package org.drools.compiler.kproject.xml;
import org.drools.compiler.kproject.ReleaseIdImpl;
import org.kie.api.builder.ReleaseId;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import java.io.InputStream;
public class MinimalPomParser extends DefaultHandler {
private int depth;
private PomModel model;
private StringBuilder characters;
private String pomGroupId;
private String pomArtifactId;
private String pomVersion;
private String currentGroupId;
private String currentArtifactId;
private String currentVersion;
private String currentScope;
private MinimalPomParser() {
model = new PomModel();
}
public static PomModel parse(String path, InputStream is) {
MinimalPomParser handler = new MinimalPomParser();
try {
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setValidating( false );
factory.setNamespaceAware( false );
SAXParser parser = factory.newSAXParser();
parser.parse( is, handler );
} catch (Exception e) {
throw new RuntimeException("Unable to parse File '" + path + "'", e);
}
return handler.getPomModel();
}
public PomModel getPomModel() {
return this.model;
}
public void startElement(final String uri,
final String localName,
final String qname,
final Attributes attrs) throws SAXException {
if ( "groupId".equals( qname ) || "artifactId".equals( qname ) || "version".equals( qname ) ) {
this.characters = new StringBuilder();
}
depth++;
}
public void endElement(final String uri,
final String localName,
final String qname) throws SAXException {
if ( "project".equals( qname ) ) {
ReleaseId parentReleaseId = model.getParentReleaseId();
model.setReleaseId(new ReleaseIdImpl(pomGroupId != null ? pomGroupId : parentReleaseId.getGroupId(),
pomArtifactId,
pomVersion != null ? pomVersion : parentReleaseId.getVersion()));
} else if ( "parent".equals( qname ) ) {
if ( currentGroupId != null && currentArtifactId != null && currentVersion != null ) {
model.setParentReleaseId(new ReleaseIdImpl(currentGroupId, currentArtifactId, currentVersion));
}
currentGroupId = null;
currentArtifactId = null;
currentVersion = null;
} else if ( "dependency".equals( qname ) ) {
if ( !"provided".equals(currentScope) && !"test".equals(currentScope) &&
currentGroupId != null && currentArtifactId != null && currentVersion != null ) {
model.addDependency(new ReleaseIdImpl(currentGroupId, currentArtifactId, currentVersion));
}
currentGroupId = null;
currentArtifactId = null;
currentVersion = null;
currentScope = null;
} else {
String text = ( this.characters != null ) ? this.characters.toString() : null;
if ( text != null) {
if ( "groupId".equals( qname ) ) {
if ( depth == 2 ) {
pomGroupId = text;
} else {
currentGroupId = text;
}
} else if ( "artifactId".equals( qname ) ) {
if ( depth == 2 ) {
pomArtifactId = text;
} else {
currentArtifactId = text;
}
} else if ( "version".equals( qname ) ) {
if ( depth == 2 ) {
pomVersion = text;
} else {
currentVersion = text;
}
} else if ( "scope".equals( qname ) ) {
currentScope = text;
}
}
}
this.characters = null;
depth--;
}
/**
* @param chars
* @param start
* @param len
* @see org.xml.sax.ContentHandler
*/
public void characters(final char[] chars,
final int start,
final int len) {
if ( this.characters != null ) {
this.characters.append( chars,
start,
len );
}
}
}