com.sun.jersey.api.core.ClasspathResourceConfig Maven / Gradle / Ivy
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package com.sun.jersey.api.core;
import com.sun.jersey.server.impl.container.config.AnnotatedClassScanner;
import java.io.File;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ws.rs.Path;
import javax.ws.rs.ext.Provider;
/**
* A mutable implementation of {@link DefaultResourceConfig} that dynamically
* searches for root resource and provider classes in the files and directories
* declared by the property {@link ClasspathResourceConfig#PROPERTY_CLASSPATH}.
* That property MUST be included in the map of initial properties passed to
* the constructor.
*
* @author Frank D. Martinez. [email protected]
*/
public class ClasspathResourceConfig extends DefaultResourceConfig {
/**
* The property value MUST be an instance String or String[]. Each String
* instance represents one or more paths that MUST be separated by ';'.
* Each path MUST be an absolute or relative directory, or a Jar file.
* The contents of a directory, including Java class files, jars files
* and sub-directories (recusively) are scanned. The Java class files of
* a jar file are scanned.
*
* Root resource clases MUST be present in the Java class path.
*/
public static final String PROPERTY_CLASSPATH
= "com.sun.jersey.config.property.classpath";
private static final Logger LOGGER =
Logger.getLogger(ClasspathResourceConfig.class.getName());
private final String[] paths;
public ClasspathResourceConfig() {
this(getPaths());
}
/**
* @param props the property bag that contains the property
* {@link ClasspathResourceConfig#PROPERTY_CLASSPATH}.
*/
public ClasspathResourceConfig(Map props) {
this(getPaths(props));
setPropertiesAndFeatures(props);
}
/**
* @param paths the array paths consisting of either jar files or
* directories containing jar files for class files.
*/
public ClasspathResourceConfig(String[] paths) {
super();
if (paths == null || paths.length == 0)
throw new IllegalArgumentException(
"Array of paths must not be null or empty");
this.paths = paths.clone();
init(paths);
}
/**
* Perform a new search for resource classes and provider classes.
*/
public void reload() {
getClasses().clear();
init(paths);
}
private void init(String[] paths) {
File[] roots = new File[paths.length];
for (int i = 0; i< paths.length; i++) {
roots[i] = new File(paths[i]);
}
if (LOGGER.isLoggable(Level.INFO)) {
StringBuilder b = new StringBuilder();
b.append("Scanning for root resource and provider classes in the paths:");
for (String p : paths)
b.append('\n').append(" ").append(p);
LOGGER.log(Level.INFO, b.toString());
}
AnnotatedClassScanner scanner = new AnnotatedClassScanner(
Path.class, Provider.class);
scanner.scan(roots);
getClasses().addAll(scanner.getMatchingClasses());
if (LOGGER.isLoggable(Level.INFO) && !getClasses().isEmpty()) {
StringBuilder b = new StringBuilder();
b.append("Root resource classes found:");
for (Class c : getClasses())
if (c.isAnnotationPresent(Path.class))
b.append('\n').append(" ").append(c);
LOGGER.log(Level.INFO, b.toString());
b = new StringBuilder();
b.append("Provider classes found:");
for (Class c : getClasses())
if (c.isAnnotationPresent(Provider.class))
b.append('\n').append(" ").append(c);
LOGGER.log(Level.INFO, b.toString());
}
}
private static String[] getPaths() {
String classPath = System.getProperty("java.class.path");
return classPath.split(File.pathSeparator);
}
private static String[] getPaths(Map props) {
Object v = props.get(PROPERTY_CLASSPATH);
if (v == null)
throw new IllegalArgumentException(PROPERTY_CLASSPATH +
" property is missing");
String[] paths = getPaths(v);
if (paths.length == 0)
throw new IllegalArgumentException(PROPERTY_CLASSPATH +
" contains no paths");
return paths;
}
private static String[] getPaths(Object param) {
if (param instanceof String) {
return getElements(new String[] { (String)param });
} else if (param instanceof String[]) {
return getElements((String[])param);
} else {
throw new IllegalArgumentException(PROPERTY_CLASSPATH + " must " +
"have a property value of type String or String[]");
}
}
}