liquibase.servicelocator
public class DefaultPackageScanClassResolver extends java.lang.Object implements PackageScanClassResolver
PackageScanClassResolver
Constructor and Description |
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DefaultPackageScanClassResolver() |
Modifier and Type | Method and Description |
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void |
addClassLoader(java.lang.ClassLoader classLoader)
Adds the class loader to the existing loaders
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void |
addFilter(PackageScanFilter filter)
Add a filter that will be applied to all scan operations
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protected void |
addIfMatching(PackageScanFilter test,
java.lang.String fqn,
java.util.Set<java.lang.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.
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protected java.net.URL |
customResourceLocator(java.net.URL url) |
protected void |
find(PackageScanFilter test,
java.lang.String packageName,
java.lang.ClassLoader loader,
java.util.Set<java.lang.Class<?>> classes) |
protected void |
find(PackageScanFilter test,
java.lang.String packageName,
java.util.Set<java.lang.Class<?>> classes) |
java.util.Set<java.lang.Class<?>> |
findByFilter(PackageScanFilter filter,
java.lang.String... packageNames)
Attempts to discover classes filter by the provided filter
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java.util.Set<java.lang.Class<?>> |
findImplementations(java.lang.Class parent,
java.lang.String... packageNames)
Attempts to discover classes that are assignable to the type provided.
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java.util.Set<java.lang.ClassLoader> |
getClassLoaders()
Gets the ClassLoader instances that should be used when scanning for classes.
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protected java.util.Enumeration<java.net.URL> |
getResources(java.lang.ClassLoader loader,
java.lang.String packageName)
Strategy to get the resources by the given classloader.
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protected void |
loadImplementationsInJar(PackageScanFilter test,
java.lang.String parent,
java.io.InputStream stream,
java.lang.String urlPath,
java.util.Set<java.lang.Class<?>> classes)
Finds matching classes within a jar files that contains a folder
structure matching the package structure.
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void |
removeFilter(PackageScanFilter filter)
Removes the filter
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void |
setClassLoaders(java.util.Set<java.lang.ClassLoader> classLoaders)
Sets the ClassLoader instances that should be used when scanning for
classes.
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protected final transient Logger log
public void addClassLoader(java.lang.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 java.util.Set<java.lang.ClassLoader> getClassLoaders()
PackageScanClassResolver
getClassLoaders
in interface PackageScanClassResolver
public void setClassLoaders(java.util.Set<java.lang.ClassLoader> classLoaders)
PackageScanClassResolver
setClassLoaders
in interface PackageScanClassResolver
classLoaders
- loaders to use when scanning for classespublic java.util.Set<java.lang.Class<?>> findImplementations(java.lang.Class parent, java.lang.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 classespublic java.util.Set<java.lang.Class<?>> findByFilter(PackageScanFilter filter, java.lang.String... packageNames)
PackageScanClassResolver
findByFilter
in interface PackageScanClassResolver
filter
- filter to filter desired classes.packageNames
- one or more package names to scan (including subpackages) for classesprotected void find(PackageScanFilter test, java.lang.String packageName, java.util.Set<java.lang.Class<?>> classes)
protected void find(PackageScanFilter test, java.lang.String packageName, java.lang.ClassLoader loader, java.util.Set<java.lang.Class<?>> classes)
protected java.net.URL customResourceLocator(java.net.URL url) throws java.io.IOException
java.io.IOException
protected java.util.Enumeration<java.net.URL> getResources(java.lang.ClassLoader loader, java.lang.String packageName) throws java.io.IOException
WebSpherePackageScanClassResolver
to take care of WebSphere's odditiy of resource loading.loader
- the classloaderpackageName
- the packagename for the package to loadjava.io.IOException
- is thrown by the classloaderprotected void loadImplementationsInJar(PackageScanFilter test, java.lang.String parent, java.io.InputStream stream, java.lang.String urlPath, java.util.Set<java.lang.Class<?>> classes)
test
- a Test used to filter the classes that are discoveredparent
- the parent package under which classes must be in order to
be consideredstream
- the inputstream of the jar file to be examined for classesurlPath
- the url of the jar file to be examined for classesprotected void addIfMatching(PackageScanFilter test, java.lang.String fqn, java.util.Set<java.lang.Class<?>> classes)
test
- the test used to determine if the class matchesfqn
- the fully qualified name of a class