Package org.apache.lucene.util

Class SPIClassIterator<S>

  • All Implemented Interfaces:
    java.util.Iterator<java.lang.Class<? extends S>>
    public final class SPIClassIterator<S>
extends java.lang.Object
implements java.util.Iterator<java.lang.Class<? extends S>>
    Helper class for loading SPI classes from classpath (META-INF files). This is a light impl of ServiceLoader but is guaranteed to be bug-free regarding classpath order and does not instantiate or initialize the classes found.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      static <S> SPIClassIterator<S> get​(java.lang.Class<S> clazz)  
      static <S> SPIClassIterator<S> get​(java.lang.Class<S> clazz, java.lang.ClassLoader loader)  
      boolean hasNext()  
      static boolean isParentClassLoader​(java.lang.ClassLoader parent, java.lang.ClassLoader child)
      Utility method to check if some class loader is a (grand-)parent of or the same as another one.
      java.lang.Class<? extends S> next()  
      void remove()  

      • Methods inherited from class java.lang.Object

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

      • Methods inherited from interface java.util.Iterator

        forEachRemaining

    • Method Detail

      • get

        public static <S> SPIClassIterator<S> get​(java.lang.Class<S> clazz)

      • get

        public static <S> SPIClassIterator<S> get​(java.lang.Class<S> clazz,
                                          java.lang.ClassLoader loader)

      • isParentClassLoader

        public static boolean isParentClassLoader​(java.lang.ClassLoader parent,
                                          java.lang.ClassLoader child)
        Utility method to check if some class loader is a (grand-)parent of or the same as another one. This means the child will be able to load all classes from the parent, too.

      • hasNext

        public boolean hasNext()
        Specified by:
        hasNext in interface java.util.Iterator<S>

      • next

        public java.lang.Class<? extends S> next()
        Specified by:
        next in interface java.util.Iterator<S>

      • remove

        public void remove()
        Specified by:
        remove in interface java.util.Iterator<S>