org.openrewrite.python.internal.PythonPrinter Maven / Gradle / Ivy
/*
* Copyright 2023 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.python.internal;
import org.jspecify.annotations.Nullable;
import org.openrewrite.Cursor;
import org.openrewrite.PrintOutputCapture;
import org.openrewrite.Tree;
import org.openrewrite.java.JavaPrinter;
import org.openrewrite.java.marker.OmitParentheses;
import org.openrewrite.java.marker.Semicolon;
import org.openrewrite.java.marker.TrailingComma;
import org.openrewrite.java.tree.*;
import org.openrewrite.java.tree.J.Import;
import org.openrewrite.java.tree.Space.Location;
import org.openrewrite.marker.Marker;
import org.openrewrite.marker.Markers;
import org.openrewrite.python.PythonVisitor;
import org.openrewrite.python.marker.KeywordArguments;
import org.openrewrite.python.marker.KeywordOnlyArguments;
import org.openrewrite.python.marker.SuppressNewline;
import org.openrewrite.python.tree.*;
import java.util.Iterator;
import java.util.List;
import java.util.function.UnaryOperator;
import static java.util.Objects.requireNonNull;
public class PythonPrinter
extends PythonVisitor> {
private final PythonJavaPrinter delegate = new PythonJavaPrinter();
@Override
public J visit(@Nullable Tree tree, PrintOutputCapture p) {
if (!(tree instanceof Py)) {
// re-route printing to the Java printer
return delegate.visitNonNull(requireNonNull(tree), p);
} else {
//noinspection DataFlowIssue
return super.visit(tree, p);
}
}
@Override
public void setCursor(@Nullable Cursor cursor) {
super.setCursor(cursor);
delegate.internalSetCursor(cursor);
}
private void internalSetCursor(@Nullable Cursor cursor) {
super.setCursor(cursor);
}
@Override
public J visitCompilationUnit(Py.CompilationUnit cu, PrintOutputCapture
p) {
beforeSyntax(cu, Location.COMPILATION_UNIT_PREFIX, p);
for (JRightPadded anImport : cu.getPadding().getImports()) {
visitRightPadded(anImport, PyRightPadded.Location.TOP_LEVEL_STATEMENT_SUFFIX, p);
}
for (JRightPadded statement : cu.getPadding().getStatements()) {
visitRightPadded(statement, PyRightPadded.Location.TOP_LEVEL_STATEMENT_SUFFIX, p);
}
visitSpace(cu.getEof(), Location.COMPILATION_UNIT_EOF, p);
if (cu.getMarkers().findFirst(SuppressNewline.class).isPresent()) {
if (lastCharIs(p, '\n')) {
p.out.setLength(p.out.length() - 1);
}
}
afterSyntax(cu, p);
return cu;
}
@Override
public J visitBinary(Py.Binary binary, PrintOutputCapture p) {
beforeSyntax(binary, PySpace.Location.BINARY_PREFIX, p);
visit(binary.getLeft(), p);
visitSpace(binary.getPadding().getOperator().getBefore(), PySpace.Location.BINARY_OPERATOR, p);
switch (binary.getOperator()) {
case NotIn:
p.append("not");
if (binary.getNegation() != null) {
visitSpace(binary.getNegation(), PySpace.Location.BINARY_NEGATION, p);
} else {
p.append(' ');
}
p.append("in");
break;
case In:
p.append("in");
break;
case Is:
p.append("is");
break;
case IsNot:
p.append("is");
if (binary.getNegation() != null) {
visitSpace(binary.getNegation(), PySpace.Location.BINARY_NEGATION, p);
} else {
p.append(' ');
}
p.append("not");
break;
case FloorDivision:
p.append("//");
break;
case Power:
p.append("**");
break;
}
visit(binary.getRight(), p);
afterSyntax(binary, p);
return binary;
}
@Override
public J visitCollectionLiteral(Py.CollectionLiteral coll, PrintOutputCapture
p) {
beforeSyntax(coll, PySpace.Location.COLLECTION_LITERAL_PREFIX, p);
JContainer elements = coll.getPadding().getElements();
switch (coll.getKind()) {
case LIST:
visitContainer("[", elements, PyContainer.Location.COLLECTION_LITERAL_ELEMENTS, ",", "]", p);
break;
case SET:
visitContainer("{", elements, PyContainer.Location.COLLECTION_LITERAL_ELEMENTS, ",", "}", p);
break;
case TUPLE:
if (elements.getMarkers().findFirst(OmitParentheses.class).isPresent()) {
visitContainer("", elements, PyContainer.Location.COLLECTION_LITERAL_ELEMENTS, ",", "", p);
} else {
visitContainer("(", elements, PyContainer.Location.COLLECTION_LITERAL_ELEMENTS, ",", ")", p);
}
break;
}
afterSyntax(coll, p);
return coll;
}
@Override
public J visitDictLiteral(Py.DictLiteral dict, PrintOutputCapture p) {
beforeSyntax(dict, PySpace.Location.DICT_LITERAL_PREFIX, p);
visitContainer("{", dict.getPadding().getElements(), PyContainer.Location.DICT_LITERAL_ELEMENTS, ",", "}", p);
afterSyntax(dict, p);
return dict;
}
@Override
public J visitFormattedString(Py.FormattedString fString, PrintOutputCapture
p) {
beforeSyntax(fString, PySpace.Location.FORMATTED_STRING_PREFIX, p);
p.append(fString.getDelimiter());
visit(fString.getParts(), p);
if (!fString.getDelimiter().isEmpty()) {
int idx = Math.max(fString.getDelimiter().indexOf('\''), fString.getDelimiter().indexOf('"'));
p.append(fString.getDelimiter().substring(idx));
}
return fString;
}
@Override
public J visitFormattedStringValue(Py.FormattedString.Value value, PrintOutputCapture
p) {
beforeSyntax(value, PySpace.Location.FORMATTED_STRING_VALUE_PREFIX, p);
p.append('{');
visitRightPadded(value.getPadding().getExpression(), PyRightPadded.Location.FORMATTED_STRING_VALUE_EXPRESSION, p);
if (value.getPadding().getDebug() != null) {
p.append('=');
visitSpace(value.getPadding().getDebug().getAfter(), PySpace.Location.FORMATTED_STRING_VALUE_DEBUG_SUFFIX, p);
}
if (value.getConversion() != null) {
p.append('!');
switch (value.getConversion()) {
case STR:
p.append('s');
break;
case REPR:
p.append('r');
break;
case ASCII:
p.append('a');
break;
}
}
if (value.getFormat() != null) {
p.append(':');
visit(value.getFormat(), p);
}
p.append('}');
return value;
}
@Override
public J visitMultiImport(Py.MultiImport multiImport_, PrintOutputCapture
p) {
beforeSyntax(multiImport_, PySpace.Location.MULTI_IMPORT_PREFIX, p);
if (multiImport_.getFrom() != null) {
p.append("from");
visitRightPadded(multiImport_.getPadding().getFrom(), PyRightPadded.Location.MULTI_IMPORT_FROM, p);
}
p.append("import");
if (multiImport_.isParenthesized()) {
visitContainer("(", multiImport_.getPadding().getNames(), PyContainer.Location.MULTI_IMPORT_NAMES, ",", ")", p);
} else {
visitContainer("", multiImport_.getPadding().getNames(), PyContainer.Location.MULTI_IMPORT_NAMES, ",", "", p);
}
afterSyntax(multiImport_, p);
return multiImport_;
}
@Override
public J visitKeyValue(Py.KeyValue keyValue, PrintOutputCapture
p) {
beforeSyntax(keyValue, PySpace.Location.KEY_VALUE_PREFIX, p);
visitRightPadded(keyValue.getPadding().getKey(), PyRightPadded.Location.KEY_VALUE_KEY_SUFFIX, p);
p.append(':');
visit(keyValue.getValue(), p);
afterSyntax(keyValue, p);
return keyValue;
}
@Override
public J visitPass(Py.Pass pass, PrintOutputCapture
p) {
beforeSyntax(pass, PySpace.Location.PASS_PREFIX, p);
p.append("pass");
afterSyntax(pass, p);
return pass;
}
@Override
public J visitComprehensionExpression(Py.ComprehensionExpression comp, PrintOutputCapture
p) {
beforeSyntax(comp, PySpace.Location.COMPREHENSION_PREFIX, p);
String open;
String close;
switch (comp.getKind()) {
case DICT:
case SET:
open = "{";
close = "}";
break;
case LIST:
open = "[";
close = "]";
break;
case GENERATOR:
if (comp.getMarkers().findFirst(OmitParentheses.class).isPresent()) {
open = "";
close = "";
} else {
open = "(";
close = ")";
}
break;
default:
throw new IllegalStateException();
}
p.append(open);
visit(comp.getResult(), p);
for (Py.ComprehensionExpression.Clause clause : comp.getClauses()) {
visit(clause, p);
}
visitSpace(comp.getSuffix(), PySpace.Location.COMPREHENSION_SUFFIX, p);
p.append(close);
afterSyntax(comp, p);
return comp;
}
@Override
public J visitComprehensionClause(Py.ComprehensionExpression.Clause clause, PrintOutputCapture
p) {
visitSpace(clause.getPrefix(), PySpace.Location.COMPREHENSION_CLAUSE_PREFIX, p);
p.append("for");
visit(clause.getIteratorVariable(), p);
visitSpace(clause.getPadding().getIteratedList().getBefore(), PySpace.Location.COMPREHENSION_IN, p);
p.append("in");
visit(clause.getIteratedList(), p);
if (clause.getConditions() != null) {
for (Py.ComprehensionExpression.Condition condition : clause.getConditions()) {
visit(condition, p);
}
}
return clause;
}
@Override
public J visitComprehensionCondition(Py.ComprehensionExpression.Condition condition, PrintOutputCapture
p) {
visitSpace(condition.getPrefix(), PySpace.Location.COMPREHENSION_CONDITION_PREFIX, p);
p.append("if");
visit(condition.getExpression(), p);
return condition;
}
@Override
public J visitAwait(Py.Await await, PrintOutputCapture
p) {
visitSpace(await.getPrefix(), PySpace.Location.AWAIT_PREFIX, p);
p.append("await");
visit(await.getExpression(), p);
return await;
}
@Override
public J visitYieldFrom(Py.YieldFrom yield, PrintOutputCapture
p) {
visitSpace(yield.getPrefix(), PySpace.Location.YIELD_FROM_PREFIX, p);
p.append("from");
visit(yield.getExpression(), p);
return yield;
}
@Override
public J visitVariableScope(Py.VariableScope scope, PrintOutputCapture
p) {
visitSpace(scope.getPrefix(), PySpace.Location.VARIABLE_SCOPE_PREFIX, p);
switch (scope.getKind()) {
case GLOBAL:
p.append("global");
break;
case NONLOCAL:
p.append("nonlocal");
break;
}
visitRightPadded(
scope.getPadding().getNames(),
PyRightPadded.Location.VARIABLE_SCOPE_ELEMENT,
",",
p
);
return scope;
}
@Override
public J visitDel(Py.Del del, PrintOutputCapture
p) {
visitSpace(del.getPrefix(), PySpace.Location.DEL_PREFIX, p);
p.append("del");
visitRightPadded(
del.getPadding().getTargets(),
PyRightPadded.Location.DEL_ELEMENT,
",",
p
);
return del;
}
@Override
public J visitExceptionType(Py.ExceptionType type, PrintOutputCapture
p) {
beforeSyntax(type, PySpace.Location.EXCEPTION_TYPE_PREFIX, p);
if (type.isExceptionGroup()) {
p.append("*");
}
visit(type.getExpression(), p);
return type;
}
@Override
public J visitErrorFrom(Py.ErrorFrom expr, PrintOutputCapture
p) {
beforeSyntax(expr, PySpace.Location.ERROR_FROM_PREFIX, p);
visit(expr.getError(), p);
visitSpace(expr.getPadding().getFrom().getBefore(), PySpace.Location.ERROR_FROM_SOURCE, p);
p.append("from");
visit(expr.getFrom(), p);
return expr;
}
@Override
public J visitMatchCase(Py.MatchCase match, PrintOutputCapture
p) {
beforeSyntax(match, PySpace.Location.MATCH_CASE_PREFIX, p);
visit(match.getPattern(), p);
if (match.getPadding().getGuard() != null) {
visitSpace(match.getPadding().getGuard().getBefore(), PySpace.Location.MATCH_CASE_GUARD, p);
p.append("if");
visit(match.getGuard(), p);
}
return match;
}
@Override
public J visitMatchCasePattern(Py.MatchCase.Pattern pattern, PrintOutputCapture
p) {
beforeSyntax(pattern, PySpace.Location.MATCH_PATTERN_PREFIX, p);
JContainer children = pattern.getPadding().getChildren();
switch (pattern.getKind()) {
case AS:
visitContainer(
"",
children,
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
"as",
"",
p
);
break;
case CAPTURE:
case LITERAL:
visitContainer(
children,
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
p
);
break;
case CLASS:
visitSpace(children.getBefore(), PySpace.Location.MATCH_PATTERN_ELEMENT_PREFIX, p);
visitRightPadded(children.getPadding().getElements().get(0), PyRightPadded.Location.MATCH_PATTERN_ELEMENT, p);
visitContainer(
"(",
JContainer.build(children.getPadding().getElements().subList(1, children.getElements().size())),
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
",",
")",
p
);
break;
case DOUBLE_STAR:
visitContainer(
"**",
children,
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
"",
"",
p
);
break;
case KEY_VALUE:
visitContainer(
"",
children,
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
":",
"",
p
);
break;
case KEYWORD:
visitContainer(
"",
children,
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
"=",
"",
p
);
break;
case MAPPING:
visitContainer(
"{",
children,
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
",",
"}",
p
);
break;
case OR:
visitContainer(
"",
children,
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
"|",
"",
p
);
break;
case SEQUENCE:
visitContainer(
"",
children,
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
",",
"",
p
);
break;
case SEQUENCE_LIST:
visitContainer(
"[",
children,
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
",",
"]",
p
);
break;
case GROUP:
case SEQUENCE_TUPLE:
visitContainer(
"(",
children,
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
",",
")",
p
);
break;
case STAR:
visitContainer(
"*",
children,
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
"",
"",
p
);
break;
case VALUE:
visitContainer(
"",
children,
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
"",
"",
p
);
break;
case WILDCARD:
visitContainer(
"_",
children,
PyContainer.Location.MATCH_PATTERN_ELEMENTS,
"",
"",
p
);
break;
}
return pattern;
}
@Override
public J visitSpecialParameter(Py.SpecialParameter param, PrintOutputCapture p) {
beforeSyntax(param, PySpace.Location.SPECIAL_PARAM_PREFIX, p);
switch (param.getKind()) {
case ARGS:
p.append("*");
break;
case KWARGS:
p.append("**");
break;
}
afterSyntax(param, p);
return param;
}
@Override
public J visitNamedArgument(Py.NamedArgument arg, PrintOutputCapture
p) {
beforeSyntax(arg, PySpace.Location.NAMED_ARGUMENT, p);
visit(arg.getName(), p);
visitLeftPadded("=", arg.getPadding().getValue(), PyLeftPadded.Location.NAMED_ARGUMENT, p);
return arg;
}
@Override
public J visitSlice(Py.Slice slice, PrintOutputCapture
p) {
beforeSyntax(slice, PySpace.Location.SLICE_EXPRESSION_PREFIX, p);
visitRightPadded(slice.getPadding().getStart(), PyRightPadded.Location.SLICE_EXPRESSION_START, p);
p.append(':');
if (slice.getPadding().getStop() != null) {
visitRightPadded(slice.getPadding().getStop(), PyRightPadded.Location.SLICE_EXPRESSION_STOP, p);
if (slice.getPadding().getStep() != null) {
p.append(':');
visitRightPadded(slice.getPadding().getStep(), PyRightPadded.Location.SLICE_EXPRESSION_STEP, p);
}
}
return slice;
}
@Override
public J visitStar(Py.Star star, PrintOutputCapture
p) {
beforeSyntax(star, PySpace.Location.STAR_PREFIX, p);
switch (star.getKind()) {
case LIST:
p.append("*");
break;
case DICT:
p.append("**");
break;
}
visit(star.getExpression(), p);
afterSyntax(star, p);
return star;
}
@Override
public J visitTrailingElseWrapper(Py.TrailingElseWrapper wrapper, PrintOutputCapture
p) {
visit(wrapper.getStatement(), p);
visitSpace(
wrapper.getPadding().getElseBlock().getBefore(),
Location.ELSE_PREFIX,
p
);
p.append("else");
visit(wrapper.getElseBlock(), p);
return wrapper;
}
@Override
public J visitTypeHint(Py.TypeHint type, PrintOutputCapture
p) {
beforeSyntax(type, PySpace.Location.TYPE_HINT_PREFIX, p);
J parent = getCursor().getParentTreeCursor().getValue();
if (parent instanceof J.MethodDeclaration) {
p.append("->");
} else {
p.append(':');
}
visit(type.getTypeTree(), p);
afterSyntax(type, p);
return type;
}
@Override
public J visitTypeHintedExpression(Py.TypeHintedExpression expr, PrintOutputCapture
p) {
beforeSyntax(expr, PySpace.Location.TYPE_HINTED_EXPRESSION_PREFIX, p);
visit(expr.getExpression(), p);
visit(expr.getTypeHint(), p);
afterSyntax(expr, p);
return expr;
}
@SuppressWarnings("SameParameterValue")
private static boolean lastCharIs(PrintOutputCapture p, char c) {
return p.out.length() != 0 && p.out.charAt(p.out.length() - 1) == c;
}
private class PythonJavaPrinter extends JavaPrinter
{
@Override
public J visit(@Nullable Tree tree, PrintOutputCapture
p) {
if (tree instanceof Py) {
// re-route printing back up to Python printer
return PythonPrinter.this.visitNonNull(tree, p);
} else {
//noinspection DataFlowIssue
return super.visit(tree, p);
}
}
@Override
public void setCursor(@Nullable Cursor cursor) {
super.setCursor(cursor);
PythonPrinter.this.internalSetCursor(cursor);
}
public void internalSetCursor(@Nullable Cursor cursor) {
super.setCursor(cursor);
}
@Override
public J visitAnnotation(J.Annotation annotation, PrintOutputCapture
p) {
beforeSyntax(annotation, Space.Location.ANNOTATION_PREFIX, p);
p.append("@");
visit(annotation.getAnnotationType(), p);
visitContainer("(", annotation.getPadding().getArguments(), JContainer.Location.ANNOTATION_ARGUMENTS, ",", ")", p);
afterSyntax(annotation, p);
return annotation;
}
@Override
public J visitArrayDimension(J.ArrayDimension arrayDimension, PrintOutputCapture
p) {
beforeSyntax(arrayDimension, Space.Location.DIMENSION_PREFIX, p);
p.append("[");
visitRightPadded(arrayDimension.getPadding().getIndex(), JRightPadded.Location.ARRAY_INDEX, "]", p);
afterSyntax(arrayDimension, p);
return arrayDimension;
}
@Override
public J visitAssert(J.Assert azzert, PrintOutputCapture
p) {
beforeSyntax(azzert, Location.ASSERT_PREFIX, p);
p.append("assert");
visit(azzert.getCondition(), p);
if (azzert.getDetail() != null) {
visitLeftPadded(",", azzert.getDetail(), JLeftPadded.Location.ASSERT_DETAIL, p);
}
afterSyntax(azzert, p);
return azzert;
}
@Override
public J visitAssignment(J.Assignment assignment, PrintOutputCapture
p) {
final String symbol;
J parentTree = getCursor().getParentTreeCursor().getValue();
if (parentTree instanceof J.Block ||
parentTree instanceof Py.CompilationUnit ||
(parentTree instanceof J.If) && ((J.If) parentTree).getThenPart() == assignment ||
(parentTree instanceof J.If.Else) && ((J.If.Else) parentTree).getBody() == assignment ||
(parentTree instanceof Loop) && ((Loop) parentTree).getBody() == assignment) {
symbol = "=";
} else {
symbol = ":=";
}
beforeSyntax(assignment, Space.Location.ASSIGNMENT_PREFIX, p);
visit(assignment.getVariable(), p);
visitLeftPadded(symbol, assignment.getPadding().getAssignment(), JLeftPadded.Location.ASSIGNMENT, p);
afterSyntax(assignment, p);
return assignment;
}
@Override
public J visitAssignmentOperation(J.AssignmentOperation assignOp, PrintOutputCapture
p) {
String keyword = "";
switch (assignOp.getOperator()) {
case Addition:
keyword = "+=";
break;
case Subtraction:
keyword = "-=";
break;
case Multiplication:
keyword = "*=";
break;
case Division:
keyword = "/=";
break;
case Modulo:
keyword = "%=";
break;
case BitAnd:
keyword = "&=";
break;
case BitOr:
keyword = "|=";
break;
case BitXor:
keyword = "^=";
break;
case LeftShift:
keyword = "<<=";
break;
case RightShift:
keyword = ">>=";
break;
case UnsignedRightShift:
keyword = ">>>=";
break;
case Exponentiation:
keyword = "**=";
break;
case FloorDivision:
keyword = "//=";
break;
case MatrixMultiplication:
keyword = "@=";
break;
}
beforeSyntax(assignOp, Location.ASSIGNMENT_OPERATION_PREFIX, p);
visit(assignOp.getVariable(), p);
visitSpace(assignOp.getPadding().getOperator().getBefore(), Location.ASSIGNMENT_OPERATION_OPERATOR, p);
p.append(keyword);
visit(assignOp.getAssignment(), p);
afterSyntax(assignOp, p);
return assignOp;
}
@Override
public J visitBinary(J.Binary binary, PrintOutputCapture
p) {
String keyword = "";
switch (binary.getOperator()) {
case Addition:
keyword = "+";
break;
case Subtraction:
keyword = "-";
break;
case Multiplication:
keyword = "*";
break;
case Division:
keyword = "/";
break;
case Modulo:
keyword = "%";
break;
case LessThan:
keyword = "<";
break;
case GreaterThan:
keyword = ">";
break;
case LessThanOrEqual:
keyword = "<=";
break;
case GreaterThanOrEqual:
keyword = ">=";
break;
case Equal:
keyword = "==";
break;
case NotEqual:
keyword = "!=";
break;
case BitAnd:
keyword = "&";
break;
case BitOr:
keyword = "|";
break;
case BitXor:
keyword = "^";
break;
case LeftShift:
keyword = "<<";
break;
case RightShift:
keyword = ">>";
break;
case UnsignedRightShift:
keyword = ">>>";
break;
case Or:
keyword = "or";
break;
case And:
keyword = "and";
break;
}
beforeSyntax(binary, Space.Location.BINARY_PREFIX, p);
visit(binary.getLeft(), p);
visitSpace(binary.getPadding().getOperator().getBefore(), Space.Location.BINARY_OPERATOR, p);
p.append(keyword);
visit(binary.getRight(), p);
afterSyntax(binary, p);
return binary;
}
@Override
public J visitBlock(J.Block block, PrintOutputCapture
p) {
beforeSyntax(block, Location.BLOCK_PREFIX, p);
p.append(':');
visitStatements(block.getPadding().getStatements(), JRightPadded.Location.BLOCK_STATEMENT, p);
visitSpace(block.getEnd(), Space.Location.BLOCK_END, p);
afterSyntax(block, p);
return block;
}
@Override
public J visitCase(J.Case ca, PrintOutputCapture
p) {
beforeSyntax(ca, Space.Location.CASE_PREFIX, p);
Expression elem = ca.getExpressions().get(0);
if (!(elem instanceof J.Identifier) || !((J.Identifier) elem).getSimpleName().equals("default")) {
p.append("case");
}
visitContainer("", ca.getPadding().getExpressions(), JContainer.Location.CASE_EXPRESSION, ",", "", p);
visitSpace(ca.getPadding().getStatements().getBefore(), Space.Location.CASE, p);
visitStatements(ca.getPadding().getStatements().getPadding().getElements(), JRightPadded.Location.CASE, p);
if (ca.getBody() instanceof Statement) {
visitRightPadded(ca.getPadding().getBody(), JRightPadded.Location.LANGUAGE_EXTENSION, p);
} else {
visitRightPadded(ca.getPadding().getBody(), JRightPadded.Location.CASE_BODY, ";", p);
}
afterSyntax(ca, p);
return ca;
}
@Override
public J visitCatch(J.Try.Catch ca, PrintOutputCapture
p) {
beforeSyntax(ca, Space.Location.CATCH_PREFIX, p);
p.append("except");
J.VariableDeclarations multiVariable = ca.getParameter().getTree();
beforeSyntax(multiVariable, Space.Location.VARIABLE_DECLARATIONS_PREFIX, p);
visit(multiVariable.getTypeExpression(), p);
for (JRightPadded paddedVariable : multiVariable.getPadding().getVariables()) {
J.VariableDeclarations.NamedVariable variable = paddedVariable.getElement();
if (variable.getName().getSimpleName().isEmpty()) {
continue;
}
visitSpace(paddedVariable.getAfter(), Location.LANGUAGE_EXTENSION, p);
beforeSyntax(variable, Space.Location.VARIABLE_PREFIX, p);
p.append("as");
visit(variable.getName(), p);
afterSyntax(variable, p);
}
afterSyntax(multiVariable, p);
visit(ca.getBody(), p);
afterSyntax(ca, p);
return ca;
}
@Override
public J visitClassDeclaration(J.ClassDeclaration classDecl, PrintOutputCapture p) {
beforeSyntax(classDecl, Space.Location.CLASS_DECLARATION_PREFIX, p);
visitSpace(Space.EMPTY, Space.Location.ANNOTATIONS, p);
visit(classDecl.getLeadingAnnotations(), p);
visit(classDecl.getPadding().getKind().getAnnotations(), p);
visitSpace(
classDecl.getPadding().getKind().getPrefix(),
Space.Location.CLASS_KIND,
p
);
p.append("class");
visit(classDecl.getName(), p);
if (classDecl.getPadding().getImplements() != null) {
boolean omitParens = classDecl.getPadding().getImplements().getMarkers().findFirst(OmitParentheses.class).isPresent();
visitContainer(omitParens ? "" : "(", classDecl.getPadding().getImplements(), JContainer.Location.IMPLEMENTS,
",", omitParens ? "" : ")", p);
}
visit(classDecl.getBody(), p);
afterSyntax(classDecl, p);
return classDecl;
}
@Override
public J visitControlParentheses(J.ControlParentheses controlParens, PrintOutputCapture p) {
beforeSyntax(controlParens, Space.Location.CONTROL_PARENTHESES_PREFIX, p);
visitRightPadded(controlParens.getPadding().getTree(), JRightPadded.Location.PARENTHESES, "", p);
afterSyntax(controlParens, p);
return controlParens;
}
@Override
public J visitElse(J.If.Else else_, PrintOutputCapture
p) {
beforeSyntax(else_, Space.Location.ELSE_PREFIX, p);
if (getCursor().getParentTreeCursor().getValue() instanceof J.If && else_.getBody() instanceof J.If) {
p.append("el");
visit(else_.getBody(), p);
} else if (else_.getBody() instanceof J.Block) {
p.append("else");
visit(else_.getBody(), p);
} else {
p.append("else");
p.append(':');
visit(else_.getBody(), p);
}
afterSyntax(else_, p);
return else_;
}
@Override
public J visitForEachControl(J.ForEachLoop.Control control, PrintOutputCapture
p) {
beforeSyntax(control, Space.Location.FOR_EACH_CONTROL_PREFIX, p);
visitRightPadded(control.getPadding().getVariable(), JRightPadded.Location.FOREACH_VARIABLE, p);
p.append("in");
visitRightPadded(control.getPadding().getIterable(), JRightPadded.Location.FOREACH_ITERABLE, p);
afterSyntax(control, p);
return control;
}
@Override
public J visitForEachLoop(J.ForEachLoop forEachLoop, PrintOutputCapture
p) {
beforeSyntax(forEachLoop, Space.Location.FOR_EACH_LOOP_PREFIX, p);
p.append("for");
visit(forEachLoop.getControl(), p);
visit(forEachLoop.getBody(), p);
afterSyntax(forEachLoop, p);
return forEachLoop;
}
@Override
public J visitIf(J.If iff, PrintOutputCapture
p) {
beforeSyntax(iff, Space.Location.IF_PREFIX, p);
p.append("if");
visit(iff.getIfCondition(), p);
JRightPadded thenPart = iff.getPadding().getThenPart();
if (!(thenPart.getElement() instanceof J.Block)) {
p.append(":");
}
visitStatement(thenPart, JRightPadded.Location.IF_THEN, p);
visit(iff.getElsePart(), p);
afterSyntax(iff, p);
return iff;
}
@Override
public J visitImport(Import im, PrintOutputCapture p) {
beforeSyntax(im, Space.Location.IMPORT_PREFIX, p);
if (im.getQualid().getTarget() instanceof J.Empty) {
visit(im.getQualid().getName(), p);
} else {
visit(im.getQualid(), p);
}
visitLeftPadded("as", im.getPadding().getAlias(), JLeftPadded.Location.IMPORT_ALIAS_PREFIX, p);
afterSyntax(im, p);
return im;
}
@Override
public J visitLambda(J.Lambda lambda, PrintOutputCapture
p) {
beforeSyntax(lambda, Space.Location.LAMBDA_PREFIX, p);
p.append("lambda");
visitSpace(lambda.getParameters().getPrefix(), Space.Location.LAMBDA_PARAMETERS_PREFIX, p);
visitMarkers(lambda.getParameters().getMarkers(), p);
visitRightPadded(lambda.getParameters().getPadding().getParameters(), JRightPadded.Location.LAMBDA_PARAM, ",", p);
visitSpace(lambda.getArrow(), Space.Location.LAMBDA_ARROW_PREFIX, p);
p.append(":");
visit(lambda.getBody(), p);
afterSyntax(lambda, p);
return lambda;
}
@Override
public J visitLiteral(J.Literal literal, PrintOutputCapture
p) {
if (literal.getValue() == null && literal.getValueSource() == null) {
// currently, also `...` is mapped to a `None` value
literal = literal.withValueSource("None");
}
beforeSyntax(literal, Space.Location.LITERAL_PREFIX, p);
List unicodeEscapes = literal.getUnicodeEscapes();
if (unicodeEscapes == null) {
p.append(literal.getValueSource());
} else if (literal.getValueSource() != null) {
Iterator surrogateIter = unicodeEscapes.iterator();
J.Literal.UnicodeEscape surrogate = surrogateIter.hasNext() ?
surrogateIter.next() : null;
int i = 0;
if (surrogate != null && surrogate.getValueSourceIndex() == 0) {
p.append("\\u").append(surrogate.getCodePoint());
if (surrogateIter.hasNext()) {
surrogate = surrogateIter.next();
}
}
char[] valueSourceArr = literal.getValueSource().toCharArray();
for (char c : valueSourceArr) {
p.append(c);
if (surrogate != null && surrogate.getValueSourceIndex() == ++i) {
while (surrogate != null && surrogate.getValueSourceIndex() == i) {
p.append("\\u").append(surrogate.getCodePoint());
surrogate = surrogateIter.hasNext() ? surrogateIter.next() : null;
}
}
}
}
afterSyntax(literal, p);
return literal;
}
@Override
public M visitMarker(Marker marker, PrintOutputCapture p) {
if (marker instanceof Semicolon) {
p.append(';');
} else if (marker instanceof TrailingComma) {
p.append(',');
visitSpace(((TrailingComma) marker).getSuffix(), Location.ANY, p);
}
//noinspection unchecked
return (M) marker;
}
@Override
public J visitMethodDeclaration(J.MethodDeclaration method, PrintOutputCapture
p) {
beforeSyntax(method, Space.Location.METHOD_DECLARATION_PREFIX, p);
visitSpace(Space.EMPTY, Space.Location.ANNOTATIONS, p);
visit(method.getLeadingAnnotations(), p);
for (J.Modifier m : method.getModifiers()) {
visitModifier(m, p);
}
visit(method.getName(), p);
visitContainer("(", method.getPadding().getParameters(), JContainer.Location.METHOD_DECLARATION_PARAMETERS, ",", ")", p);
visit(method.getReturnTypeExpression(), p);
visit(method.getBody(), p);
afterSyntax(method, p);
return method;
}
@Override
public J visitMethodInvocation(J.MethodInvocation method, PrintOutputCapture
p) {
beforeSyntax(method, Space.Location.METHOD_INVOCATION_PREFIX, p);
visitRightPadded(method.getPadding().getSelect(), JRightPadded.Location.METHOD_SELECT, method.getSimpleName().isEmpty() ? "" : ".", p);
visitContainer("<", method.getPadding().getTypeParameters(), JContainer.Location.TYPE_PARAMETERS, ",", ">", p);
visit(method.getName(), p);
String before = "(";
String after = ")";
if (method.getMarkers().findFirst(OmitParentheses.class).isPresent()) {
before = "";
after = "";
}
visitContainer(before, method.getPadding().getArguments(), JContainer.Location.METHOD_INVOCATION_ARGUMENTS, ",", after, p);
afterSyntax(method, p);
return method;
}
protected void visitModifier(J.Modifier mod, PrintOutputCapture
p) {
String keyword = null;
switch (mod.getType()) {
case Default:
keyword = "def";
break;
case Async:
keyword = "async";
break;
}
if (keyword != null) {
visit(mod.getAnnotations(), p);
beforeSyntax(mod, Space.Location.MODIFIER_PREFIX, p);
p.append(keyword);
afterSyntax(mod, p);
}
}
@Override
public J visitNewArray(J.NewArray newArray, PrintOutputCapture
p) {
beforeSyntax(newArray, Space.Location.NEW_ARRAY_PREFIX, p);
visitContainer("[", newArray.getPadding().getInitializer(), JContainer.Location.NEW_ARRAY_INITIALIZER, ",", "]", p);
afterSyntax(newArray, p);
return newArray;
}
@Override
public J visitParameterizedType(J.ParameterizedType type, PrintOutputCapture
p) {
beforeSyntax(type, Space.Location.PARAMETERIZED_TYPE_PREFIX, p);
visit(type.getClazz(), p);
visitContainer("[", type.getPadding().getTypeParameters(), JContainer.Location.TYPE_PARAMETERS, ",", "]", p);
afterSyntax(type, p);
return type;
}
@Override
public J visitSwitch(J.Switch sw, PrintOutputCapture
p) {
beforeSyntax(sw, Space.Location.SWITCH_PREFIX, p);
p.append("match");
visit(sw.getSelector(), p);
visit(sw.getCases(), p);
afterSyntax(sw, p);
return sw;
}
@Override
public J visitTernary(J.Ternary ternary, PrintOutputCapture
p) {
beforeSyntax(ternary, Space.Location.TERNARY_PREFIX, p);
visit(ternary.getTruePart(), p);
visitSpace(ternary.getPadding().getTruePart().getBefore(), Location.TERNARY_TRUE, p);
p.append("if");
visit(ternary.getCondition(), p);
visitLeftPadded("else", ternary.getPadding().getFalsePart(), JLeftPadded.Location.TERNARY_FALSE, p);
afterSyntax(ternary, p);
return ternary;
}
@Override
public J visitThrow(J.Throw thrown, PrintOutputCapture
p) {
beforeSyntax(thrown, Space.Location.THROW_PREFIX, p);
p.append("raise");
visit(thrown.getException(), p);
afterSyntax(thrown, p);
return thrown;
}
@Override
public J visitTry(J.Try tryable, PrintOutputCapture
p) {
boolean isWithStatement = tryable.getResources() != null && !tryable.getResources().isEmpty();
beforeSyntax(tryable, Space.Location.TRY_PREFIX, p);
if (isWithStatement) {
p.append("with");
} else {
p.append("try");
}
if (isWithStatement && tryable.getPadding().getResources() != null) {
visitSpace(tryable.getPadding().getResources().getBefore(), Space.Location.TRY_RESOURCES, p);
List> resources = tryable.getPadding().getResources().getPadding().getElements();
boolean first = true;
for (JRightPadded resource : resources) {
if (!first) {
p.append(",");
} else {
first = false;
}
visitSpace(resource.getElement().getPrefix(), Space.Location.TRY_RESOURCE, p);
visitMarkers(resource.getElement().getMarkers(), p);
TypedTree decl = resource.getElement().getVariableDeclarations();
if (!(decl instanceof J.Assignment)) {
throw new IllegalArgumentException(
String.format(
"with-statement resource should be an Assignment; found: %s",
decl.getClass().getSimpleName()
)
);
}
J.Assignment assignment = (J.Assignment) decl;
visit(assignment.getAssignment(), p);
if (!(assignment.getVariable() instanceof J.Empty)) {
visitSpace(assignment.getPadding().getAssignment().getBefore(), Location.LANGUAGE_EXTENSION, p);
p.append("as");
visit(assignment.getVariable(), p);
}
visitSpace(resource.getAfter(), Space.Location.TRY_RESOURCE_SUFFIX, p);
}
}
J.Block tryBody = tryable.getBody();
JRightPadded elseBody = null;
List> tryStatements = tryable.getBody().getPadding().getStatements();
if (tryStatements.get(tryStatements.size() - 1).getElement() instanceof J.Block) {
tryBody = tryBody.getPadding().withStatements(tryStatements.subList(0, tryStatements.size() - 1));
elseBody = tryStatements.get(tryStatements.size() - 1);
}
visit(tryBody, p);
visit(tryable.getCatches(), p);
if (elseBody != null) {
// padding is reversed for the `else` part because it's wrapped as though it were a normal statement,
// so its extra padding (which acts as JLeftPadding) is stored in a JRightPadding
visitSpace(elseBody.getAfter(), Location.LANGUAGE_EXTENSION, p);
p.append("else");
visit(elseBody.getElement(), p);
}
visitLeftPadded("finally", tryable.getPadding().getFinally(), JLeftPadded.Location.TRY_FINALLY, p);
afterSyntax(tryable, p);
return tryable;
}
@Override
public J visitUnary(J.Unary unary, PrintOutputCapture p) {
beforeSyntax(unary, Space.Location.UNARY_PREFIX, p);
switch (unary.getOperator()) {
case Not:
p.append("not");
break;
case Positive:
p.append("+");
break;
case Negative:
p.append("-");
break;
case Complement:
p.append("~");
break;
}
visit(unary.getExpression(), p);
afterSyntax(unary, p);
return unary;
}
@Override
public J visitVariable(J.VariableDeclarations.NamedVariable variable, PrintOutputCapture
p) {
beforeSyntax(variable, Space.Location.VARIABLE_PREFIX, p);
J.VariableDeclarations vd = getCursor().getParentTreeCursor().getValue();
JRightPadded padding = getCursor().getParent().getValue();
TypeTree type = vd.getTypeExpression();
if (type instanceof Py.SpecialParameter) {
Py.SpecialParameter special = (Py.SpecialParameter) type;
visit(special, p);
type = special.getTypeHint();
}
if (variable.getName().getSimpleName().isEmpty()) {
visit(variable.getInitializer(), p);
} else {
if (vd.getVarargs() != null) {
visitSpace(vd.getVarargs(), Location.VARARGS, p);
p.append('*');
}
if (vd.getMarkers().findFirst(KeywordArguments.class).isPresent()) {
p.append("**");
}
visit(variable.getName(), p);
if (type != null) {
visitSpace(padding.getAfter(), JRightPadded.Location.NAMED_VARIABLE.getAfterLocation(), p);
p.append(':');
visit(type, p);
}
visitLeftPadded("=", variable.getPadding().getInitializer(), JLeftPadded.Location.VARIABLE_INITIALIZER, p);
}
afterSyntax(variable, p);
return variable;
}
@Override
public J visitVariableDeclarations(J.VariableDeclarations multiVariable, PrintOutputCapture p) {
beforeSyntax(multiVariable, Space.Location.VARIABLE_DECLARATIONS_PREFIX, p);
visitSpace(Space.EMPTY, Space.Location.ANNOTATIONS, p);
visit(multiVariable.getLeadingAnnotations(), p);
for (J.Modifier m : multiVariable.getModifiers()) {
visitModifier(m, p);
}
if (multiVariable.getMarkers().findFirst(KeywordOnlyArguments.class).isPresent()) {
p.append("*");
}
List> nodes = multiVariable.getPadding().getVariables();
for (int i = 0; i < nodes.size(); i++) {
JRightPadded node = nodes.get(i);
setCursor(new Cursor(getCursor(), node));
visit(node.getElement(), p);
visitMarkers(node.getMarkers(), p);
if (i < nodes.size() - 1) {
p.append(",");
}
setCursor(getCursor().getParent());
}
afterSyntax(multiVariable, p);
return multiVariable;
}
@Override
protected void printStatementTerminator(Statement s, PrintOutputCapture
p) {
// optional semicolons are handled in `visitMarker()`
}
}
@Override
public M visitMarker(Marker marker, PrintOutputCapture p) {
return delegate.visitMarker(marker, p);
}
private static final UnaryOperator JAVA_MARKER_WRAPPER =
out -> "/*~~" + out + (out.isEmpty() ? "" : "~~") + ">*/";
private void beforeSyntax(Py py,
@SuppressWarnings("SameParameterValue") Space.Location loc,
PrintOutputCapture p) {
beforeSyntax(py.getPrefix(), py.getMarkers(), loc, p);
}
private void beforeSyntax(Py py, PySpace.Location loc, PrintOutputCapture
p) {
beforeSyntax(py.getPrefix(), py.getMarkers(), loc, p);
}
private void beforeSyntax(Space prefix, Markers markers, PySpace.@Nullable Location loc, PrintOutputCapture
p) {
for (Marker marker : markers.getMarkers()) {
p.append(p.getMarkerPrinter().beforePrefix(marker, new Cursor(getCursor(), marker), JAVA_MARKER_WRAPPER));
}
if (loc != null) {
visitSpace(prefix, loc, p);
}
visitMarkers(markers, p);
for (Marker marker : markers.getMarkers()) {
p.append(p.getMarkerPrinter().beforeSyntax(marker, new Cursor(getCursor(), marker), JAVA_MARKER_WRAPPER));
}
}
private void beforeSyntax(Space prefix, Markers markers, Space.@Nullable Location loc, PrintOutputCapture
p) {
for (Marker marker : markers.getMarkers()) {
p.append(p.getMarkerPrinter().beforePrefix(marker, new Cursor(getCursor(), marker), JAVA_MARKER_WRAPPER));
}
if (loc != null) {
visitSpace(prefix, loc, p);
}
visitMarkers(markers, p);
for (Marker marker : markers.getMarkers()) {
p.append(p.getMarkerPrinter().beforeSyntax(marker, new Cursor(getCursor(), marker), JAVA_MARKER_WRAPPER));
}
}
private void afterSyntax(Py py, PrintOutputCapture
p) {
afterSyntax(py.getMarkers(), p);
}
private void afterSyntax(Markers markers, PrintOutputCapture
p) {
for (Marker marker : markers.getMarkers()) {
p.append(p.getMarkerPrinter().afterSyntax(marker, new Cursor(getCursor(), marker), JAVA_MARKER_WRAPPER));
}
}
@Override
public Space visitSpace(Space space, PySpace.Location loc, PrintOutputCapture
p) {
return delegate.visitSpace(space, Space.Location.LANGUAGE_EXTENSION, p);
}
@Override
public Space visitSpace(Space space, Space.Location loc, PrintOutputCapture
p) {
return delegate.visitSpace(space, loc, p);
}
protected void visitContainer(String before, @Nullable JContainer container, PyContainer.Location location,
String suffixBetween, @Nullable String after, PrintOutputCapture
p) {
if (container == null) {
return;
}
visitSpace(container.getBefore(), location.getBeforeLocation(), p);
p.append(before);
visitRightPadded(container.getPadding().getElements(), location.getElementLocation(), suffixBetween, p);
p.append(after == null ? "" : after);
}
private void visitLeftPadded(@SuppressWarnings("SameParameterValue") String s,
JLeftPadded left,
@SuppressWarnings({"SameParameterValue", "unused"}) PyLeftPadded.Location loc,
PrintOutputCapture p) {
delegate.visitSpace(left.getBefore(), Location.LANGUAGE_EXTENSION, p);
p.append(s);
delegate.visitLeftPadded(left, JLeftPadded.Location.LANGUAGE_EXTENSION, p);
}
protected void visitRightPadded(List> nodes, PyRightPadded.Location location, String suffixBetween, PrintOutputCapture
p) {
for (int i = 0; i < nodes.size(); i++) {
JRightPadded node = nodes.get(i);
visit(node.getElement(), p);
visitSpace(node.getAfter(), location.getAfterLocation(), p);
visitMarkers(node.getMarkers(), p);
if (i < nodes.size() - 1) {
p.append(suffixBetween);
}
}
}
}