package com.github.jsr330.spi.config.xml;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;
import java.net.URL;
import java.nio.charset.Charset;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;
import com.github.jsr330.spi.TypeConfig;
import com.github.jsr330.spi.config.builder.ConfigBuilder;
/**
* This is a simple {@link ConfigBuilder}-based SAX configurator.
*/
public class XmlConfig {
static final Logger LOGGER = LoggerFactory.getLogger(XmlConfig.class);
protected Reader source;
public XmlConfig(String json) {
source = new StringReader(json);
}
public XmlConfig(File file) throws FileNotFoundException {
source = new InputStreamReader(new FileInputStream(file));
}
public XmlConfig(URL source) throws IOException {
this.source = new InputStreamReader(source.openStream());
}
public XmlConfig(byte[] json) {
source = new StringReader(new String(json));
}
public XmlConfig(byte[] json, Charset charset) {
source = new StringReader(new String(json, charset));
}
public XmlConfig(InputStream source) {
this.source = new InputStreamReader(source);
}
public XmlConfig(Reader source) {
this.source = source;
}
/**
* Gets the {@link TypeConfig} by parsing the XML file. The correct sequence is ensured by the corresponding XSD file.
*/
public TypeConfig getConfig(final ClassLoader loader) throws IOException, SAXException {
final ConfigBuilder builder = new ConfigBuilder();
XMLReader sax;
if (source != null) {
try {
sax = XMLReaderFactory.createXMLReader();
sax.setContentHandler(new ConfigHandler(loader, builder));
sax.parse(new InputSource(source));
return builder.build();
} finally {
try {
source.close();
} catch (IOException exception) {
LOGGER.debug("error while closing reader.", exception);
}
}
}
return null;
}
}