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package com.github.javaparser;
import com.github.javaparser.ast.ArrayCreationLevel;
import com.github.javaparser.ast.Modifier;
import com.github.javaparser.ast.Node;
import com.github.javaparser.ast.NodeList;
import com.github.javaparser.ast.body.Parameter;
import com.github.javaparser.ast.expr.*;
import com.github.javaparser.ast.stmt.Statement;
import com.github.javaparser.ast.type.ArrayType;
import com.github.javaparser.ast.type.Type;
import com.github.javaparser.ast.type.UnknownType;
import com.github.javaparser.utils.Pair;
import java.util.*;
import static com.github.javaparser.GeneratedJavaParser.CustomToken;
import static com.github.javaparser.ast.type.ArrayType.unwrapArrayTypes;
import static com.github.javaparser.ast.type.ArrayType.wrapInArrayTypes;
/**
* Support class for {@link GeneratedJavaParser}
*/
class GeneratedJavaParserSupport {
/** Quickly create a new NodeList */
static <X extends Node> NodeList<X> emptyList() {
return new NodeList<>();
}
/** Add obj to list and return it. Create a new list if list is null */
static <T extends Node> NodeList<T> add(NodeList<T> list, T obj) {
if (list == null) {
list = new NodeList<T>();
}
list.add(obj);
return list;
}
/** Add obj to list only when list is not null */
static <T extends Node> NodeList<T> addWhenNotNull(NodeList<T> list, T obj) {
if (obj == null) {
return list;
}
return add(list, obj);
}
/** Add obj to list at position pos */
static <T extends Node> NodeList<T> add(int pos, NodeList<T> list, T obj) {
if (list == null) {
list = new NodeList<T>();
}
list.add(pos, obj);
return list;
}
/** Add obj to list */
static <T> List<T> add(List<T> list, T obj) {
if (list == null) {
list = new LinkedList<T>();
}
list.add(obj);
return list;
}
/** Add modifier mod to modifiers */
static void addModifier(GeneratedJavaParser generatedJavaParser, EnumSet<Modifier> modifiers, Modifier mod) {
if (modifiers.contains(mod)) {
generatedJavaParser.addProblem("Duplicated modifier");
}
modifiers.add(mod);
}
/** Return a TokenRange spanning from begin to end */
static TokenRange range(JavaToken begin, JavaToken end) {
return new TokenRange(begin, end);
}
/** Return a TokenRange spanning from begin to end */
static TokenRange range(Node begin, Node end) {
return new TokenRange(begin.getTokenRange().get().getBegin(), end.getTokenRange().get().getEnd());
}
/** Workaround for rather complex ambiguity that lambda's create */
static Expression generateLambda(GeneratedJavaParser generatedJavaParser, Expression ret, Statement lambdaBody) {
if (ret instanceof EnclosedExpr) {
Optional<Expression> inner = ((EnclosedExpr) ret).getInner();
if (inner.isPresent() && inner.get() instanceof NameExpr) {
SimpleName id = ((NameExpr) inner.get()).getName();
NodeList<Parameter> params = add(new NodeList<>(), new Parameter(ret.getTokenRange().get(), EnumSet.noneOf(Modifier.class), new NodeList<>(), new UnknownType(), false, new NodeList<>(), id));
ret = new LambdaExpr(range(ret, lambdaBody), params, lambdaBody, true);
} else {
ret = new LambdaExpr(range(ret, lambdaBody), new NodeList<>(), lambdaBody, true);
}
} else if (ret instanceof NameExpr) {
SimpleName id = ((NameExpr) ret).getName();
NodeList<Parameter> params = add(new NodeList<>(), new Parameter(ret.getTokenRange().get(), EnumSet.noneOf(Modifier.class), new NodeList<>(), new UnknownType(), false, new NodeList<>(), id));
ret = new LambdaExpr(range(ret, lambdaBody), params, lambdaBody, false);
} else if (ret instanceof LambdaExpr) {
((LambdaExpr) ret).setBody(lambdaBody);
ret.setTokenRange(range(ret, lambdaBody));
} else if (ret instanceof CastExpr) {
CastExpr castExpr = (CastExpr) ret;
Expression inner = generateLambda(generatedJavaParser, castExpr.getExpression(), lambdaBody);
castExpr.setExpression(inner);
} else {
generatedJavaParser.addProblem("Failed to parse lambda expression! Please create an issue at https://github.com/javaparser/javaparser/issues");
}
return ret;
}
/** Throws together an ArrayCreationExpr from a lot of pieces */
static ArrayCreationExpr juggleArrayCreation(TokenRange range, List<TokenRange> levelRanges, Type type, NodeList<Expression> dimensions, List<NodeList<AnnotationExpr>> arrayAnnotations, ArrayInitializerExpr arrayInitializerExpr) {
NodeList<ArrayCreationLevel> levels = new NodeList<ArrayCreationLevel>();
for (int i = 0; i < arrayAnnotations.size(); i++) {
levels.add(new ArrayCreationLevel(levelRanges.get(i), dimensions.get(i), arrayAnnotations.get(i)));
}
return new ArrayCreationExpr(range, type, levels, arrayInitializerExpr);
}
/** Throws together a Type, taking care of all the array brackets */
static Type juggleArrayType(Type partialType, List<ArrayType.ArrayBracketPair> additionalBrackets) {
Pair<Type, List<ArrayType.ArrayBracketPair>> partialParts = unwrapArrayTypes(partialType);
Type elementType = partialParts.a;
List<ArrayType.ArrayBracketPair> leftMostBrackets = partialParts.b;
return wrapInArrayTypes(elementType, leftMostBrackets, additionalBrackets).clone();
}
/** Create a TokenRange that spans exactly one token */
static TokenRange tokenRange(Token token) {
JavaToken javaToken = ((CustomToken) token).javaToken;
return new TokenRange(javaToken, javaToken);
}
/** Get the token that starts the NodeList l */
static JavaToken nodeListBegin(NodeList<?> l) {
if (l.isEmpty()) {
return JavaToken.INVALID;
}
return l.get(0).getTokenRange().get().getBegin();
}
/**
* This is the code from ParseException.initialise, modified to be more horizontal.
*/
static String makeMessageForParseException(ParseException exception) {
final StringBuilder sb = new StringBuilder("Parse error. Found ");
final StringBuilder expected = new StringBuilder();
int maxExpectedTokenSequenceLength = 0;
TreeSet<String> sortedOptions = new TreeSet<>();
for (int i = 0; i < exception.expectedTokenSequences.length; i++) {
if (maxExpectedTokenSequenceLength < exception.expectedTokenSequences[i].length) {
maxExpectedTokenSequenceLength = exception.expectedTokenSequences[i].length;
}
for (int j = 0; j < exception.expectedTokenSequences[i].length; j++) {
sortedOptions.add(exception.tokenImage[exception.expectedTokenSequences[i][j]]);
}
}
for (String option : sortedOptions) {
expected.append(" ").append(option);
}
sb.append("");
Token token = exception.currentToken.next;
for (int i = 0; i < maxExpectedTokenSequenceLength; i++) {
String tokenText = token.image;
String escapedTokenText = ParseException.add_escapes(tokenText);
if (i != 0) {
sb.append(" ");
}
if (token.kind == 0) {
sb.append(exception.tokenImage[0]);
break;
}
escapedTokenText = "\"" + escapedTokenText + "\"";
String image = exception.tokenImage[token.kind];
if (image.equals(escapedTokenText)) {
sb.append(image);
} else {
sb.append(" ")
.append(escapedTokenText)
.append(" ")
.append(image);
}
token = token.next;
}
if (exception.expectedTokenSequences.length != 0) {
int numExpectedTokens = exception.expectedTokenSequences.length;
sb.append(", expected")
.append(numExpectedTokens == 1 ? "" : " one of ")
.append(expected.toString());
}
return sb.toString();
}
}
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