package bndtools.bndplugins.analysis.spring;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import aQute.bnd.service.AnalyzerPlugin;
import aQute.bnd.service.Plugin;
import aQute.lib.osgi.Analyzer;
import aQute.lib.osgi.Jar;
import aQute.lib.osgi.Resource;
import aQute.libg.reporter.Reporter;
/**
* This component is called when we find a resource in the META-INF/*.xml
* pattern. We parse the resource and and the imports to the builder.
*
* Parsing is done with XSLT (first time I see the use of having XML for the
* Spring configuration files!).
*
* @author aqute
*
*/
public class SpringComponent implements AnalyzerPlugin, Plugin {
static final String PROPNAME_PREFIX_PATTERN = "pattern";
static final Pattern[] DEFAULT_SPRING_PATTERNS = new Pattern[] { Pattern.compile("META-INF/spring/.*\\.xml") };
static final Pattern QN = Pattern.compile("[_A-Za-z$][_A-Za-z0-9$]*(\\.[_A-Za-z$][_A-Za-z0-9$]*)*");
static Transformer transformer;
private Reporter reporter;
private Map<String, String> properties;
public static Set<CharSequence> analyze(InputStream in) throws Exception {
if (transformer == null) {
TransformerFactory tf = TransformerFactory.newInstance();
Source source = new StreamSource(SpringComponent.class.getResourceAsStream("extract.xsl"));
transformer = tf.newTransformer(source);
}
Set<CharSequence> refers = new HashSet<CharSequence>();
ByteArrayOutputStream bout = new ByteArrayOutputStream();
Result r = new StreamResult(bout);
Source s = new StreamSource(in);
transformer.transform(s, r);
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
bout.close();
BufferedReader br = new BufferedReader(new InputStreamReader(bin));
String line = br.readLine();
while (line != null) {
line = line.trim();
if (line.length() > 0) {
String parts[] = line.split("\\s*,\\s*");
for (int i = 0; i < parts.length; i++) {
int n = parts[i].lastIndexOf('.');
if (n > 0) {
refers.add(parts[i].subSequence(0, n));
}
}
}
line = br.readLine();
}
br.close();
return refers;
}
public void setProperties(Map<String, String> map) {
this.properties = map;
}
public void setReporter(Reporter reporter) {
this.reporter = reporter;
}
private Pattern[] getSourcePatterns(Reporter reporter) {
Pattern[] result = DEFAULT_SPRING_PATTERNS;
if(properties != null) {
List<Pattern> patterns = new ArrayList<Pattern>(properties.size());
for (Entry<String, String> propertyEntry : properties.entrySet()) {
if(propertyEntry.getKey().startsWith(PROPNAME_PREFIX_PATTERN)) {
String patternStr = propertyEntry.getValue();
try {
Pattern pattern = Pattern.compile(patternStr);
patterns.add(pattern);
} catch (PatternSyntaxException e) {
if(reporter != null)
reporter.error("Invalid regular expression: %s", patternStr);
}
}
}
result = patterns.toArray(new Pattern[patterns.size()]);
}
return result;
}
public boolean analyzeJar(Analyzer analyzer) throws Exception {
Jar jar = analyzer.getJar();
Map<String, Resource> resources = jar.getResources();
Pattern[] patterns = getSourcePatterns(analyzer);
for (Entry<String, Resource> entry : resources.entrySet()) {
String path = entry.getKey();
Resource resource = entry.getValue();
boolean match = false;
for (Pattern pattern : patterns) {
if (pattern.matcher(path).matches()) {
match = true;
break;
}
}
if (match) {
try {
InputStream in = resource.openInputStream();
Set<CharSequence> set = analyze(in);
in.close();
for (Iterator<CharSequence> r = set.iterator(); r.hasNext();) {
String pack = (String) r.next();
if (!QN.matcher(pack).matches())
analyzer.warning("Package does not seem a package in spring resource (" + path + "): " + pack);
if (!analyzer.getReferred().containsKey(pack))
analyzer.getReferred().put(pack, new LinkedHashMap<String, String>());
}
} catch (Exception e) {
analyzer.error("Unexpected exception in processing spring resources(" + path + "): " + e);
}
}
}
return false;
}
}