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Antlr Java Parser aims to create a Java parser using Antlr 4 grammar rules.
/*
* Copyright (C) 2015 Julio Vilmar Gesser and Mike DeHaan
*
* This file is part of antlr-java-parser.
*
* antlr-java-parser is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* antlr-java-parser 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with antlr-java-parser. If not, see {
public Expression adapt(Java7Parser.PrimaryContext context, AdapterParameters adapterParameters) {
/*
primary
locals [int operationType]
: parExpression {$operationType = 1;}
| THIS (DOT Identifier)* (thisSuffix)? {$operationType = 2;}
| Identifier (DOT Identifier)* (identifierSuffix)? {$operationType = 3;}
| SUPER superSuffix {$operationType = 4;}
| literal {$operationType = 5;}
| creator {$operationType = 6;}
| primitiveType (LBRACKET RBRACKET)* DOT CLASS {$operationType = 7;}
| VOID DOT CLASS {$operationType = 8;}
;
superSuffix
: arguments
| DOT (typeArguments)? Identifier (arguments)?
;
thisSuffix
locals [int operationType]
: (LBRACKET expression RBRACKET)+ {$operationType = 1;}
| arguments {$operationType = 2;}
| DOT nonWildcardTypeArguments Identifier arguments {$operationType = 3;}
| DOT SUPER arguments {$operationType = 4;}
| innerCreator {$operationType = 5;}
;
identifierSuffix
: (LBRACKET RBRACKET)+ DOT CLASS {$operationType = 1;}
| (LBRACKET expression RBRACKET)+ {$operationType = 2;}
| arguments {$operationType = 3;}
| DOT CLASS {$operationType = 4;}
| DOT nonWildcardTypeArguments Identifier arguments {$operationType = 5;}
| DOT THIS {$operationType = 6;}
| DOT SUPER arguments {$operationType = 7;}
| innerCreator {$operationType = 8;}
;
*/
if (context.parExpression() != null) {
return Adapters.getParExpressionContextAdapter().adapt(context.parExpression(), adapterParameters);
} else if (context.operationType == 2) {
return handleThisSuffix(context, adapterParameters);
} else if(context.operationType == 3) {
return handleIdentifierSuffix(context, adapterParameters);
} else if (context.SUPER() != null) {
return Adapters.getSuperSuffixContextAdapter().adapt(context.superSuffix(), adapterParameters);
} else if (context.literal() != null) {
return Adapters.getLiteralContextAdapter().adapt(context.literal(), adapterParameters);
} else if (context.creator() != null) {
return Adapters.getCreatorContextAdapter().adapt(context.creator(), adapterParameters);
} else if (context.primitiveType() != null) {
ClassExpr classExpr = new ClassExpr();
AdapterUtil.setComments(classExpr, context, adapterParameters);
AdapterUtil.setPosition(classExpr, context);
Type type = Adapters.getPrimitiveTypeContextAdapter().adapt(context.primitiveType(), adapterParameters);
if (context.LBRACKET() != null && context.LBRACKET().size() > 0) {
ReferenceType referenceType = new ReferenceType();
referenceType.setType(type);
referenceType.setArrayCount(context.LBRACKET().size());
type = referenceType;
}
classExpr.setType(type);
return classExpr;
} else if (context.VOID() != null) {
ClassExpr classExpr = new ClassExpr();
AdapterUtil.setComments(classExpr, context, adapterParameters);
AdapterUtil.setPosition(classExpr, context);
classExpr.setType(new VoidType());
return classExpr;
}
throw new RuntimeException("Unknown or unhandled primary context");
}
// THIS (DOT Identifier)* (identifierSuffix)? {$operationType = 2;}
// Identifier (DOT Identifier)* (identifierSuffix)? {$operationType = 3;}
private Expression handleIdentifierSuffix(Java7Parser.PrimaryContext primaryContext, AdapterParameters adapterParameters) {
/*
identifierSuffix
locals [int operationType]
: (LBRACKET RBRACKET)+ DOT CLASS {$operationType = 1;}
| (LBRACKET expression RBRACKET)+ {$operationType = 2;}
| arguments {$operationType = 3;}
| DOT CLASS {$operationType = 4;}
| DOT nonWildcardTypeArguments Identifier arguments {$operationType = 5;}
| DOT THIS {$operationType = 6;}
| innerCreator {$operationType = 7;}
;
//this.m.m.m[].class; // 0 : (LBRACKET RBRACKET)+ DOT CLASS // ClassOrInterfaceType ClassOrInterfaceType ClassOrInterfaceType ReferenceType ClassExpr
this.m.m.m[1]; // 1 | (LBRACKET expression RBRACKET)+ // NameExpr FieldAccessExpr FieldAccessExpr ArrayAccessExpr
this.m.m.m(""); // 2 | arguments // NameExpr FieldAccessExpr MethodCallExpr
//this.m.m.m.class; // 3 | DOT CLASS // ClassOrInterfaceType ClassOrInterfaceType ClassOrInterfaceType ReferenceType ClassExpr
this.m.m.m(""); // 4 | DOT nonWildcardTypeArguments Identifier arguments // NameExpr FieldAccessExpr MethodCallExpr
this.m.m.m.this; // 5 | DOT THIS // NameExpr FieldAccessExpr FieldAccessExpr ThisExpr
//m.m.super(""); // 6 | DOT SUPER arguments
*/
NameExpr nameExpr = new NameExpr();
nameExpr.setName(primaryContext.Identifier(0).getText());
Expression leftExpression = nameExpr;
for (int i = 1; i < primaryContext.Identifier().size(); i++) {
FieldAccessExpr fieldAccessExpr = new FieldAccessExpr();
fieldAccessExpr.setField(primaryContext.Identifier(i).getText());
fieldAccessExpr.setScope(leftExpression);
leftExpression = fieldAccessExpr;
}
// if identifierSuffix is null/not specified
if (primaryContext.identifierSuffix() == null) {
return leftExpression;
}
ClassOrInterfaceType rootType = new ClassOrInterfaceType();
if (primaryContext.Identifier() != null && primaryContext.Identifier().size() > 0) {
rootType.setName(primaryContext.Identifier(0).getText());
}
switch (primaryContext.identifierSuffix().operationType) {
case 1:
case 4:
// Need to consider these Identifiers as Types
// The last one should be a referenceType
ClassOrInterfaceType leftType = rootType;
for (int i = 0; i < primaryContext.Identifier().size(); i++) {
ClassOrInterfaceType classOrInterfaceType = new ClassOrInterfaceType();
classOrInterfaceType.setName(primaryContext.Identifier(i).getText());
// Don't set the scope on the first type (because it will be itself)
if (i > 0) {
classOrInterfaceType.setScope(leftType);
}
leftType = classOrInterfaceType;
}
ReferenceType referenceType = new ReferenceType();
referenceType.setType(leftType);
if (primaryContext.identifierSuffix().LBRACKET() != null) {
referenceType.setArrayCount(primaryContext.identifierSuffix().LBRACKET().size());
}
ClassExpr classExpr = new ClassExpr();
classExpr.setType(referenceType);
return classExpr;
case 2:
for (int i = 0; i < primaryContext.identifierSuffix().LBRACKET().size(); i++) {
ArrayAccessExpr arrayAccessExpr = new ArrayAccessExpr();
arrayAccessExpr.setName(leftExpression);
arrayAccessExpr.setIndex(Adapters.getExpressionContextAdapter().adapt(primaryContext.identifierSuffix().expression(i), adapterParameters));
leftExpression = arrayAccessExpr;
}
return leftExpression;
case 3:
MethodCallExpr methodCallExpr = new MethodCallExpr();
if (leftExpression instanceof NameExpr) {
methodCallExpr.setName(((NameExpr)leftExpression).getName());
} else if (leftExpression instanceof FieldAccessExpr) {
methodCallExpr.setName(((FieldAccessExpr)leftExpression).getField());
// Set the leftExpression back one since we're changing the top one to a method call
leftExpression = ((FieldAccessExpr) leftExpression).getScope();
methodCallExpr.setScope(leftExpression);
}
methodCallExpr.setArgs(Adapters.getArgumentsContextAdapter().adapt(primaryContext.identifierSuffix().arguments(), adapterParameters));
leftExpression = methodCallExpr;
return leftExpression;
case 5:
List typeList = Adapters.getTypeListContextAdapter().adapt(primaryContext.identifierSuffix().nonWildcardTypeArguments().typeList(), adapterParameters);
MethodCallExpr typeArgMethodCallExpr = new MethodCallExpr();
typeArgMethodCallExpr.setName(primaryContext.identifierSuffix().Identifier().getText());
typeArgMethodCallExpr.setTypeArgs(typeList);
typeArgMethodCallExpr.setScope(leftExpression);
typeArgMethodCallExpr.setArgs(Adapters.getArgumentsContextAdapter().adapt(primaryContext.identifierSuffix().arguments(), adapterParameters));
leftExpression = typeArgMethodCallExpr;
return leftExpression;
case 6:
ThisExpr thisExpr= new ThisExpr();
thisExpr.setClassExpr(leftExpression);
return thisExpr;
case 7:
ObjectCreationExpr objectCreationExpr = Adapters.getInnerCreatorContextAdapter().adapt(primaryContext.identifierSuffix().innerCreator(), adapterParameters);
objectCreationExpr.setScope(leftExpression);
return objectCreationExpr;
}
return null;
}
// THIS (DOT Identifier)* (thisSuffix)? {$operationType = 2;}
private Expression handleThisSuffix(Java7Parser.PrimaryContext primaryContext, AdapterParameters adapterParameters) {
/*
thisSuffix
locals [int operationType]
: (LBRACKET expression RBRACKET)+ {$operationType = 1;}
| arguments {$operationType = 2;}
| DOT nonWildcardTypeArguments Identifier arguments {$operationType = 3;}
| innerCreator {$operationType = 4;}
;
//this.m.m.m[].class; // 0 : (LBRACKET RBRACKET)+ DOT CLASS // ClassOrInterfaceType ClassOrInterfaceType ClassOrInterfaceType ReferenceType ClassExpr
this.m.m.m[1]; // 1 | (LBRACKET expression RBRACKET)+ // NameExpr FieldAccessExpr FieldAccessExpr ArrayAccessExpr
this.m.m.m(""); // 2 | arguments // NameExpr FieldAccessExpr MethodCallExpr
//this.m.m.m.class; // 3 | DOT CLASS // ClassOrInterfaceType ClassOrInterfaceType ClassOrInterfaceType ReferenceType ClassExpr
this.m.m.m(""); // 4 | DOT nonWildcardTypeArguments Identifier arguments // NameExpr FieldAccessExpr MethodCallExpr
this.m.m.m.this; // 5 | DOT THIS // NameExpr FieldAccessExpr FieldAccessExpr ThisExpr
//m.m.super(""); // 6 | DOT SUPER arguments
*/
ThisExpr thisExpr = new ThisExpr();
Expression leftExpression = thisExpr;
for (int i = 0; i < primaryContext.Identifier().size(); i++) {
FieldAccessExpr fieldAccessExpr = new FieldAccessExpr();
fieldAccessExpr.setField(primaryContext.Identifier(i).getText());
fieldAccessExpr.setScope(leftExpression);
leftExpression = fieldAccessExpr;
}
// if thisSuffix is null/not specified
if (primaryContext.thisSuffix() == null) {
return leftExpression;
}
ClassOrInterfaceType rootType = new ClassOrInterfaceType();
if (primaryContext.Identifier() != null && primaryContext.Identifier().size() > 0) {
rootType.setName(primaryContext.Identifier(0).getText());
}
switch (primaryContext.thisSuffix().operationType) {
case 1:
for (int i = 0; i < primaryContext.thisSuffix().LBRACKET().size(); i++) {
ArrayAccessExpr arrayAccessExpr = new ArrayAccessExpr();
arrayAccessExpr.setName(leftExpression);
arrayAccessExpr.setIndex(Adapters.getExpressionContextAdapter().adapt(primaryContext.thisSuffix().expression(i), adapterParameters));
leftExpression = arrayAccessExpr;
}
return leftExpression;
case 2:
MethodCallExpr methodCallExpr = new MethodCallExpr();
if (leftExpression instanceof FieldAccessExpr) {
methodCallExpr.setName(((FieldAccessExpr)leftExpression).getField());
// Set the leftExpression back one since we're changing the top one to a method call
leftExpression = ((FieldAccessExpr) leftExpression).getScope();
methodCallExpr.setScope(leftExpression);
}
if (methodCallExpr.getName() == null) {
throw new RuntimeException("Syntax Error: possibly calling 'this' as a method with arguments. Something like 'this(\"\")'");
}
methodCallExpr.setArgs(Adapters.getArgumentsContextAdapter().adapt(primaryContext.thisSuffix().arguments(), adapterParameters));
leftExpression = methodCallExpr;
return leftExpression;
case 3:
List typeList = Adapters.getTypeListContextAdapter().adapt(primaryContext.thisSuffix().nonWildcardTypeArguments().typeList(), adapterParameters);
MethodCallExpr typeArgMethodCallExpr = new MethodCallExpr();
typeArgMethodCallExpr.setName(primaryContext.thisSuffix().Identifier().getText());
typeArgMethodCallExpr.setTypeArgs(typeList);
typeArgMethodCallExpr.setScope(leftExpression);
typeArgMethodCallExpr.setArgs(Adapters.getArgumentsContextAdapter().adapt(primaryContext.thisSuffix().arguments(), adapterParameters));
leftExpression = typeArgMethodCallExpr;
return leftExpression;
case 4:
ObjectCreationExpr objectCreationExpr = Adapters.getInnerCreatorContextAdapter().adapt(primaryContext.thisSuffix().innerCreator(), adapterParameters);
objectCreationExpr.setScope(leftExpression);
return objectCreationExpr;
}
return null;
}
}
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