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cfml.parsing.cfscript.walker.CFExpressionVisitor Maven / Gradle / Ivy
package cfml.parsing.cfscript.walker;
import java.util.Stack;
import org.antlr.v4.runtime.Token;
import org.antlr.v4.runtime.tree.ParseTree;
import org.antlr.v4.runtime.tree.TerminalNode;
import cfml.CFSCRIPTLexer;
import cfml.CFSCRIPTParser.AnonymousFunctionDeclarationContext;
import cfml.CFSCRIPTParser.ArgumentContext;
import cfml.CFSCRIPTParser.ArrayContext;
import cfml.CFSCRIPTParser.ArrayMemberExpressionContext;
import cfml.CFSCRIPTParser.AssignmentExpressionContext;
import cfml.CFSCRIPTParser.BaseExpressionContext;
import cfml.CFSCRIPTParser.CfmlFunctionContext;
import cfml.CFSCRIPTParser.CompareExpressionContext;
import cfml.CFSCRIPTParser.ComponentAttributeContext;
import cfml.CFSCRIPTParser.ComponentGutsContext;
import cfml.CFSCRIPTParser.ComponentPathContext;
import cfml.CFSCRIPTParser.ConditionContext;
import cfml.CFSCRIPTParser.ConstantExpressionContext;
import cfml.CFSCRIPTParser.ElvisExpressionContext;
import cfml.CFSCRIPTParser.FloatingPointExpressionContext;
import cfml.CFSCRIPTParser.ForInKeyContext;
import cfml.CFSCRIPTParser.FunctionAttributeContext;
import cfml.CFSCRIPTParser.FunctionCallContext;
import cfml.CFSCRIPTParser.IdentifierContext;
import cfml.CFSCRIPTParser.ImplicitArrayContext;
import cfml.CFSCRIPTParser.ImplicitStructContext;
import cfml.CFSCRIPTParser.ImplicitStructExpressionContext;
import cfml.CFSCRIPTParser.InnerExpressionContext;
import cfml.CFSCRIPTParser.LiteralExpressionContext;
import cfml.CFSCRIPTParser.LocalAssignmentExpressionContext;
import cfml.CFSCRIPTParser.MemberExpressionContext;
import cfml.CFSCRIPTParser.MultipartIdentifierContext;
import cfml.CFSCRIPTParser.NewComponentExpressionContext;
import cfml.CFSCRIPTParser.OtherIdentifiersContext;
import cfml.CFSCRIPTParser.ParameterAttributeContext;
import cfml.CFSCRIPTParser.ParameterContext;
import cfml.CFSCRIPTParser.ParameterTypeContext;
import cfml.CFSCRIPTParser.ParentheticalExpressionContext;
import cfml.CFSCRIPTParser.ParentheticalMemberExpressionContext;
import cfml.CFSCRIPTParser.PrimaryExpressionContext;
import cfml.CFSCRIPTParser.PrimaryExpressionIRWContext;
import cfml.CFSCRIPTParser.StringLiteralContext;
import cfml.CFSCRIPTParser.StringLiteralPartContext;
import cfml.CFSCRIPTParser.TagFunctionStatementContext;
import cfml.CFSCRIPTParser.TagOperatorStatementContext;
import cfml.CFSCRIPTParser.TernaryExpressionContext;
import cfml.CFSCRIPTParser.TypeContext;
import cfml.CFSCRIPTParser.TypeSpecContext;
import cfml.CFSCRIPTParser.UnaryExpressionContext;
import cfml.CFSCRIPTParserBaseVisitor;
import cfml.parsing.cfscript.ArgumentsVector;
import cfml.parsing.cfscript.CFAnonymousFunctionExpression;
import cfml.parsing.cfscript.CFArrayExpression;
import cfml.parsing.cfscript.CFAssignmentExpression;
import cfml.parsing.cfscript.CFBinaryExpression;
import cfml.parsing.cfscript.CFElvisExpression;
import cfml.parsing.cfscript.CFExpression;
import cfml.parsing.cfscript.CFFullVarExpression;
import cfml.parsing.cfscript.CFFunctionExpression;
import cfml.parsing.cfscript.CFIdentifier;
import cfml.parsing.cfscript.CFLiteral;
import cfml.parsing.cfscript.CFMember;
import cfml.parsing.cfscript.CFNestedExpression;
import cfml.parsing.cfscript.CFNewExpression;
import cfml.parsing.cfscript.CFStringExpression;
import cfml.parsing.cfscript.CFStructElementExpression;
import cfml.parsing.cfscript.CFStructExpression;
import cfml.parsing.cfscript.CFTernaryExpression;
import cfml.parsing.cfscript.CFUnaryExpression;
import cfml.parsing.cfscript.CFVarDeclExpression;
import cfml.parsing.cfscript.script.CFFuncDeclStatement;
public class CFExpressionVisitor extends CFSCRIPTParserBaseVisitor {
Stack aggregator = new Stack();
CFScriptStatementVisitor scriptStatementVisitor = null;
public CFExpressionVisitor() {
super();
}
@Override
public CFExpression visitCompareExpression(CompareExpressionContext ctx) {
if (ctx.getChildCount() == 0) {
return null;
}
CFExpression compareExpression = null;
if (ctx.right != null) {
compareExpression = new CFBinaryExpression(getTerminalToken(ctx.operator), visit(ctx.left), visit(ctx.right));
} else {
compareExpression = visit(ctx.left);
}
return compareExpression;
}
@Override
public CFExpression visitParameterType(ParameterTypeContext ctx) {
return super.visitParameterType(ctx);
}
@Override
public CFExpression visitComponentAttribute(ComponentAttributeContext ctx) {
return super.visitComponentAttribute(ctx);
}
@Override
public CFExpression visitTypeSpec(TypeSpecContext ctx) {
// TODO Auto-generated method stub
return super.visitTypeSpec(ctx);
}
@Override
public CFExpression visitFunctionAttribute(FunctionAttributeContext ctx) {
return super.visitFunctionAttribute(ctx);
}
@Override
public CFExpression visitParameterAttribute(ParameterAttributeContext ctx) {
return super.visitParameterAttribute(ctx);
}
@Override
public CFExpression visitComponentGuts(ComponentGutsContext ctx) {
return super.visitComponentGuts(ctx);
}
@Override
public CFExpression visitCondition(ConditionContext ctx) {
return super.visitCondition(ctx);
}
@Override
public CFExpression visitForInKey(ForInKeyContext ctx) {
if (ctx.VAR() != null) {
CFVarDeclExpression declExpression = new CFVarDeclExpression(ctx.VAR().getSymbol(), (CFIdentifier) visitChildren(ctx),
(CFExpression) null);
return declExpression;
}
return super.visitForInKey(ctx);
}
@Override
public CFExpression visitConstantExpression(ConstantExpressionContext ctx) {
if (ctx.floatingPointExpression() != null) {
return visitFloatingPointExpression(ctx.floatingPointExpression());
} else if (ctx.MINUS() != null) {
return new CFUnaryExpression(ctx.MINUS().getSymbol(), visitConstantExpression(ctx.constantExpression()));
} else if (ctx.LEFTPAREN() != null) {
return new CFUnaryExpression(ctx.LEFTPAREN().getSymbol(), visitConstantExpression(ctx.constantExpression()));
} else if (ctx.stringLiteral() != null) {
return visitStringLiteral(ctx.stringLiteral());
} else {
return new CFLiteral(ctx.start);
}
}
@Override
public CFExpression visitStringLiteral(StringLiteralContext ctx) {
CFStringExpression stringExpression = new CFStringExpression(ctx.getStart());
for (ParseTree child : ctx.children) {
CFExpression result = super.visit(child);
if (result != null)
stringExpression.getSubExpressions().add(result);
}
return stringExpression;
}
@Override
public CFExpression visitStringLiteralPart(StringLiteralPartContext ctx) {
CFLiteral literal = new CFLiteral(ctx.start);
return literal;
}
@Override
public CFExpression visitLocalAssignmentExpression(LocalAssignmentExpressionContext ctx) {
CFIdentifier identifier = (CFIdentifier) visit(ctx.left);
CFExpression initExpression = visit(ctx.right);
CFVarDeclExpression retval = new CFVarDeclExpression(ctx.start, identifier, initExpression);
if (ctx.otherIdentifiers().size() > 0) {
for (OtherIdentifiersContext oi : ctx.otherIdentifiers()) {
CFIdentifier otherid = (CFIdentifier) visit(oi.identifier());
if (oi.VAR() != null) {
retval.getOtherVars().add(otherid);
} else {
retval.getOtherIds().add(otherid);
}
}
}
return retval;
}
@Override
public CFExpression visitAssignmentExpression(AssignmentExpressionContext ctx) {
if (ctx.right == null) {
return visitStartExpression(ctx.left);
} else {
CFAssignmentExpression assignmentExpression = new CFAssignmentExpression(getTerminalToken(ctx.getChild(1)),
visit(ctx.left), visit(ctx.right));
for (IdentifierContext oi : ctx.identifier()) {
CFIdentifier otherid = (CFIdentifier) visit(oi);
assignmentExpression.getOtherIds().add(otherid);
}
return assignmentExpression;
}
}
@Override
public CFExpression visitBaseExpression(BaseExpressionContext ctx) {
if (ctx.getChildCount() == 0) {
return null;
}
if (ctx.notExpression() != null) {
return new CFUnaryExpression(getTerminalToken(ctx.notExpression().getChild(0)),
visit(ctx.notExpression().startExpression()));
} else if (ctx.notNotExpression() != null) {
return new CFUnaryExpression(getTerminalToken(ctx.notNotExpression().getChild(0)),
visit(ctx.notNotExpression().startExpression()));
} else if (ctx.unaryExpression() != null) {
return visitUnaryExpression(ctx.unaryExpression());
} else if (ctx.ternaryExpression() != null) {
TernaryExpressionContext tex = ctx.ternaryExpression();
CFTernaryExpression ternaryExpression = new CFTernaryExpression(tex.getStart(), visit(ctx.baseExpression()),
visit(tex.ternaryExpression1), visit(tex.ternaryExpression2));
return ternaryExpression;
} else if (ctx.getChild(0).getChildCount() == 3)
{
CFBinaryExpression binaryExpression = new CFBinaryExpression(getTerminalToken(ctx.getChild(0).getChild(1)),
visit(ctx.getChild(0).getChild(0)), visit(ctx.getChild(0).getChild(2)));
return binaryExpression;
} else
{
return visitChildren(ctx);
}
}
@Override
public CFExpression visitUnaryExpression(UnaryExpressionContext ctx) {
if (ctx.getChildCount() < 2) {
return super.visitChildren(ctx);
} else {
CFUnaryExpression unaryExpression = new CFUnaryExpression(ctx.start, super.visitChildren(ctx));
return unaryExpression;
}
}
@Override
public CFExpression visitParentheticalExpression(ParentheticalExpressionContext ctx) {
if (ctx.getChildCount() == 3) {
CFUnaryExpression unaryExpression = new CFUnaryExpression(getTerminalToken(ctx.getChild(0)), visit(ctx.getChild(1)));
return unaryExpression;
} else {
return super.visitParentheticalExpression(ctx);
}
}
/*
* (non-Javadoc)
*
* @see cfml.CFSCRIPTParserBaseVisitor#visitParentheticalMemberExpression(cfml.CFSCRIPTParser.
* ParentheticalMemberExpressionContext) Load the member expression as an empty function.
*/
@Override
public CFExpression visitParentheticalMemberExpression(ParentheticalMemberExpressionContext ctx) {
ArgumentsVector args = new ArgumentsVector();
if (ctx.argumentList() != null) {
for (ArgumentContext argCtx : ctx.argumentList().argument()) {
if (argCtx.name != null) {
args.addNamedArg(visit(argCtx.name), visit(argCtx.startExpression()));
} else {
args.add(visit(argCtx));
}
}
}
CFFunctionExpression cfFunctionExpression = new CFFunctionExpression(ctx.LEFTPAREN().getSymbol(), null, args);
return cfFunctionExpression;
}
@Override
public CFExpression visitMemberExpression(MemberExpressionContext ctx) {
CFFullVarExpression fullVarExpression = new CFFullVarExpression(ctx.start, null);
aggregator.push(fullVarExpression);
CFExpression retval = visitChildren(ctx);
aggregator.pop();
// negative if minus present
if (ctx.MINUS() != null) {
retval = new CFUnaryExpression(ctx.MINUS().getSymbol(), retval);
}
return retval;
}
@Override
public CFExpression visitInnerExpression(InnerExpressionContext ctx) {
return new CFNestedExpression(ctx.POUND_SIGN(0).getSymbol(), visit(ctx.baseOrTernaryExpression()));
}
@Override
public CFExpression visitArrayMemberExpression(ArrayMemberExpressionContext ctx) {
CFMember member = new CFMember(ctx.getStart(), visit(ctx.getChild(1)));
return member;
}
@Override
public CFExpression visitPrimaryExpressionIRW(PrimaryExpressionIRWContext ctx) {
if (ctx.start.getType() == CFSCRIPTLexer.BOOLEAN_LITERAL || ctx.start.getType() == CFSCRIPTLexer.INTEGER_LITERAL) {
return new CFLiteral(ctx.start);
}
return super.visitPrimaryExpressionIRW(ctx);
}
@Override
public CFExpression visitArgument(ArgumentContext ctx) {
CFExpression retval = super.visitArgument(ctx);
return retval;
}
@Override
public CFExpression visitIdentifier(IdentifierContext ctx) {
if (ctx.getChildCount() > 1)
return new CFIdentifier(ctx.start, ctx.getChild(0).getText(), ctx.getChild(1).getText());
else
return new CFIdentifier(ctx.start, ctx.getChild(0).getText());
}
@Override
public CFExpression visitType(TypeContext ctx) {
return new CFIdentifier(ctx.start, ctx.getChild(0).getText());
}
@Override
public CFExpression visitPrimaryExpression(PrimaryExpressionContext ctx) {
ParseTree child = ctx.getChild(0);
if (child.getChildCount() == 0) {
CFLiteral literal = new CFLiteral(((TerminalNode) child).getSymbol());
return literal;
} else {
return visitChildren(ctx);
}
}
@Override
public CFExpression visitImplicitArray(ImplicitArrayContext ctx) {
CFArrayExpression arrayExpression = new CFArrayExpression(ctx.getStart());
aggregator.push(arrayExpression);
CFExpression retval = super.visitImplicitArray(ctx);
aggregator.pop();
if (retval != null && retval != arrayExpression) {
arrayExpression.addElement(retval);
}
return arrayExpression;
}
@Override
public CFExpression visitImplicitStruct(ImplicitStructContext ctx) {
CFStructExpression structExpression = new CFStructExpression(ctx.getStart());
aggregator.push(structExpression);
CFExpression retval = super.visitImplicitStruct(ctx);
aggregator.pop();
if (retval instanceof CFStructElementExpression) {
structExpression.addElement((CFStructElementExpression) retval);
}
return structExpression;
}
@Override
public CFExpression visitElvisExpression(ElvisExpressionContext ctx) {
// TODO Auto-generated method stub
CFElvisExpression expr = new CFElvisExpression(ctx.getStart(), visit(ctx.getChild(0)), visit(ctx.getChild(3)));
// return super.visitElvisExpression(ctx);
return expr;
}
@Override
public CFExpression visitImplicitStructExpression(ImplicitStructExpressionContext ctx) {
CFStructElementExpression elementExpression = new CFStructElementExpression(ctx.getStart(),
makeIdentifier(visit(ctx.getChild(0))), visit(ctx.getChild(2)));
return elementExpression;
}
private CFIdentifier makeIdentifier(CFExpression visit) {
if (visit instanceof CFIdentifier) {
return (CFIdentifier) visit;
} else {
return new CFFullVarExpression(visit.getToken(), visit);
}
}
@Override
public CFExpression visitNewComponentExpression(NewComponentExpressionContext ctx) {
ArgumentsVector args = new ArgumentsVector();
if (ctx.getChildCount() > 4) {
for (ArgumentContext argCtx : ctx.argumentList().argument()) {
args.add(visit(argCtx));
}
}
CFNewExpression newExpression = new CFNewExpression(ctx.NEW().getSymbol(), visit(ctx.componentPath()), args);
return newExpression;
}
@Override
public CFExpression visitComponentPath(ComponentPathContext ctx) {
return super.visitChildren(ctx);
}
@Override
public CFExpression visitLiteralExpression(LiteralExpressionContext ctx) {
if (ctx.floatingPointExpression() != null) {
return visitFloatingPointExpression(ctx.floatingPointExpression());
}
if (ctx.stringLiteral() != null) {
return visitStringLiteral(ctx.stringLiteral());
}
return new CFLiteral(ctx.start);
}
@Override
public CFExpression visitFloatingPointExpression(FloatingPointExpressionContext ctx) {
if (ctx.right != null) {
return new CFLiteral(ctx.start, (ctx.left != null ? ctx.left.getText() : "") + "." + ctx.right.getText());
} else if (ctx.leftonly != null) {
return new CFLiteral(ctx.leftonly, ctx.leftonly.getText() + ".");
} else {
return new CFLiteral(ctx.start);
}
}
@Override
public CFExpression visitFunctionCall(FunctionCallContext ctx) {
ArgumentsVector args = new ArgumentsVector();
if (ctx.argumentList() != null) {
for (ArgumentContext argCtx : ctx.argumentList().argument()) {
if (argCtx.name != null) {
args.addNamedArg(visit(argCtx.name), visit(argCtx.startExpression()));
} else {
args.add(visit(argCtx));
}
}
}
CFFunctionExpression cfFunctionExpression = new CFFunctionExpression((CFIdentifier) visit(ctx.getChild(0)), args);
if (ctx.body != null) {
cfFunctionExpression.setBody(getCFScriptStatementVisitor().visit(ctx.body));
}
return cfFunctionExpression;
}
@Override
public CFExpression visitTagOperatorStatement(TagOperatorStatementContext ctx) {
// TODO Auto-generated method stub
return super.visitTagOperatorStatement(ctx);
}
@Override
public CFExpression visitCfmlFunction(CfmlFunctionContext ctx) {
return new CFIdentifier(ctx.start, ctx.getChild(0).getText());
}
@Override
public CFExpression visitTagFunctionStatement(TagFunctionStatementContext ctx) {
// TODO Auto-generated method stub
// return super.visitTagFunctionStatement(ctx);
ArgumentsVector args = new ArgumentsVector();
if (ctx.parameterList() != null) {
for (ParameterContext argCtx : ctx.parameterList().parameter()) {
if (argCtx.name != null) {
args.addNamedArg(visit(argCtx.name), visit(argCtx.startExpression()));
} else {
args.add(visit(argCtx));
}
}
}
CFFunctionExpression cfFunctionExpression = new CFFunctionExpression((CFIdentifier) visit(ctx.getChild(0)), args);
return cfFunctionExpression;
}
@Override
public CFExpression visitMultipartIdentifier(MultipartIdentifierContext ctx) {
if (ctx.getChildCount() < 2) {
return super.visitMultipartIdentifier(ctx);
} else {
CFFullVarExpression fullVarExpression = new CFFullVarExpression(ctx.getStart(), null);
aggregator.push(fullVarExpression);
try {
return visitChildren(ctx);
} finally {
aggregator.pop();
}
}
}
@Override
public CFExpression visitArray(ArrayContext ctx) {
return new CFIdentifier(ctx.start, ctx.start.getText() + ctx.stop.getText());
}
@Override
public CFExpression visitAnonymousFunctionDeclaration(AnonymousFunctionDeclarationContext ctx) {
CFFuncDeclStatement funcDeclStatement = (CFFuncDeclStatement) getCFScriptStatementVisitor()
.visitAnonymousFunctionDeclaration(ctx);
return new CFAnonymousFunctionExpression(ctx.FUNCTION().getSymbol(), funcDeclStatement);
}
public synchronized CFScriptStatementVisitor getCFScriptStatementVisitor() {
if (scriptStatementVisitor == null) {
scriptStatementVisitor = new CFScriptStatementVisitor();
}
return scriptStatementVisitor;
}
@Override
protected CFExpression aggregateResult(CFExpression aggregate, CFExpression nextResult) {
if (nextResult == null) {
return aggregate;
}
if (aggregate == null) {
return nextResult;
}
try {
if (aggregate instanceof CFNewExpression) {
CFFullVarExpression fullVarExpression = new CFFullVarExpression(aggregate.getToken(), aggregate);
fullVarExpression.addMember(nextResult);
aggregate = fullVarExpression;
} else if (aggregate instanceof CFFullVarExpression) {
((CFFullVarExpression) aggregate).addMember(nextResult);
} else if (!aggregator.isEmpty() && aggregator.peek() instanceof CFFullVarExpression) {
CFFullVarExpression fullVarExpression = (CFFullVarExpression) aggregator.peek();
if (aggregate != fullVarExpression) {
fullVarExpression.addMember(aggregate);
}
fullVarExpression.addMember(nextResult);
aggregate = fullVarExpression;
} else if (!aggregator.isEmpty() && aggregator.peek() instanceof CFArrayExpression) {
CFArrayExpression arrayExpression = (CFArrayExpression) aggregator.peek();
if (aggregate != arrayExpression) {
arrayExpression.addElement(aggregate);
}
arrayExpression.addElement(nextResult);
aggregate = arrayExpression;
} else if (!aggregator.isEmpty() && aggregator.peek() instanceof CFStructExpression) {
CFStructExpression structExpression = (CFStructExpression) aggregator.peek();
if (aggregate != structExpression && aggregate instanceof CFStructElementExpression) {
structExpression.addElement((CFStructElementExpression) aggregate);
}
if (nextResult instanceof CFStructElementExpression) {
structExpression.addElement((CFStructElementExpression) nextResult);
}
aggregate = structExpression;
}
// Convert an simple identifier to a full var expression with members.
// or add another member to a full var expression.
else if (nextResult instanceof CFIdentifier || nextResult instanceof CFMember) {
CFFullVarExpression fullVar = new CFFullVarExpression(aggregate.getToken(), aggregate);
fullVar.addMember(nextResult);
aggregate = fullVar;
}
// Struct elements {"x" : "abc", "y" : "123"} are aggregated
else if (nextResult instanceof CFStructElementExpression) {
if (aggregate instanceof CFStructElementExpression) {
CFStructExpression structExpression = new CFStructExpression(aggregate.getToken());
structExpression.addElement((CFStructElementExpression) aggregate);
structExpression.addElement((CFStructElementExpression) nextResult);
aggregate = structExpression;
} else if (aggregate instanceof CFStructExpression) {
((CFStructExpression) aggregate).addElement((CFStructElementExpression) nextResult);
}
}
return aggregate;
} finally {
}
}
private Token getTerminalToken(ParseTree child) {
if (child instanceof TerminalNode) {
return ((TerminalNode) child).getSymbol();
}
if (child.getChildCount() == 1) {
return getTerminalToken(child.getChild(0));
}
return null;
}
public void clear() {
aggregator.clear();
}
}
