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java.lang.Objectliquibase.servicelocator.DefaultPackageScanClassResolver
public class DefaultPackageScanClassResolver
Default implement of PackageScanClassResolver
Field Summary | |
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protected Logger |
log
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Constructor Summary | |
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DefaultPackageScanClassResolver()
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Method Summary | |
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void |
addClassLoader(ClassLoader classLoader)
Adds the class loader to the existing loaders |
void |
addFilter(PackageScanFilter filter)
Add a filter that will be applied to all scan operations |
protected void |
addFoundClass(Class<?> type)
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protected void |
addFoundClass(String packageName,
Class<?> type)
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protected void |
addIfMatching(PackageScanFilter test,
String fqn,
Set<Class<?>> classes)
Add the class designated by the fully qualified class name provided to the set of resolved classes if and only if it is approved by the Test supplied. |
protected URL |
customResourceLocator(URL url)
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protected void |
find(PackageScanFilter test,
String packageName,
Set<Class<?>> classes)
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protected void |
findAllClasses(String packageName,
ClassLoader loader)
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Set<Class<?>> |
findByFilter(PackageScanFilter filter,
String... packageNames)
Attempts to discover classes filter by the provided filter |
Set<Class<?>> |
findImplementations(Class parent,
String... packageNames)
Attempts to discover classes that are assignable to the type provided. |
protected void |
findInAllClasses(PackageScanFilter test,
String packageName,
Set<Class<?>> classes)
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Set<ClassLoader> |
getClassLoaders()
Gets the ClassLoader instances that should be used when scanning for classes. |
protected Set<Class> |
getFoundClasses(String packageName)
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protected Enumeration<URL> |
getResources(ClassLoader loader,
String packageName)
Strategy to get the resources by the given classloader. |
protected void |
loadImplementationsInJar(String parentPackage,
InputStream parentFileStream,
ClassLoader loader,
String parentFileName,
String grandparentFileName)
Finds matching classes within a jar files that contains a folder structure matching the package structure. |
void |
removeFilter(PackageScanFilter filter)
Removes the filter |
void |
setClassLoaders(Set<ClassLoader> classLoaders)
Sets the ClassLoader instances that should be used when scanning for classes. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected final transient Logger log
Constructor Detail |
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public DefaultPackageScanClassResolver()
Method Detail |
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public void addClassLoader(ClassLoader classLoader)
PackageScanClassResolver
addClassLoader
in interface PackageScanClassResolver
classLoader
- the loader to addpublic void addFilter(PackageScanFilter filter)
PackageScanClassResolver
addFilter
in interface PackageScanClassResolver
filter
- filter to filter desired classes in all scan operationspublic void removeFilter(PackageScanFilter filter)
PackageScanClassResolver
removeFilter
in interface PackageScanClassResolver
filter
- filter to filter desired classes in all scan operationspublic Set<ClassLoader> getClassLoaders()
PackageScanClassResolver
getClassLoaders
in interface PackageScanClassResolver
public void setClassLoaders(Set<ClassLoader> classLoaders)
PackageScanClassResolver
setClassLoaders
in interface PackageScanClassResolver
classLoaders
- loaders to use when scanning for classespublic Set<Class<?>> findImplementations(Class parent, String... packageNames)
PackageScanClassResolver
findImplementations
in interface PackageScanClassResolver
parent
- the class of interface to find subclasses or implementations ofpackageNames
- one or more package names to scan (including subpackages) for classes
public Set<Class<?>> findByFilter(PackageScanFilter filter, String... packageNames)
PackageScanClassResolver
findByFilter
in interface PackageScanClassResolver
filter
- filter to filter desired classes.packageNames
- one or more package names to scan (including subpackages) for classes
protected void find(PackageScanFilter test, String packageName, Set<Class<?>> classes)
protected void findAllClasses(String packageName, ClassLoader loader)
protected void findInAllClasses(PackageScanFilter test, String packageName, Set<Class<?>> classes)
protected void addFoundClass(Class<?> type)
protected void addFoundClass(String packageName, Class<?> type)
protected Set<Class> getFoundClasses(String packageName)
protected URL customResourceLocator(URL url) throws IOException
IOException
protected Enumeration<URL> getResources(ClassLoader loader, String packageName) throws IOException
WebSpherePackageScanClassResolver
to take care of WebSphere's odditiy of resource loading.
loader
- the classloaderpackageName
- the packagename for the package to load
IOException
- is thrown by the classloaderprotected void loadImplementationsInJar(String parentPackage, InputStream parentFileStream, ClassLoader loader, String parentFileName, String grandparentFileName) throws IOException
parentPackage
- the parent package under which classes must be in order to
be consideredparentFileStream
- the inputstream of the jar file to be examined for classesloader
- a classloader which can load classes contained within the JAR fileparentFileName
- a unique name for the parentFileStream, to be used for caching.
This is the URL of the parentFileStream, if it comes from a URL,
or a composite ID if we are currently examining a nested JAR.
IOException
protected void addIfMatching(PackageScanFilter test, String fqn, Set<Class<?>> classes)
test
- the test used to determine if the class matchesfqn
- the fully qualified name of a class
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