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package org.zwobble.couscous.backends.python;
import org.zwobble.couscous.backends.python.ast.PythonBlock;
import org.zwobble.couscous.backends.python.ast.PythonBooleanLiteralNode;
import org.zwobble.couscous.backends.python.ast.PythonClassNode;
import org.zwobble.couscous.backends.python.ast.PythonFunctionDefinitionNode;
import org.zwobble.couscous.backends.python.ast.PythonIntegerLiteralNode;
import org.zwobble.couscous.backends.python.ast.PythonModuleNode;
import org.zwobble.couscous.backends.python.ast.PythonNode;
import org.zwobble.couscous.backends.python.ast.PythonPassNode;
import org.zwobble.couscous.backends.python.ast.PythonReturnNode;
import org.zwobble.couscous.backends.python.ast.PythonStringLiteralNode;
import org.zwobble.couscous.backends.python.ast.PythonWriter;
import org.zwobble.couscous.backends.python.ast.visitors.PythonNodeVisitor;
import static com.google.common.collect.Iterables.skip;
import lombok.val;
public class PythonSerializer implements PythonNodeVisitor<Void> {
public static String serialize(PythonNode node) {
val writer = new PythonWriter();
val serializer = new PythonSerializer(writer);
serializer.write(node);
return writer.asString();
}
private PythonWriter writer;
private PythonSerializer(PythonWriter writer) {
this.writer = writer;
}
public void write(PythonNode node) {
node.accept(this);
}
@Override
public Void visit(PythonIntegerLiteralNode integerLiteral) {
writer.writeInteger(integerLiteral.getValue());
return null;
}
@Override
public Void visit(PythonStringLiteralNode stringLiteral) {
writer.writeStringLiteral(stringLiteral.getValue());
return null;
}
@Override
public Void visit(PythonBooleanLiteralNode booleanLiteral) {
writer.writeKeyword(booleanLiteral.getValue() ? "True" : "False");
return null;
}
@Override
public Void visit(PythonReturnNode pythonReturn) {
writer.startStatement();
writer.writeKeyword("return");
writer.writeSpace();
write(pythonReturn.getValue());
writer.endStatement();
return null;
}
@Override
public Void visit(PythonPassNode pass) {
writer.startStatement();
writer.writeKeyword("pass");
writer.endStatement();
return null;
}
@Override
public Void visit(PythonClassNode pythonClass) {
writer.startStatement();
writer.writeKeyword("class");
writer.writeSpace();
writer.writeIdentifier(pythonClass.getName());
writer.writeSymbol("(");
writer.writeIdentifier("object");
writer.writeSymbol(")");
writeBlock(pythonClass.getBody());
writer.endStatement();
return null;
}
@Override
public Void visit(PythonFunctionDefinitionNode functionDefinition) {
writer.startStatement();
writer.writeKeyword("def");
writer.writeSpace();
writer.writeIdentifier(functionDefinition.getName());
writer.writeSymbol("(");
writeArgumentNames(functionDefinition);
writer.writeSymbol(")");
writeBlock(functionDefinition.getBody());
writer.endStatement();
return null;
}
private void writeArgumentNames(PythonFunctionDefinitionNode functionDefinition) {
if (!functionDefinition.getArgumentNames().isEmpty()) {
writer.writeIdentifier(functionDefinition.getArgumentNames().get(0));
for (val argumentName : skip(functionDefinition.getArgumentNames(), 1)) {
writer.writeSymbol(",");
writer.writeSpace();
writer.writeIdentifier(argumentName);
}
}
}
@Override
public Void visit(PythonModuleNode module) {
for (val statement : module.getStatements()) {
write(statement);
}
return null;
}
private void writeBlock(PythonBlock body) {
writer.startBlock();
for (val statement : body) {
write(statement);
}
writer.endBlock();
}
}
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