator( MethodGenerator arg ) {
return preNode( arg ) ;
}
// This allows for simple visitors that always do the same thing for
// variables. More complex visitors should return false here
// and handle the argument variables directly in preMethodGenerator.
public boolean methodGeneratorBeforeArguments( MethodGenerator arg ) {
return true ;
}
// This allows for simple visitors that always do the same thing for
// types. More complex visitors should return false here
// and handle the exception types directly in preMethodGenerator.
public void methodGeneratorAfterArguments( MethodGenerator arg ) {
}
public void postMethodGenerator( MethodGenerator arg ) {
postNode( arg ) ;
}
public void visitMethodGenerator( MethodGenerator arg ) {
if (preMethodGenerator( arg )) {
try {
if (methodGeneratorBeforeArguments( arg )) {
for (Variable var : arg.arguments()) {
((VariableInternal)var).accept( context.current() ) ;
}
}
methodGeneratorAfterArguments( arg ) ;
if (!Modifier.isAbstract(arg.modifiers()))
arg.body().accept( context.current() ) ;
} finally {
postMethodGenerator( arg ) ;
}
}
}
// Statement
public boolean preStatement( Statement arg ) {
return preNode( arg ) ;
}
public void postStatement( Statement arg ) {
postNode( arg ) ;
}
public void visitStatement( Statement arg ) {
if (preStatement( arg )) {
postStatement( arg ) ;
}
}
// ThrowStatement
public boolean preThrowStatement( ThrowStatement arg ) {
return preStatement( arg ) ;
}
public void postThrowStatement( ThrowStatement arg ) {
postStatement( arg ) ;
}
public void visitThrowStatement( ThrowStatement arg ) {
if (preThrowStatement( arg )) {
try {
arg.expr().accept( context.current() ) ;
} finally {
postThrowStatement( arg ) ;
}
}
}
// AssignmentStatement
public boolean preAssignmentStatement( AssignmentStatement arg ) {
return preStatement( arg ) ;
}
public void assignmentStatementBeforeLeftSide( AssignmentStatement arg ) {
}
public void postAssignmentStatement( AssignmentStatement arg ) {
postStatement( arg ) ;
}
public void visitAssignmentStatement( AssignmentStatement arg ) {
if (preAssignmentStatement( arg )) {
try {
arg.right().accept( context.current() ) ;
assignmentStatementBeforeLeftSide( arg ) ;
arg.left().accept( context.current() ) ;
} finally {
postAssignmentStatement( arg ) ;
}
}
}
// BlockStatement
public boolean preBlockStatement( BlockStatement arg ) {
return preStatement( arg ) ;
}
public void blockStatementBeforeBodyStatement( BlockStatement arg, Statement stmt ) {
}
public void postBlockStatement( BlockStatement arg ) {
postStatement( arg ) ;
}
public void visitBlockStatement( BlockStatement arg ) {
if (preBlockStatement( arg )) {
try {
for (Statement stmt : arg.body()) {
blockStatementBeforeBodyStatement( arg, stmt ) ;
stmt.accept( context.current() ) ;
}
} finally {
postBlockStatement( arg ) ;
}
}
}
// CaseBranch
public boolean preCaseBranch( CaseBranch arg ) {
return preBlockStatement( arg ) ;
}
public void caseBranchBeforeBodyStatement( CaseBranch arg ) {
}
public void postCaseBranch( CaseBranch arg ) {
postBlockStatement( arg ) ;
}
public void visitCaseBranch( CaseBranch arg ) {
if (preCaseBranch( arg )) {
try {
for (Statement stmt : arg.body()) {
caseBranchBeforeBodyStatement( arg ) ;
stmt.accept( context.current() ) ;
}
} finally {
postCaseBranch( arg ) ;
}
}
}
// DefinitionStatement
public boolean preDefinitionStatement( DefinitionStatement arg ) {
return preStatement( arg ) ;
}
public boolean definitionStatementBeforeExpr( DefinitionStatement arg ) {
return true ;
}
public void postDefinitionStatement( DefinitionStatement arg ) {
postStatement( arg ) ;
}
public void visitDefinitionStatement( DefinitionStatement arg ) {
if (preDefinitionStatement( arg )) {
try {
((VariableInternal)arg.var()).accept( context.current() ) ;
if (definitionStatementBeforeExpr( arg ))
((ExpressionInternal)arg.expr()).accept( context.current() ) ;
} finally {
postDefinitionStatement( arg ) ;
}
}
}
// IfStatement
public boolean preIfStatement( IfStatement arg ) {
return preStatement( arg ) ;
}
public void ifStatementBeforeTruePart( IfStatement arg ) {
}
public boolean ifStatementBeforeFalsePart( IfStatement arg ) {
return true ;
}
public void postIfStatement( IfStatement arg ) {
postStatement( arg ) ;
}
public void visitIfStatement( IfStatement arg ) {
if (preIfStatement( arg )) {
try {
((ExpressionInternal)arg.condition()).accept(
context.current() ) ;
ifStatementBeforeTruePart( arg ) ;
arg.truePart().accept( context.current() ) ;
if (ifStatementBeforeFalsePart( arg ))
arg.falsePart().accept( context.current() ) ;
} finally {
postIfStatement( arg ) ;
}
}
}
// BreakStatement
public boolean preBreakStatement( BreakStatement arg ) {
return preStatement( arg ) ;
}
public void postBreakStatement( BreakStatement arg ) {
postStatement( arg ) ;
}
public void visitBreakStatement( BreakStatement arg ) {
if (preBreakStatement( arg )) {
postBreakStatement( arg ) ;
}
}
// ReturnStatement
public boolean preReturnStatement( ReturnStatement arg ) {
return preStatement( arg ) ;
}
public void postReturnStatement( ReturnStatement arg ) {
postStatement( arg ) ;
}
public void visitReturnStatement( ReturnStatement arg ) {
if (preReturnStatement( arg )) {
try {
if (arg.expr() != null)
arg.expr().accept( context.current() ) ;
} finally {
postReturnStatement( arg ) ;
}
}
}
// SwitchStatement
public boolean preSwitchStatement( SwitchStatement arg ) {
return preStatement( arg ) ;
}
public boolean switchStatementBeforeCaseBranches( SwitchStatement arg ) {
return true ;
}
public boolean switchStatementBeforeDefault( SwitchStatement arg ) {
return true ;
}
public void postSwitchStatement( SwitchStatement arg ) {
postStatement( arg ) ;
}
public void visitSwitchStatement( SwitchStatement arg ) {
if (preSwitchStatement( arg )) {
try {
arg.expr().accept( context.current() ) ;
if (switchStatementBeforeCaseBranches( arg ))
for (Map.Entry entry : arg.cases().entrySet() ) {
entry.getValue().accept( context.current() ) ;
}
if (switchStatementBeforeDefault( arg ))
arg.defaultCase().accept( context.current() ) ;
} finally {
postSwitchStatement( arg ) ;
}
}
}
// TryStatement
public boolean preTryStatement( TryStatement arg ) {
return preStatement( arg ) ;
}
public void tryStatementBeforeBlock( TryStatement arg,
Type type, Variable var, BlockStatement block ) {
}
public boolean tryStatementBeforeFinalPart( TryStatement arg ) {
return true ;
}
public void postTryStatement( TryStatement arg ) {
postStatement( arg ) ;
}
public void visitTryStatement( TryStatement arg ) {
if (preTryStatement( arg )) {
try {
arg.bodyPart().accept( context.current() ) ;
for (Map.Entry> entry :
arg.catches().entrySet()) {
tryStatementBeforeBlock( arg, entry.getKey(),
entry.getValue().first(), entry.getValue().second()) ;
entry.getValue().second().accept( context.current() ) ;
}
if (tryStatementBeforeFinalPart( arg ))
arg.finalPart().accept( context.current() ) ;
} finally {
postTryStatement( arg ) ;
}
}
}
// WhileStatement
public boolean preWhileStatement( WhileStatement arg ) {
return preStatement( arg ) ;
}
public void whileStatementBeforeBody( WhileStatement arg ) {
}
public void postWhileStatement( WhileStatement arg ) {
postStatement( arg ) ;
}
public void visitWhileStatement( WhileStatement arg ) {
if (preWhileStatement( arg )) {
try {
((ExpressionInternal)arg.condition()).accept(
context.current() ) ;
whileStatementBeforeBody( arg ) ;
arg.body().accept( context.current() ) ;
} finally {
postWhileStatement( arg ) ;
}
}
}
// ExpressionInternal
public boolean preExpression( ExpressionInternal arg ) {
return preStatement( arg ) ;
}
public void postExpression( ExpressionInternal arg ) {
postStatement( arg ) ;
}
public void visitExpression( ExpressionInternal arg ) {
if (preExpression( arg )) {
postExpression( arg ) ;
}
}
// Variable
public boolean preVariable( Variable arg ) {
return preExpression( (VariableInternal)arg ) ;
}
public void postVariable( Variable arg ) {
postExpression( (VariableInternal)arg ) ;
}
public final void visitVariable( Variable arg ) {
if (preVariable( arg ))
postVariable( arg ) ;
}
// ConstantExpression
public boolean preConstantExpression( ExpressionFactory.ConstantExpression arg ) {
return preExpression( arg ) ;
}
public void postConstantExpression( ExpressionFactory.ConstantExpression arg ) {
postExpression( arg ) ;
}
public void visitConstantExpression( ExpressionFactory.ConstantExpression arg ) {
if (preConstantExpression( arg )) {
postConstantExpression( arg ) ;
}
}
// VoidExpression
public boolean preVoidExpression( ExpressionFactory.VoidExpression arg ) {
return preExpression( arg ) ;
}
public void postVoidExpression( ExpressionFactory.VoidExpression arg ) {
postExpression( arg ) ;
}
public void visitVoidExpression( ExpressionFactory.VoidExpression arg ) {
if (preVoidExpression( arg )) {
postVoidExpression( arg ) ;
}
}
// ThisExpression
public boolean preThisExpression( ExpressionFactory.ThisExpression arg ) {
return preExpression( arg ) ;
}
public void postThisExpression( ExpressionFactory.ThisExpression arg ) {
postExpression( arg ) ;
}
public void visitThisExpression( ExpressionFactory.ThisExpression arg ) {
if (preThisExpression( arg )) {
postThisExpression( arg ) ;
}
}
// UnaryOperatorExpression
public boolean preUnaryOperatorExpression( ExpressionFactory.UnaryOperatorExpression arg ) {
return preExpression( arg ) ;
}
public void postUnaryOperatorExpression( ExpressionFactory.UnaryOperatorExpression arg ) {
postExpression( arg ) ;
}
public void visitUnaryOperatorExpression( ExpressionFactory.UnaryOperatorExpression arg ) {
if (preUnaryOperatorExpression( arg )) {
try {
((ExpressionInternal)arg.expr()).accept( context.current() ) ;
} finally {
postUnaryOperatorExpression( arg ) ;
}
}
}
// BinaryOperatorExpression
public boolean preBinaryOperatorExpression( ExpressionFactory.BinaryOperatorExpression arg ) {
return preExpression( arg ) ;
}
public void binaryOperatorExpressionBeforeRight(
ExpressionFactory.BinaryOperatorExpression arg ) {
}
public void postBinaryOperatorExpression( ExpressionFactory.BinaryOperatorExpression arg ) {
postExpression( arg ) ;
}
public void visitBinaryOperatorExpression( ExpressionFactory.BinaryOperatorExpression arg ) {
if (preBinaryOperatorExpression( arg )) {
try {
((ExpressionInternal)arg.left()).accept( context.current() ) ;
binaryOperatorExpressionBeforeRight( arg ) ;
((ExpressionInternal)arg.right()).accept( context.current() ) ;
} finally {
postBinaryOperatorExpression( arg ) ;
}
}
}
// CastExpression
public boolean preCastExpression( ExpressionFactory.CastExpression arg ) {
return preExpression( arg ) ;
}
public void postCastExpression( ExpressionFactory.CastExpression arg ) {
postExpression( arg ) ;
}
public void visitCastExpression( ExpressionFactory.CastExpression arg ) {
if (preCastExpression( arg )) {
try {
((ExpressionInternal)arg.expr()).accept( context.current() ) ;
} finally {
postCastExpression( arg ) ;
}
}
}
// InstofExpression
public boolean preInstofExpression( ExpressionFactory.InstofExpression arg ) {
return preExpression( arg ) ;
}
public void postInstofExpression( ExpressionFactory.InstofExpression arg ) {
postExpression( arg ) ;
}
public void visitInstofExpression( ExpressionFactory.InstofExpression arg ) {
if (preInstofExpression( arg )) {
try {
((ExpressionInternal)arg.expr()).accept( context.current() ) ;
} finally {
postInstofExpression( arg ) ;
}
}
}
// StaticCallExpression
public boolean preStaticCallExpression( ExpressionFactory.StaticCallExpression arg ) {
return preExpression( arg ) ;
}
public void staticCallExpressionBeforeArg( ExpressionFactory.StaticCallExpression arg ) {
}
public void postStaticCallExpression( ExpressionFactory.StaticCallExpression arg ) {
postExpression( arg ) ;
}
public void visitStaticCallExpression( ExpressionFactory.StaticCallExpression arg ) {
if (preStaticCallExpression( arg )) {
try {
for (Expression expr : arg.args()) {
staticCallExpressionBeforeArg( arg ) ;
((ExpressionInternal)expr).accept( context.current() ) ;
}
} finally {
postStaticCallExpression( arg ) ;
}
}
}
// NonStaticCallExpression
public boolean preNonStaticCallExpression( ExpressionFactory.NonStaticCallExpression arg ) {
return preExpression( arg ) ;
}
public void nonStaticCallExpressionBeforeArg( ExpressionFactory.NonStaticCallExpression arg ) {
}
public void postNonStaticCallExpression( ExpressionFactory.NonStaticCallExpression arg ) {
postExpression( arg ) ;
}
public void visitNonStaticCallExpression( ExpressionFactory.NonStaticCallExpression arg ) {
if (preNonStaticCallExpression( arg )) {
try {
((ExpressionInternal)arg.target()).accept( context.current() ) ;
for (Expression expr : arg.args()) {
nonStaticCallExpressionBeforeArg( arg ) ;
((ExpressionInternal)expr).accept( context.current() ) ;
}
} finally {
postNonStaticCallExpression( arg ) ;
}
}
}
// NewObjExpression
public boolean preNewObjExpression( ExpressionFactory.NewObjExpression arg ) {
return preExpression( arg ) ;
}
public void newObjExpressionBeforeArg( ExpressionFactory.NewObjExpression arg ) {
}
public void postNewObjExpression( ExpressionFactory.NewObjExpression arg ) {
postExpression( arg ) ;
}
public void visitNewObjExpression( ExpressionFactory.NewObjExpression arg ) {
if (preNewObjExpression( arg )) {
try {
for (Expression expr : arg.args()) {
newObjExpressionBeforeArg( arg ) ;
((ExpressionInternal)expr).accept( context.current() ) ;
}
} finally {
postNewObjExpression( arg ) ;
}
}
}
// NewArrExpression
public boolean preNewArrExpression( ExpressionFactory.NewArrExpression arg ) {
return preExpression( arg ) ;
}
public void newArrExpressionAfterSize( ExpressionFactory.NewArrExpression arg ) {
}
public void newArrExpressionBeforeExpression( ExpressionFactory.NewArrExpression arg ) {
}
public void newArrExpressionAfterExpression( ExpressionFactory.NewArrExpression arg ) {
}
public void postNewArrExpression( ExpressionFactory.NewArrExpression arg ) {
postExpression( arg ) ;
}
public void visitNewArrExpression( ExpressionFactory.NewArrExpression arg ) {
if (preNewArrExpression( arg )) {
try {
((ExpressionInternal)arg.size()).accept( context.current() ) ;
newArrExpressionAfterSize( arg ) ;
for (Expression expr : arg.exprs()) {
newArrExpressionBeforeExpression( arg ) ;
((ExpressionInternal)expr).accept( context.current() ) ;
newArrExpressionAfterExpression( arg ) ;
}
} finally {
postNewArrExpression( arg ) ;
}
}
}
// SuperCallExpression
public boolean preSuperCallExpression( ExpressionFactory.SuperCallExpression arg ) {
return preExpression( arg ) ;
}
public void superCallExpressionBeforeArg( ExpressionFactory.SuperCallExpression arg ) {
}
public void postSuperCallExpression( ExpressionFactory.SuperCallExpression arg ) {
postExpression( arg ) ;
}
public void visitSuperCallExpression( ExpressionFactory.SuperCallExpression arg ) {
if (preSuperCallExpression( arg )) {
try {
for (Expression expr : arg.exprs()) {
superCallExpressionBeforeArg( arg ) ;
((ExpressionInternal)expr).accept( context.current() ) ;
}
} finally {
postSuperCallExpression( arg ) ;
}
}
}
// SuperObjExpression
public boolean preSuperObjExpression( ExpressionFactory.SuperObjExpression arg ) {
return preExpression( arg ) ;
}
public void superObjExpressionBeforeArg( ExpressionFactory.SuperObjExpression arg ) {
}
public void postSuperObjExpression( ExpressionFactory.SuperObjExpression arg ) {
postExpression( arg ) ;
}
public void visitSuperObjExpression( ExpressionFactory.SuperObjExpression arg ) {
if (preSuperObjExpression( arg )) {
try {
for (Expression expr : arg.exprs()) {
superObjExpressionBeforeArg( arg ) ;
((ExpressionInternal)expr).accept( context.current() ) ;
}
} finally {
postSuperObjExpression( arg ) ;
}
}
}
// ThisObjExpression
public boolean preThisObjExpression( ExpressionFactory.ThisObjExpression arg ) {
return preExpression( arg ) ;
}
public void postThisObjExpression( ExpressionFactory.ThisObjExpression arg ) {
postExpression( arg ) ;
}
public void thisObjExpressionBeforeArg( ExpressionFactory.ThisObjExpression arg ) {
}
public void visitThisObjExpression( ExpressionFactory.ThisObjExpression arg ) {
if (preThisObjExpression( arg )) {
try {
for (Expression expr : arg.exprs()) {
thisObjExpressionBeforeArg( arg ) ;
((ExpressionInternal)expr).accept( context.current() ) ;
}
} finally {
postThisObjExpression( arg ) ;
}
}
}
// NonStaticFieldAccessExpression
public boolean preNonStaticFieldAccessExpression(
ExpressionFactory.NonStaticFieldAccessExpression arg ) {
return preExpression( arg ) ;
}
public void postNonStaticFieldAccessExpression(
ExpressionFactory.NonStaticFieldAccessExpression arg ) {
postExpression( arg ) ;
}
public void visitNonStaticFieldAccessExpression(
ExpressionFactory.NonStaticFieldAccessExpression arg ) {
if (preNonStaticFieldAccessExpression( arg )) {
try {
((ExpressionInternal)arg.target()).accept( context.current() ) ;
} finally {
postNonStaticFieldAccessExpression( arg ) ;
}
}
}
// StaticFieldAccessExpression
public boolean preStaticFieldAccessExpression(
ExpressionFactory.StaticFieldAccessExpression arg ) {
return preExpression( arg ) ;
}
public void postStaticFieldAccessExpression(
ExpressionFactory.StaticFieldAccessExpression arg ) {
postExpression( arg ) ;
}
public void visitStaticFieldAccessExpression(
ExpressionFactory.StaticFieldAccessExpression arg ) {
if (preStaticFieldAccessExpression( arg )) {
postStaticFieldAccessExpression( arg ) ;
}
}
// ArrayIndexExpression
public boolean preArrayIndexExpression( ExpressionFactory.ArrayIndexExpression arg ) {
return preExpression( arg ) ;
}
public void arrayIndexExpressionBeforeExpr( ExpressionFactory.ArrayIndexExpression arg ) {
}
public void postArrayIndexExpression( ExpressionFactory.ArrayIndexExpression arg ) {
postExpression( arg ) ;
}
public void visitArrayIndexExpression( ExpressionFactory.ArrayIndexExpression arg ) {
if (preArrayIndexExpression( arg )) {
try {
((ExpressionInternal)arg.index()).accept( context.current() ) ;
arrayIndexExpressionBeforeExpr( arg ) ;
((ExpressionInternal)arg.expr()).accept( context.current() ) ;
} finally {
postArrayIndexExpression( arg ) ;
}
}
}
// ArrayLengthExpression
public boolean preArrayLengthExpression( ExpressionFactory.ArrayLengthExpression arg ) {
return preExpression( arg ) ;
}
public void postArrayLengthExpression( ExpressionFactory.ArrayLengthExpression arg ) {
postExpression( arg ) ;
}
public void visitArrayLengthExpression( ExpressionFactory.ArrayLengthExpression arg ) {
if (preArrayLengthExpression( arg )) {
try {
((ExpressionInternal)arg.expr()).accept( context.current() ) ;
} finally {
postArrayLengthExpression( arg ) ;
}
}
}
// IfExpression
public boolean preIfExpression( ExpressionFactory.IfExpression arg ) {
return preExpression( arg ) ;
}
public void ifExpressionBeforeTruePart( ExpressionFactory.IfExpression arg ) {
}
public boolean ifExpressionBeforeFalsePart( ExpressionFactory.IfExpression arg ) {
return true ;
}
public void postIfExpression( ExpressionFactory.IfExpression arg ) {
postExpression( arg ) ;
}
public void visitIfExpression( ExpressionFactory.IfExpression arg ) {
if (preIfExpression( arg )) {
try {
((ExpressionInternal)arg.condition()).accept( context.current() ) ;
ifExpressionBeforeTruePart( arg ) ;
((ExpressionInternal)arg.truePart()).accept( context.current() ) ;
if (ifExpressionBeforeFalsePart( arg ))
((ExpressionInternal)arg.falsePart()).accept( context.current() ) ;
} finally {
postIfExpression( arg ) ;
}
}
}
}