org.ocpsoft.rewrite.annotation.scan

Class AbstractClassFinder

java.lang.Object

org.ocpsoft.rewrite.annotation.scan.AbstractClassFinder

All Implemented Interfaces:

org.ocpsoft.common.pattern.Weighted, ClassFinder

Direct Known Subclasses:

WebClassesFinder, WebLibFinder

public abstract class AbstractClassFinder
extends Object
implements ClassFinder

Base class for implementations of the ClassFinder interface.

Author:

Christian Kaltepoth

See Also:

ClassFinder

Field Summary

Fields

Modifier and Type	Field and Description
protected ClassLoader	classLoader The ClassLoader to get classes from
protected org.ocpsoft.logging.Logger	log Common logger for all implementations
protected PackageFilter	packageFilter The filter for checking which classes to process
protected javax.servlet.ServletContext	servletContext The ServletContext

Constructor Summary

Constructors

Constructor and Description
AbstractClassFinder(javax.servlet.ServletContext servletContext, ClassLoader classLoader, PackageFilter packageFilter, ByteCodeFilter byteCodeFilter) Initialization procedure

Method Summary

Modifier and Type	Method and Description
protected static String	getClassName(String filename) Creates a FQCN from an URL representing a .class file.
protected boolean	mustProcessClass(String className) Checks if a supplied class has to be processed by checking the package name against the PackageFilter.
protected void	processClass(String className, InputStream classFileStream, ClassVisitor visitor) Handle a single class to process.
protected String	stripKnownPrefix(String str, String prefix) Strip everything up to and including a given prefix from a string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.ocpsoft.rewrite.annotation.spi.ClassFinder

findClasses

Methods inherited from interface org.ocpsoft.common.pattern.Weighted

priority

Field Detail

log

protected final org.ocpsoft.logging.Logger log

Common logger for all implementations

servletContext

protected final javax.servlet.ServletContext servletContext

The ServletContext

classLoader

protected final ClassLoader classLoader

The ClassLoader to get classes from

packageFilter

protected final PackageFilter packageFilter

The filter for checking which classes to process

Constructor Detail

AbstractClassFinder

public AbstractClassFinder(javax.servlet.ServletContext servletContext,
                           ClassLoader classLoader,
                           PackageFilter packageFilter,
                           ByteCodeFilter byteCodeFilter)

Initialization procedure

Parameters:

servletContext - The ServletContext of the web application.

classLoader - The ClassLoader to use for loading classes

packageFilter - The PackageFilter used to check if a package has to be scanned.

Method Detail

stripKnownPrefix

protected String stripKnownPrefix(String str,
                                  String prefix)

Strip everything up to and including a given prefix from a string.

Parameters:

str - The string to process

prefix - The prefix

Returns:

the stripped string or null if the prefix has not been found

getClassName

protected static String getClassName(String filename)

Creates a FQCN from an URL representing a .class file.

Parameters:

url - The path of the class file

Returns:

the FQCN of the class

mustProcessClass

protected boolean mustProcessClass(String className)

Checks if a supplied class has to be processed by checking the package name against the PackageFilter.

Parameters:

className - FQCN of the class

Returns:

true for classes to process, false for classes to ignore

processClass

protected void processClass(String className,
                            InputStream classFileStream,
                            ClassVisitor visitor)

Handle a single class to process. This method should only be called if the class name is accepted by the PackageFilter.

If classFileStream is not null the method will first try to check whether the class files may contain annotations by scanning it with the ByteCodeFilter. If no InputStream is supplied, this check will be skipped. After that the method will create an instance of the class and then call ClassVisitor#visit(Class, org.ocpsoft.prettyfaces.annotation.PrettyConfig).

Please not the the called of this method is responsible to close the supplied InputStream!

Parameters:

className - The FQCN of the class

classFileStream - The Java class file of the class (may be null)

visitor - the visitor