com.crabshue.commons.xml.sax.SaxParsingExecutor Maven / Gradle / Ivy

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package com.crabshue.commons.xml.sax;

import java.io.File;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.InputSource;
import org.xml.sax.helpers.DefaultHandler;

import com.crabshue.commons.exceptions.ApplicationException;
import com.crabshue.commons.exceptions.SystemException;
import com.crabshue.commons.xml.exceptions.XmlErrorContext;
import com.crabshue.commons.xml.exceptions.XmlErrorType;
import com.crabshue.commons.xml.inputsource.InputSourceBuilder;
import lombok.NonNull;

/**
 * Utility class for executing XML SAX parsing.
 */
public class SaxParsingExecutor {

    /**
     * Parse an XML file using a SAX parser, with a given SAX handler.
     *
     * @param xmlFile    the XML file.
     * @param saxHandler the SAX handler.
     */
    public static void parseXmlFile(@NonNull final File xmlFile,
                                    @NonNull final DefaultHandler saxHandler) {

        parseXmlFile(InputSourceBuilder.newInputSource(xmlFile), saxHandler);
    }

    /**
     * Parse an XML file using a SAX parser, with a given SAX handler.
     *
     * @param xmlInputSource the XML file.
     * @param saxHandler     the SAX handler.
     */
    public static void parseXmlFile(@NonNull final InputSource xmlInputSource,
                                    @NonNull final DefaultHandler saxHandler) {

        try {
            SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
            saxParser.parse(xmlInputSource, saxHandler);
        } catch (ApplicationException e) {
            throw e;
        } catch (Exception e) {
            throw new SystemException(XmlErrorType.ERROR_PARSING_XML, "Cannot parse xml file with sax parser", e)
                .addContextValue(XmlErrorContext.XML_FILE, xmlInputSource.getSystemId())
                .addContextValue("saxHandler", saxHandler);
        }
    }
}