net.n2oapp.framework.config.reader.XmlMetadataLoader Maven / Gradle / Ivy
package net.n2oapp.framework.config.reader;
import net.n2oapp.framework.api.exception.N2oException;
import net.n2oapp.framework.api.metadata.SourceMetadata;
import net.n2oapp.framework.api.metadata.reader.NamespaceReaderFactory;
import net.n2oapp.framework.api.reader.SourceLoader;
import net.n2oapp.framework.api.register.MetadataRegister;
import net.n2oapp.framework.config.io.MetadataParamHolder;
import net.n2oapp.framework.config.register.XmlInfo;
import net.n2oapp.framework.config.register.route.RouteUtil;
import net.n2oapp.framework.config.util.FileSystemUtil;
import org.apache.commons.io.IOUtils;
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;
import java.io.IOException;
import java.io.InputStream;
/**
* Чтение XML метаданных
*/
public class XmlMetadataLoader implements SourceLoader {
private NamespaceReaderFactory elementReaderFactory;
private MetadataRegister configRegister;
@Deprecated
public XmlMetadataLoader(NamespaceReaderFactory elementReaderFactory, MetadataRegister configRegister) {
this.elementReaderFactory = elementReaderFactory;
this.configRegister = configRegister;
}
public XmlMetadataLoader(NamespaceReaderFactory elementReaderFactory) {
this.elementReaderFactory = elementReaderFactory;
}
@Override
public S load(XmlInfo info, String params) {
Class sourceClass = info.getBaseSourceClass();
try (InputStream inputStream = FileSystemUtil.getContentAsStream(info.getURI())) {
MetadataParamHolder.setParams(RouteUtil.parseQueryParams(params));
S source = read(info.getId(), inputStream);
if (!sourceClass.isAssignableFrom(source.getClass()))
throw new MetadataReaderException("read class [" + source.getClass() + "], but expected [" + sourceClass + "]");
return source;
} catch (N2oException e) {
throw e;
} catch (Exception e) {
throw new N2oMetadataReaderException(e, info.getId(), info.getURI(), info.getConfigId().getType());
} finally {
MetadataParamHolder.setParams(null);
}
}
public T read(String id, String xml) {
try {
return read(id, IOUtils.toInputStream(xml, "UTF-8"));
} catch (IOException e) {
throw new N2oException(e);
}
}
@SuppressWarnings("unchecked")
public T read(String id, InputStream xml) {
SAXBuilder builder = new SAXBuilder();
Document doc;
try {
doc = builder.build(xml);
} catch (JDOMException | IOException e) {
throw new N2oException("Error reading metadata " + id, e);
}
Element root = doc.getRootElement();
T n2o = (T) elementReaderFactory.produce(root).read(root);
if (n2o == null)
throw new MetadataReaderException("Xml Element Reader must return not null object");
n2o.setId(id);
return n2o;
}
public T read(String id, InputStream xml, Class metadataClass) {
T n2o = read(id, xml);
if (!metadataClass.isAssignableFrom(n2o.getClass()))
throw new MetadataReaderException("read class [" + n2o.getClass() + "], but expected [" + metadataClass + "]");
return n2o;
}
public String readAsString(XmlInfo info) {
return FileSystemUtil.getContentByUri(info.getURI());
}
public void setElementReaderFactory(NamespaceReaderFactory elementReaderFactory) {
this.elementReaderFactory = elementReaderFactory;
}
}