Package com.tangosol.util.extractor

Class ChainedFragmentExtractor<T,E>

java.lang.Object
com.tangosol.util.Base
com.tangosol.util.BitHelper
com.tangosol.util.ExternalizableHelper
com.tangosol.util.extractor.AbstractExtractor<T,Fragment<E>>
com.tangosol.util.extractor.ChainedFragmentExtractor<T,E>
Type Parameters:
T - the type of the target object to extract from
All Implemented Interfaces:
CanonicallyNamed, ExternalizableLite, PortableObject, QueryMapComparator, Remote.Function<T,Fragment<E>>, Remote.ToDoubleFunction<T>, Remote.ToIntFunction<T>, Remote.ToLongFunction<T>, ValueExtractor<T,Fragment<E>>, Serializable, Comparator, Function<T,Fragment<E>>, ToDoubleFunction<T>, ToIntFunction<T>, ToLongFunction<T>
public class ChainedFragmentExtractor<T,E> extends AbstractExtractor<T,Fragment<E>> implements ExternalizableLite, PortableObject
A ValueExtractor that extracts a Fragment from a nested property of the target object.
Since:
21.06
Author:
Aleks Seovic 2021.02.22
See Also:

  • Constructor Details

    • ChainedFragmentExtractor

      public ChainedFragmentExtractor()
      Deserialization constructor.

    • ChainedFragmentExtractor

      public ChainedFragmentExtractor(ValueExtractor<? super T,? extends E> from, ValueExtractor<? super E,?>... aExtractors)
      Construct ChainedFragmentExtractor instance.
      Parameters:
      from - an extractor for the nested property to extract the fragment from
      aExtractors - an array of extractors to pass to FragmentExtractor

  • Method Details

    • extract

      public Fragment<E> extract(T target)
      Description copied from interface: ValueExtractor
      Extract the value from the passed object. The returned value may be null. For intrinsic types, the returned value is expected to be a standard wrapper type in the same manner that reflection works; for example, int would be returned as a java.lang.Integer.
      Specified by:
      extract in interface ValueExtractor<T,E>
      Overrides:
      extract in class AbstractExtractor<T,Fragment<E>>
      Parameters:
      target - the object to extract the value from
      Returns:
      the extracted value; null is an acceptable value

    • getCanonicalName

      public String getCanonicalName()
      Description copied from interface: ValueExtractor
      Return the canonical name for this extractor.

      A canonical name uniquely identifies what is to be extracted, but not how it is to be extracted. Thus two different extractor implementations with the same non-null canonical name are considered to be equal, and should reflect this in their implementations of hashCode and equals.

      Canonical names for properties are designated by their property name in camel case, for instance a Java Bean with method getFooBar would have a property named fooBar, and would have fooBar as its canonical name.

      Canonical names for zero-arg method invocations are the method name followed by ().

      Dots in a canonical name delimit one or more property/method accesses represented by a chaining ValueExtractor such as ChainedExtractor or PofExtractor(Class, PofNavigator, String).

      There is currently no canonical name format for methods which take parameters and as such they must return a canonical name of null.

      Specified by:
      getCanonicalName in interface CanonicallyNamed
      Specified by:
      getCanonicalName in interface ValueExtractor<T,E>
      Overrides:
      getCanonicalName in class AbstractExtractor<T,Fragment<E>>
      Returns:
      the extractor's canonical name, or null

    • readExternal

      public void readExternal(DataInput in) throws IOException
      Description copied from interface: ExternalizableLite
      Restore the contents of this object by loading the object's state from the passed DataInput object.
      Specified by:
      readExternal in interface ExternalizableLite
      Parameters:
      in - the DataInput stream to read data from in order to restore the state of this object
      Throws:
      IOException - if an I/O exception occurs

    • writeExternal

      public void writeExternal(DataOutput out) throws IOException
      Description copied from interface: ExternalizableLite
      Save the contents of this object by storing the object's state into the passed DataOutput object.
      Specified by:
      writeExternal in interface ExternalizableLite
      Parameters:
      out - the DataOutput stream to write the state of this object to
      Throws:
      IOException - if an I/O exception occurs

    • readExternal

      public void readExternal(PofReader in) throws IOException
      Description copied from interface: PortableObject
      Restore the contents of a user type instance by reading its state using the specified PofReader object.
      Specified by:
      readExternal in interface PortableObject
      Parameters:
      in - the PofReader from which to read the object's state
      Throws:
      IOException - if an I/O error occurs

    • writeExternal

      public void writeExternal(PofWriter out) throws IOException
      Description copied from interface: PortableObject
      Save the contents of a POF user type instance by writing its state using the specified PofWriter object.
      Specified by:
      writeExternal in interface PortableObject
      Parameters:
      out - the PofWriter to which to write the object's state
      Throws:
      IOException - if an I/O error occurs