org.openrewrite.java.ReloadableJava8JavadocVisitor Maven / Gradle / Ivy
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/*
* Copyright 2021 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.openrewrite.java;
import com.sun.source.doctree.*;
import com.sun.source.tree.ArrayTypeTree;
import com.sun.source.tree.MemberSelectTree;
import com.sun.source.tree.ParameterizedTypeTree;
import com.sun.source.tree.PrimitiveTypeTree;
import com.sun.source.util.DocTreeScanner;
import com.sun.source.util.TreePath;
import com.sun.source.util.TreeScanner;
import com.sun.tools.javac.code.Symbol;
import com.sun.tools.javac.code.Type;
import com.sun.tools.javac.comp.Attr;
import com.sun.tools.javac.tree.DCTree;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.util.Context;
import org.jspecify.annotations.Nullable;
import org.openrewrite.Tree;
import org.openrewrite.internal.ListUtils;
import org.openrewrite.java.marker.LeadingBrace;
import org.openrewrite.java.tree.*;
import org.openrewrite.marker.Markers;
import java.util.*;
import java.util.stream.Collectors;
import static java.util.Collections.emptyList;
import static java.util.Collections.singletonList;
import static org.openrewrite.Tree.randomId;
import static org.openrewrite.internal.StringUtils.indexOfNextNonWhitespace;
import static org.openrewrite.java.tree.Space.EMPTY;
import static org.openrewrite.java.tree.Space.format;
public class ReloadableJava8JavadocVisitor extends DocTreeScanner> {
private final Attr attr;
private final Symbol.@Nullable TypeSymbol symbol;
@Nullable
private final Type enclosingClassType;
private final ReloadableJava8TypeMapping typeMapping;
private final TreeScanner javaVisitor = new JavaVisitor();
private final Map lineBreaks = new HashMap<>();
/**
* The whitespace on the first line terminated by a newline (if any)
*/
private String firstPrefix = "";
private String source;
private int cursor = 0;
public ReloadableJava8JavadocVisitor(Context context, TreePath scope, ReloadableJava8TypeMapping typeMapping, String source, JCTree tree) {
this.attr = Attr.instance(context);
this.typeMapping = typeMapping;
this.source = source;
if (scope.getLeaf() instanceof JCTree.JCCompilationUnit) {
this.enclosingClassType = tree.type;
this.symbol = ((JCTree.JCClassDecl) tree).sym;
} else {
com.sun.source.tree.Tree classDecl = scope.getLeaf();
if (classDecl instanceof JCTree.JCClassDecl) {
this.enclosingClassType = ((JCTree.JCClassDecl) classDecl).type;
this.symbol = ((JCTree.JCClassDecl) classDecl).sym;
} else if (classDecl instanceof JCTree.JCNewClass) {
this.enclosingClassType = ((JCTree.JCNewClass) classDecl).def.type;
this.symbol = ((JCTree.JCNewClass) classDecl).def.sym;
} else {
this.enclosingClassType = null;
this.symbol = null;
}
}
}
private void init() {
StringBuilder firstPrefixBuilder = new StringBuilder();
StringBuilder javadocContent = new StringBuilder();
StringBuilder marginBuilder = null;
boolean inFirstPrefix = true;
boolean isPrefixAsterisk = true;
// skip past the opening '/**'
int i = 3;
for (; i < source.length(); i++) {
char c = source.charAt(i);
if (inFirstPrefix) {
// '*' characters are considered a part of the margin until a non '*' is parsed.
if (Character.isWhitespace(c) || c == '*' && isPrefixAsterisk) {
if (isPrefixAsterisk && i + 1 <= source.length() - 1 && source.charAt(i + 1) != '*') {
isPrefixAsterisk = false;
}
firstPrefixBuilder.append(c);
} else {
firstPrefix = firstPrefixBuilder.toString();
inFirstPrefix = false;
}
}
if (c == '\r') {
continue;
}
if (c == '\n') {
char prev = source.charAt(i - 1);
if (inFirstPrefix) {
firstPrefix = firstPrefixBuilder.toString();
inFirstPrefix = false;
} else {
// Handle consecutive new lines.
if ((prev == '\n' ||
prev == '\r' && source.charAt(i - 2) == '\n')) {
String prevLineLine = prev == '\n' ? "\n" : "\r\n";
lineBreaks.put(javadocContent.length(), new Javadoc.LineBreak(randomId(), prevLineLine, Markers.EMPTY));
} else if (marginBuilder != null) { // A new line with no '*' that only contains whitespace.
String newLine = prev == '\r' ? "\r\n" : "\n";
lineBreaks.put(javadocContent.length(), new Javadoc.LineBreak(randomId(), newLine, Markers.EMPTY));
javadocContent.append(marginBuilder.substring(marginBuilder.indexOf("\n") + 1));
}
javadocContent.append(c);
}
String newLine = prev == '\r' ? "\r\n" : "\n";
marginBuilder = new StringBuilder(newLine);
} else if (marginBuilder != null) {
if (!Character.isWhitespace(c)) {
if (c == '*') {
// '*' characters are considered a part of the margin until a non '*' is parsed.
marginBuilder.append(c);
if (i + 1 <= source.length() - 1 && source.charAt(i + 1) != '*') {
lineBreaks.put(javadocContent.length(), new Javadoc.LineBreak(randomId(),
marginBuilder.toString(), Markers.EMPTY));
marginBuilder = null;
}
} else {
if (c == '@') {
lineBreaks.put(javadocContent.length(), new Javadoc.LineBreak(randomId(),
marginBuilder.toString(), Markers.EMPTY));
javadocContent.append(c);
} else {
String newLine = marginBuilder.charAt(0) == '\r' ? "\r\n" : "\n";
lineBreaks.put(javadocContent.length(), new Javadoc.LineBreak(randomId(),
newLine, Markers.EMPTY));
String margin = marginBuilder.toString();
javadocContent.append(margin.substring(margin.indexOf("\n") + 1)).append(c);
}
marginBuilder = null;
}
} else {
marginBuilder.append(c);
}
} else if (!inFirstPrefix) {
javadocContent.append(c);
}
}
if (inFirstPrefix) {
javadocContent.append(firstPrefixBuilder);
}
source = javadocContent.toString();
if (marginBuilder != null && marginBuilder.length() > 0) {
if (javadocContent.length() > 0 && javadocContent.charAt(0) != '\n') {
lineBreaks.put(javadocContent.length(), new Javadoc.LineBreak(randomId(),
marginBuilder.toString(), Markers.EMPTY));
source = source.substring(0, source.length() - 1); // strip trailing newline
} else {
lineBreaks.put(source.length(), new Javadoc.LineBreak(randomId(),
marginBuilder.toString(), Markers.EMPTY));
}
}
}
@Override
public Tree visitAttribute(AttributeTree node, List body) {
String name = node.getName().toString();
cursor += name.length();
List beforeEqual;
List value;
if (node.getValueKind() == AttributeTree.ValueKind.EMPTY) {
beforeEqual = emptyList();
value = emptyList();
} else {
beforeEqual = new ArrayList<>();
value = new ArrayList<>();
Javadoc.LineBreak lineBreak;
while ((lineBreak = lineBreaks.remove(cursor + 1)) != null) {
cursor++;
beforeEqual.add(lineBreak);
}
String whitespaceBeforeEqual = whitespaceBeforeAsString();
beforeEqual.add(new Javadoc.Text(randomId(), Markers.EMPTY, whitespaceBeforeEqual));
sourceBefore("=");
while ((lineBreak = lineBreaks.remove(cursor + 1)) != null) {
cursor++;
value.add(lineBreak);
}
switch (node.getValueKind()) {
case UNQUOTED:
value.addAll(convertMultiline(node.getValue()));
break;
case SINGLE:
value.addAll(sourceBefore("'"));
value.add(new Javadoc.Text(randomId(), Markers.EMPTY, "'"));
value.addAll(convertMultiline(node.getValue()));
value.addAll(sourceBefore("'"));
value.add(new Javadoc.Text(randomId(), Markers.EMPTY, "'"));
break;
case DOUBLE:
default:
value.addAll(sourceBefore("\""));
value.add(new Javadoc.Text(randomId(), Markers.EMPTY, "\""));
value.addAll(convertMultiline(node.getValue()));
value.addAll(sourceBefore("\""));
value.add(new Javadoc.Text(randomId(), Markers.EMPTY, "\""));
break;
}
}
return new Javadoc.Attribute(
randomId(),
Markers.EMPTY,
name,
beforeEqual,
value
);
}
@Override
public Tree visitAuthor(AuthorTree node, List body) {
body.addAll(sourceBefore("@author"));
return new Javadoc.Author(randomId(), Markers.EMPTY, convertMultiline(node.getName()));
}
@Override
public Tree visitComment(CommentTree node, List body) {
cursor += node.getBody().length();
return new Javadoc.Text(randomId(), Markers.EMPTY, node.getBody());
}
@Override
public Tree visitDeprecated(DeprecatedTree node, List body) {
body.addAll(sourceBefore("@deprecated"));
return new Javadoc.Deprecated(randomId(), Markers.EMPTY, convertMultiline(node.getBody()));
}
@Override
public Tree visitDocComment(DocCommentTree node, List body) {
init();
Javadoc.LineBreak leadingLineBreak = lineBreaks.remove(0);
if (leadingLineBreak != null) {
if (!firstPrefix.isEmpty()) {
body.add(new Javadoc.Text(randomId(), Markers.EMPTY, firstPrefix.substring(0, firstPrefix.length() - (firstPrefix.endsWith("\r\n") ? 2 : 1))));
firstPrefix = "";
}
body.add(leadingLineBreak);
}
if (!firstPrefix.isEmpty()) {
body.add(new Javadoc.Text(randomId(), Markers.EMPTY, firstPrefix));
}
List firstSentence = node.getFirstSentence();
for (int i = 0; i < firstSentence.size(); i++) {
DocTree docTree = firstSentence.get(i);
if (!(docTree instanceof DCTree.DCText && i > 0)) {
body.addAll(whitespaceBefore());
}
if (docTree instanceof DCTree.DCText) {
body.addAll(visitText(((DCTree.DCText) docTree).getBody()));
} else {
body.add((Javadoc) scan(docTree, body));
}
}
List restOfBody = node.getBody();
for (int i = 0; i < restOfBody.size(); i++) {
DocTree docTree = restOfBody.get(i);
if (!(docTree instanceof DCTree.DCText && i > 0)) {
body.addAll(whitespaceBefore());
}
if (docTree instanceof DCTree.DCText) {
body.addAll(visitText(((DCTree.DCText) docTree).getBody()));
} else {
body.add((Javadoc) scan(docTree, whitespaceBefore()));
}
}
Javadoc.LineBreak lineBreak;
for (DocTree blockTag : node.getBlockTags()) {
spaceBeforeTags:
while (true) {
if ((lineBreak = lineBreaks.remove(cursor + 1)) != null) {
cursor++;
body.add(lineBreak);
}
StringBuilder whitespaceBeforeNewLine = new StringBuilder();
for (int j = cursor; j < source.length(); j++) {
char ch = source.charAt(j);
if (ch == '\r') {
cursor++;
continue;
}
if (ch == '\n') {
if (whitespaceBeforeNewLine.length() > 0) {
body.add(new Javadoc.Text(randomId(), Markers.EMPTY, whitespaceBeforeNewLine.toString()));
}
cursor += whitespaceBeforeNewLine.length();
break;
} else if (Character.isWhitespace(ch)) {
whitespaceBeforeNewLine.append(ch);
} else {
if (whitespaceBeforeNewLine.length() > 0) {
body.add(new Javadoc.Text(randomId(), Markers.EMPTY, whitespaceBeforeNewLine.toString()));
cursor += whitespaceBeforeNewLine.length();
}
break spaceBeforeTags;
}
}
if (lineBreak == null) {
break;
}
}
body.addAll(whitespaceBefore());
body.addAll(convertMultiline(singletonList(blockTag)));
}
// The javadoc ends with trailing whitespace.
if (cursor < source.length()) {
String trailingWhitespace = source.substring(cursor);
if (trailingWhitespace.contains("\n")) {
// 1 or more newlines.
String[] parts = trailingWhitespace.split("\n");
for (String part : parts) {
// Add trailing whitespace for each new line.
if (!part.isEmpty()) {
body.add(new Javadoc.Text(randomId(), Markers.EMPTY, part));
}
// Add trailing linebreaks if they exist.
if (!lineBreaks.isEmpty()) {
int pos = Collections.min(lineBreaks.keySet());
if (lineBreaks.containsKey(pos)) {
body.add(lineBreaks.get(pos));
lineBreaks.remove(pos);
}
}
}
} else {
// The Javadoc ends with trailing whitespace.
body.add(new Javadoc.Text(randomId(), Markers.EMPTY, trailingWhitespace));
}
}
if (!lineBreaks.isEmpty()) {
lineBreaks.keySet().stream().sorted().forEach(o -> body.add(lineBreaks.get(o)));
}
return new Javadoc.DocComment(randomId(), Markers.EMPTY, body, "");
}
@Override
public Tree visitDocRoot(DocRootTree node, List body) {
body.addAll(sourceBefore("{@docRoot"));
return new Javadoc.DocRoot(
randomId(),
Markers.EMPTY,
endBrace()
);
}
@Override
public Tree visitEndElement(EndElementTree node, List body) {
body.addAll(sourceBefore("")
);
}
@Override
public Tree visitEntity(EntityTree node, List body) {
body.addAll(sourceBefore("&"));
cursor += node.getName().length() + 1;
return new Javadoc.Text(randomId(), Markers.EMPTY, "&" + node.getName().toString() + ";");
}
@Override
public Tree visitErroneous(ErroneousTree node, List body) {
return new Javadoc.Erroneous(randomId(), Markers.EMPTY, visitText(node.getBody()));
}
@Override
public J.Identifier visitIdentifier(com.sun.source.doctree.IdentifierTree node, List body) {
String name = node.getName().toString();
sourceBefore(name);
return new J.Identifier(
randomId(),
Space.EMPTY,
Markers.EMPTY,
emptyList(),
name,
null,
null
);
}
@Override
public Tree visitInheritDoc(InheritDocTree node, List body) {
body.addAll(sourceBefore("{@inheritDoc"));
return new Javadoc.InheritDoc(
randomId(),
Markers.EMPTY,
endBrace()
);
}
@Override
public Tree visitLink(LinkTree node, List body) {
body.addAll(sourceBefore(node.getKind() == DocTree.Kind.LINK ? "{@link" : "{@linkplain"));
List spaceBeforeRef = whitespaceBefore();
Javadoc.Reference reference = null;
J ref = visitReference(node.getReference(), body);
//noinspection ConstantConditions
if (ref != null) {
reference = new Javadoc.Reference(randomId(), Markers.EMPTY, ref, lineBreaksInMultilineJReference());
}
List label = convertMultiline(node.getLabel());
return new Javadoc.Link(
randomId(),
Markers.EMPTY,
node.getKind() != DocTree.Kind.LINK,
spaceBeforeRef,
null,
reference,
label,
endBrace()
);
}
@Override
public Tree visitLiteral(LiteralTree node, List body) {
body.addAll(sourceBefore(node.getKind() == DocTree.Kind.CODE ? "{@code" : "{@literal"));
List description = whitespaceBefore();
description.addAll(visitText(node.getBody().getBody()));
return new Javadoc.Literal(
randomId(),
Markers.EMPTY,
node.getKind() == DocTree.Kind.CODE,
description,
endBrace()
);
}
@Override
public Tree visitParam(ParamTree node, List body) {
body.addAll(sourceBefore("@param"));
DCTree.DCParam param = (DCTree.DCParam) node;
List spaceBefore;
J typeName;
if (param.isTypeParameter) {
spaceBefore = sourceBefore("<");
String beforeName = whitespaceBeforeAsString();
Space namePrefix = beforeName.isEmpty() ? Space.EMPTY : Space.build(beforeName, emptyList());
typeName = new J.TypeParameter(
randomId(),
Space.EMPTY,
Markers.EMPTY,
emptyList(),
emptyList(),
visitIdentifier(node.getName(), whitespaceBefore()).withPrefix(namePrefix),
null
);
// The node will not be considered a type parameter if whitespace exists before `>`.
sourceBefore(">");
} else {
spaceBefore = whitespaceBefore();
typeName = (J) scan(node.getName(), body);
}
List beforeReference = lineBreaksInMultilineJReference();
Javadoc.Reference reference = new Javadoc.Reference(randomId(), Markers.EMPTY, typeName, beforeReference);
return new Javadoc.Parameter(
randomId(),
Markers.EMPTY,
spaceBefore,
null,
reference,
convertMultiline(param.getDescription())
);
}
@Override
public J visitReference(@Nullable ReferenceTree node, List body) {
DCTree.DCReference ref = (DCTree.DCReference) node;
if (node == null) {
//noinspection ConstantConditions
return null;
}
JavaType qualifierType;
TypedTree qualifier;
if (ref.qualifierExpression != null) {
try {
attr.attribType(ref.qualifierExpression, symbol);
} catch(NullPointerException ignored) {
// best effort, can result in:
// java.lang.NullPointerException: Cannot read field "info" because "env" is null
// at com.sun.tools.javac.comp.Attr.attribType(Attr.java:404)
}
}
if(ref.qualifierExpression != null) {
qualifier = (TypedTree) javaVisitor.scan(ref.qualifierExpression, Space.EMPTY);
qualifierType = qualifier.getType();
if (ref.memberName != null) {
cursor++; // skip #
}
} else {
qualifierType = typeMapping.type(enclosingClassType);
if (source.charAt(cursor) == '#') {
qualifier = new J.Identifier(randomId(), Space.EMPTY, Markers.EMPTY, emptyList(), "", qualifierType, null);
cursor++;
} else {
qualifier = null;
}
}
if (ref.memberName != null) {
J.Identifier name = new J.Identifier(
randomId(),
Space.EMPTY,
Markers.EMPTY,
emptyList(),
ref.memberName.toString(),
null,
null
);
cursor += ref.memberName.toString().length();
JavaType.Method methodRefType = methodReferenceType(ref, qualifierType);
JavaType.Variable fieldRefType = methodRefType == null ?
fieldReferenceType(ref, qualifierType) : null;
if (ref.paramTypes != null) {
JContainer paramContainer;
sourceBeforeAsString("(");
if (ref.paramTypes.isEmpty()) {
paramContainer = JContainer.build(
Space.EMPTY,
singletonList(JRightPadded.build(new J.Empty(randomId(),
Space.build(sourceBeforeAsString(")"), emptyList()), Markers.EMPTY))),
Markers.EMPTY
);
} else {
List> parameters = new ArrayList<>(ref.paramTypes.size());
List paramTypes = ref.paramTypes;
for (int i = 0; i < paramTypes.size(); i++) {
JCTree param = paramTypes.get(i);
Expression paramExpr = (Expression) javaVisitor.scan(param, Space.build(whitespaceBeforeAsString(), emptyList()));
Space rightFmt = Space.format(i == paramTypes.size() - 1 ?
sourceBeforeAsString(")") : sourceBeforeAsString(","));
parameters.add(new JRightPadded<>(paramExpr, rightFmt, Markers.EMPTY));
}
paramContainer = JContainer.build(
Space.EMPTY,
parameters,
Markers.EMPTY
);
}
return new J.MethodInvocation(
randomId(),
qualifier == null ? Space.EMPTY : qualifier.getPrefix(),
Markers.EMPTY,
qualifier == null ? null : JRightPadded.build(qualifier.withPrefix(Space.EMPTY)),
null,
name,
paramContainer,
methodRefType
);
} else {
return new J.MemberReference(
randomId(),
qualifier == null ? Space.EMPTY : qualifier.getPrefix(),
Markers.EMPTY,
qualifier == null ? null : JRightPadded.build(qualifier.withPrefix(Space.EMPTY)),
JContainer.empty(),
JLeftPadded.build(name),
null,
methodRefType,
fieldRefType
);
}
}
assert qualifier != null;
return qualifier;
}
private JavaType.@Nullable Method methodReferenceType(DCTree.DCReference ref, @Nullable JavaType type) {
JavaType.Class classType = TypeUtils.asClass(type);
if (classType == null) {
return null;
}
nextMethod:
for (JavaType.Method method : classType.getMethods()) {
if (method.getName().equals(ref.memberName.toString())) {
if (ref.paramTypes != null) {
for (JCTree param : ref.paramTypes) {
for (JavaType testParamType : method.getParameterTypes()) {
Type paramType = attr.attribType(param, symbol);
if (testParamType instanceof JavaType.GenericTypeVariable) {
List bounds = ((JavaType.GenericTypeVariable) testParamType).getBounds();
if (bounds.isEmpty() && paramType.tsym != null && "java.lang.Object".equals(paramType.tsym.getQualifiedName().toString())) {
return method;
}
for (JavaType bound : bounds) {
if (paramTypeMatches(bound, paramType)) {
return method;
}
}
continue nextMethod;
}
if (paramTypeMatches(testParamType, paramType)) {
continue nextMethod;
}
}
}
}
return method;
}
}
// a member reference, but not matching anything on type attribution
return null;
}
private boolean paramTypeMatches(JavaType testParamType, Type paramType) {
if (paramType instanceof Type.ClassType) {
JavaType.FullyQualified fqTestParamType = TypeUtils.asFullyQualified(testParamType);
return fqTestParamType == null || !fqTestParamType.getFullyQualifiedName().equals(((Symbol.ClassSymbol) paramType.tsym)
.fullname.toString());
}
return false;
}
private JavaType.@Nullable Variable fieldReferenceType(DCTree.DCReference ref, @Nullable JavaType type) {
JavaType.Class classType = TypeUtils.asClass(type);
if (classType == null) {
return null;
}
for (JavaType.Variable member : classType.getMembers()) {
if (member.getName().equals(ref.memberName.toString())) {
return member;
}
}
// a member reference, but not matching anything on type attribution
return null;
}
@Override
public Tree visitReturn(ReturnTree node, List body) {
List before;
Markers markers = Markers.EMPTY;
if (source.startsWith("{", cursor)) {
markers = markers.addIfAbsent(new LeadingBrace(Tree.randomId()));
before = sourceBefore("{@return");
} else {
before = sourceBefore("@return");
}
body.addAll(before);
return new Javadoc.Return(randomId(), markers, convertMultiline(node.getDescription()));
}
@Override
public Tree visitSee(SeeTree node, List body) {
body.addAll(sourceBefore("@see"));
Javadoc.Reference reference = null;
J ref;
List spaceBeforeTree = whitespaceBefore();
List docs;
if (node.getReference().get(0) instanceof DCTree.DCReference) {
ref = visitReference((ReferenceTree) node.getReference().get(0), body);
//noinspection ConstantConditions
if (ref != null) {
reference = new Javadoc.Reference(randomId(), Markers.EMPTY, ref, lineBreaksInMultilineJReference());
}
docs = convertMultiline(node.getReference().subList(1, node.getReference().size()));
} else {
docs = convertMultiline(node.getReference());
}
return new Javadoc.See(randomId(), Markers.EMPTY, spaceBeforeTree, null, reference, docs);
}
@Override
public Tree visitSerial(SerialTree node, List body) {
body.addAll(sourceBefore("@serial"));
return new Javadoc.Serial(randomId(), Markers.EMPTY, convertMultiline(node.getDescription()));
}
@Override
public Tree visitSerialData(SerialDataTree node, List body) {
body.addAll(sourceBefore("@serialData"));
return new Javadoc.SerialData(randomId(), Markers.EMPTY, convertMultiline(node.getDescription()));
}
@Override
public Tree visitSerialField(SerialFieldTree node, List body) {
body.addAll(sourceBefore("@serialField"));
return new Javadoc.SerialField(randomId(), Markers.EMPTY,
visitIdentifier(node.getName(), whitespaceBefore()),
visitReference(node.getType(), whitespaceBefore()),
convertMultiline(node.getDescription())
);
}
@Override
public Tree visitSince(SinceTree node, List body) {
body.addAll(sourceBefore("@since"));
return new Javadoc.Since(randomId(), Markers.EMPTY, convertMultiline(node.getBody()));
}
@Override
public Tree visitStartElement(StartElementTree node, List body) {
body.addAll(sourceBefore("<"));
String name = node.getName().toString();
cursor += name.length();
return new Javadoc.StartElement(
randomId(),
Markers.EMPTY,
name,
convertMultiline(node.getAttributes()),
node.isSelfClosing(),
node.isSelfClosing() ? sourceBefore("/>") : sourceBefore(">")
);
}
@Override
public Tree visitVersion(VersionTree node, List body) {
body.addAll(sourceBefore("@version"));
return new Javadoc.Version(randomId(), Markers.EMPTY, convertMultiline(node.getBody()));
}
@Override
public Tree visitText(TextTree node, List body) {
throw new UnsupportedOperationException("Anywhere text can occur, we need to call the visitText override that " +
"returns a list of Javadoc elements.");
}
public List visitText(String node) {
List texts = new ArrayList<>();
if (!node.isEmpty() && Character.isWhitespace(node.charAt(0)) &&
!Character.isWhitespace(source.charAt(cursor))) {
int i = 0;
for (; i < node.length() && Character.isWhitespace(node.charAt(i)); i++) {
}
node = node.substring(i);
}
StringBuilder text = new StringBuilder();
for (int i = 0; i < node.length(); i++) {
char c = node.charAt(i);
cursor++;
if (c == '\n') {
if (text.length() > 0) {
texts.add(new Javadoc.Text(randomId(), Markers.EMPTY, text.toString()));
text = new StringBuilder();
}
Javadoc.LineBreak lineBreak = lineBreaks.remove(cursor);
assert lineBreak != null;
texts.add(lineBreak);
} else {
text.append(c);
}
}
if (text.length() > 0) {
texts.add(new Javadoc.Text(randomId(), Markers.EMPTY, text.toString()));
}
return texts;
}
@Override
public Tree visitThrows(ThrowsTree node, List body) {
boolean throwsKeyword = source.startsWith("@throws", cursor);
sourceBefore(throwsKeyword ? "@throws" : "@exception");
List spaceBeforeExceptionName = whitespaceBefore();
return new Javadoc.Throws(
randomId(),
Markers.EMPTY,
throwsKeyword,
spaceBeforeExceptionName,
visitReference(node.getExceptionName(), body),
convertMultiline(node.getDescription())
);
}
@Override
public Tree visitUnknownBlockTag(UnknownBlockTagTree node, List body) {
body.addAll(sourceBefore("@" + node.getTagName()));
return new Javadoc.UnknownBlock(
randomId(),
Markers.EMPTY,
node.getTagName(),
convertMultiline(node.getContent())
);
}
@Override
public Tree visitUnknownInlineTag(UnknownInlineTagTree node, List body) {
body.addAll(sourceBefore("{@" + node.getTagName()));
return new Javadoc.UnknownInline(
randomId(),
Markers.EMPTY,
node.getTagName(),
convertMultiline(node.getContent()),
endBrace()
);
}
@Override
public Tree visitValue(ValueTree node, List body) {
body.addAll(sourceBefore("{@value"));
return new Javadoc.InlinedValue(
randomId(),
Markers.EMPTY,
whitespaceBefore(),
node.getReference() == null ? null : visitReference(node.getReference(), body),
endBrace()
);
}
private String sourceBeforeAsString(String delim) {
if (cursor >= source.length()) {
return "";
}
int endIndex = source.indexOf(delim, cursor);
if (endIndex < 0) {
throw new IllegalStateException("Expected to be able to find " + delim);
}
String prefix = source.substring(cursor, endIndex);
cursor = endIndex + delim.length();
return prefix;
}
private List sourceBefore(String delim) {
if (cursor >= source.length()) {
return emptyList();
}
int endIndex = source.indexOf(delim, cursor);
if (endIndex < 0) {
throw new IllegalStateException("Expected to be able to find " + delim);
}
List before = whitespaceBefore();
cursor += delim.length();
return before;
}
private String whitespaceBeforeAsString() {
if (cursor >= source.length()) {
return "";
}
int i = cursor;
for (; i < source.length(); i++) {
if (!Character.isWhitespace(source.charAt(i))) {
break;
}
}
String fmt = source.substring(cursor, i);
cursor = i;
return fmt;
}
private List whitespaceBefore() {
if (cursor >= source.length()) {
return emptyList();
}
List whitespace = new ArrayList<>();
Javadoc.LineBreak lineBreak;
while ((lineBreak = lineBreaks.remove(cursor + 1)) != null) {
cursor++;
whitespace.add(lineBreak);
}
StringBuilder space = new StringBuilder();
for (; cursor < source.length() && Character.isWhitespace(source.charAt(cursor)); cursor++) {
char c = source.charAt(cursor);
if (c == '\n') {
if (space.length() > 0) {
whitespace.add(new Javadoc.Text(randomId(), Markers.EMPTY, space.toString()));
}
space = new StringBuilder();
lineBreak = lineBreaks.remove(cursor + 1);
assert lineBreak != null;
whitespace.add(lineBreak);
} else {
space.append(c);
}
}
if (space.length() > 0) {
whitespace.add(new Javadoc.Text(randomId(), Markers.EMPTY, space.toString()));
}
return whitespace;
}
private List endBrace() {
if (cursor < source.length()) {
int tempCursor = cursor;
List end = whitespaceBefore();
if (cursor < source.length() && source.charAt(cursor) == '}') {
end = ListUtils.concat(end, new Javadoc.Text(randomId(), Markers.EMPTY, "}"));
cursor++;
return end;
} else {
cursor = tempCursor;
}
}
return emptyList();
}
private List convertMultiline(List dts) {
List js = new ArrayList<>(dts.size());
Javadoc.LineBreak lineBreak;
while ((lineBreak = lineBreaks.remove(cursor + 1)) != null) {
cursor++;
js.add(lineBreak);
}
for (int i = 0; i < dts.size(); i++) {
DocTree dt = dts.get(i);
if (i > 0 && dt instanceof DCTree.DCText) {
// the whitespace is part of the text
js.addAll(visitText(((DCTree.DCText) dt).getBody()));
} else {
while ((lineBreak = lineBreaks.remove(cursor + 1)) != null) {
cursor++;
js.add(lineBreak);
}
js.addAll(whitespaceBefore());
if (dt instanceof DCTree.DCText) {
js.addAll(visitText(((DCTree.DCText) dt).getBody()));
} else {
js.add((Javadoc) scan(dt, emptyList()));
}
}
}
return js;
}
/**
* A {@link J} may contain new lines in each {@link Space} and each new line will have a corresponding
* {@link org.openrewrite.java.tree.Javadoc.LineBreak}.
*
* This method collects the linebreaks associated to new lines in a Space, and removes the applicable linebreaks
* from the map.
*/
private List lineBreaksInMultilineJReference() {
List linebreakIndexes = lineBreaks.keySet().stream()
.filter(o -> o <= cursor)
.collect(Collectors.toList());
List referenceLineBreaks = linebreakIndexes.stream()
.sorted()
.map(lineBreaks::get)
.collect(Collectors.toList());
for (Integer key : linebreakIndexes) {
lineBreaks.remove(key);
}
return referenceLineBreaks;
}
class JavaVisitor extends TreeScanner {
@Override
public J visitMemberSelect(MemberSelectTree node, Space fmt) {
JCTree.JCFieldAccess fieldAccess = (JCTree.JCFieldAccess) node;
Expression selected = (Expression) scan(fieldAccess.selected, Space.EMPTY);
sourceBefore(".");
cursor += fieldAccess.name.toString().length();
return new J.FieldAccess(randomId(), fmt, Markers.EMPTY,
selected,
JLeftPadded.build(new J.Identifier(randomId(),
Space.EMPTY,
Markers.EMPTY,
emptyList(), fieldAccess.name.toString(), null, null)),
typeMapping.type(node));
}
@Override
public J visitIdentifier(com.sun.source.tree.IdentifierTree node, Space fmt) {
String name = node.getName().toString();
cursor += name.length();
JavaType type = typeMapping.type(node);
return new J.Identifier(randomId(), fmt, Markers.EMPTY, emptyList(), name, type, null);
}
@Override
public J visitPrimitiveType(PrimitiveTypeTree node, Space fmt) {
JCTree.JCPrimitiveTypeTree primitiveType = (JCTree.JCPrimitiveTypeTree) node;
String name = primitiveType.toString();
cursor += name.length();
return new J.Identifier(randomId(), fmt, Markers.EMPTY, emptyList(), name, typeMapping.primitive(primitiveType.typetag), null);
}
@Override
public J visitArrayType(ArrayTypeTree node, Space fmt) {
TypeTree elemType = (TypeTree) scan(node.getType(), Space.EMPTY);
int saveCursor = cursor;
Space before = whitespace();
JLeftPadded dimension;
if (source.startsWith("[", cursor)) {
cursor++;
dimension = JLeftPadded.build(Space.build(sourceBeforeAsString("]"), emptyList())).withBefore(before);
} else {
cursor = saveCursor;
return elemType.withPrefix(fmt);
}
return new J.ArrayType(
randomId(),
fmt,
Markers.EMPTY,
elemType,
null,
dimension,
typeMapping.type(node)
);
}
private Space whitespace() {
int nextNonWhitespace = indexOfNextNonWhitespace(cursor, source);
if (nextNonWhitespace == cursor) {
return EMPTY;
}
Space space = format(source, cursor, nextNonWhitespace);
cursor = nextNonWhitespace;
return space;
}
@Override
public J visitParameterizedType(ParameterizedTypeTree node, Space fmt) {
NameTree id = (NameTree) javaVisitor.scan(node.getType(), Space.EMPTY);
List> expressions = new ArrayList<>(node.getTypeArguments().size());
cursor += 1; // skip '<', JavaDocVisitor does not interpret List as Parameterized.
int argsSize = node.getTypeArguments().size();
for (int i = 0; i < argsSize; i++) {
Space space = Space.build(whitespaceBeforeAsString(), emptyList());
JRightPadded expression = JRightPadded.build((Expression) javaVisitor.scan(node.getTypeArguments().get(i), space));
Space after;
if (i == argsSize - 1) {
after = Space.build(sourceBeforeAsString(">"), emptyList());
} else {
after = Space.build(sourceBeforeAsString(","), emptyList());
}
expression = expression.withAfter(after);
expressions.add(expression);
}
return new J.ParameterizedType(randomId(), fmt, Markers.EMPTY, id, JContainer.build(expressions), typeMapping.type(node));
}
}
}