raw.runtime.truffle.ast.io.xml.parser.XmlParseValueNode Maven / Gradle / Ivy

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/*
 * Copyright 2023 RAW Labs S.A.
 *
 * Use of this software is governed by the Business Source License
 * included in the file licenses/BSL.txt.
 *
 * As of the Change Date specified in that file, in accordance with
 * the Business Source License, use of this software will be governed
 * by the Apache License, Version 2.0, included in the file
 * licenses/APL.txt.
 */

package raw.runtime.truffle.ast.io.xml.parser;

import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.nodes.DirectCallNode;
import com.oracle.truffle.api.nodes.NodeInfo;
import com.oracle.truffle.api.nodes.RootNode;
import raw.runtime.truffle.ExpressionNode;
import raw.runtime.truffle.utils.RawTruffleStringCharStream;

@NodeInfo(shortName = "XmlParseValue")
public class XmlParseValueNode extends ExpressionNode {

  @Child private ExpressionNode stringExp;

  @Child private DirectCallNode childDirectCall;
  @Child private ExpressionNode dateFormatExp;
  @Child private ExpressionNode timeFormatExp;
  @Child private ExpressionNode datetimeFormatExp;

  private RawTruffleXmlParser parser;

  public XmlParseValueNode(
      ExpressionNode stringExp,
      ExpressionNode dateFormatExp,
      ExpressionNode timeFormatExp,
      ExpressionNode datetimeFormatExp,
      RootNode readerNode) {
    this.stringExp = stringExp;
    this.dateFormatExp = dateFormatExp;
    this.timeFormatExp = timeFormatExp;
    this.datetimeFormatExp = datetimeFormatExp;
    this.childDirectCall = DirectCallNode.create(readerNode.getCallTarget());
  }

  @Override
  public Object executeGeneric(VirtualFrame virtualFrame) {
    try {
      String string = (String) stringExp.executeGeneric(virtualFrame);
      RawTruffleStringCharStream stream = new RawTruffleStringCharStream(string);

      String dateFormat = (String) dateFormatExp.executeGeneric(virtualFrame);
      String timeFormat = (String) timeFormatExp.executeGeneric(virtualFrame);
      String datetimeFormat = (String) datetimeFormatExp.executeGeneric(virtualFrame);
      RawTruffleXmlParserSettings settings =
          new RawTruffleXmlParserSettings(dateFormat, timeFormat, datetimeFormat);

      parser = RawTruffleXmlParser.create(stream, settings);
      parser.nextToken(); // consume START_OBJECT
      parser.assertCurrentTokenIsStartTag(); // because it's the top level object
      return this.childDirectCall.call(parser); // ... and we start to parse it.
    } finally {
      if (parser != null) parser.close();
      parser = null;
    }
  }
}