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package com.sun.enterprise.tools.verifier.apiscan.classfile;
import java.io.IOException;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Collection;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* This is the base class for classes that actually implement ClosureCompiler
* interface, i.e. {@link BCELClosureCompilerImpl} and
* {@link ASMClosureCompilerImpl}.
* It contains common implementation for above classes.
*
* @author Sanjeeb.Sahoo@Sun.COM
*/
public abstract class ClosureCompilerImplBase implements ClosureCompiler {
protected ClassFileLoader loader;
protected HashSet<String> excludedClasses = new HashSet<String>();
protected HashSet<String> excludedPackages = new HashSet<String>();
protected HashSet<String> excludedPatterns = new HashSet<String>();
protected HashSet<String> visitedClasses = new HashSet<String>();
private static String resourceBundleName = "com.sun.enterprise.tools.verifier.apiscan.LocalStrings";
protected static Logger logger = Logger.getLogger("apiscan.classfile", resourceBundleName); // NOI18N
// used for logging
private static final String myClassName = "ClosureCompilerImplBase"; // NOI18N
/**
* @param loader the ClassFileLoader that is used to load the referenced
* classes.
*/
protected ClosureCompilerImplBase(ClassFileLoader loader) {
this.loader = loader;
}
/**
* @param className the class name to be excluded from closure
* computation. It is in the external class name format
* (i.e. java.util.Map$Entry instead of java.util.Map.Entry).
* When the closure compiler sees a class matches this
* name, it does not try to compute its closure any
* more. It merely adds this name to the closure. So the
* final closure will contain this class name, but not
* its dependencies.
*/
public void addExcludedClass(String className) {
excludedClasses.add(className);
}
/**
* @param pkgName the package name of classes to be excluded from
* closure computation. It is in the external format
* (i.e. java.lang (See no trailing '.'). When the
* closure compiler sees a class whose package name
* matches this name, it does not try to compute the
* closure of that class any more. It merely adds that
* class name to the closure. So the final closure will
* contain that class name, but not its dependencies.
*/
public void addExcludedPackage(String pkgName) {
excludedPackages.add(pkgName);
}
/**
* @param pattern the pattern for the names of classes to be excluded from
* closure computation. It is in the external format (i.e.
* org.apache.). When the closure compiler sees a class whose
* name begins with this pattern, it does not try to compute
* the closure of that class any more. It merely adds that
* class name to the closure. So the final closure will
* contain that class name, but not its dependencies. Among
* all the excluded list, it is given the lowest priority in
* search order.
*/
public void addExcludedPattern(String pattern) {
excludedPatterns.add(pattern);
}
/**
* @param jar whose classes it will try to build closure of. This is a
* convenience method which iterates over all the entries in a
* jar file and computes their closure.
*/
public boolean buildClosure(java.util.jar.JarFile jar) throws IOException {
boolean result = true;
for (java.util.Enumeration entries = jar.entries();
entries.hasMoreElements();) {
String clsName = ((java.util.jar.JarEntry) entries.nextElement()).getName();
if (clsName.endsWith(".class")) { // NOI18N
String externalClsName = clsName.substring(0,
clsName.lastIndexOf(".class")) // NOI18N
.replace('/', '.');
boolean newresult = this.buildClosure(externalClsName);
result = newresult && result;
}
}//for all jar entries
return result;
}
public Collection<String> getNativeMethods() {
throw new UnsupportedOperationException();
}
/**
* @param className name of class in external format.
* @return
*/
protected boolean needToBuildClosure(String className) {
boolean result = true;
if (visitedClasses.contains(className))
result = false;
else if (excludedClasses.contains(className)) {
result = false;
} else if (excludedPackages.contains(getPackageName(className))) {
result = false;
} else {
for (Iterator i = excludedPatterns.iterator(); i.hasNext();) {
String pattern = (String) i.next();
if (className.startsWith(pattern)) {
result = false;
break;
}
}
}
logger.logp(Level.FINEST, myClassName, "needToBuildClosure", // NOI18N
className + " " + result); // NOI18N
return result;
}
/**
* @param className name of class in external format.
* @return package name in dotted format, e.g. java.lang for java.lang.void
*/
protected static String getPackageName(String className) {
int idx = className.lastIndexOf('.');
if (idx != -1) {
return className.substring(0, idx);
} else
return "";
}
}
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