Package org.apache.flink.table.runtime.typeutils

Class WindowKeySerializer

    • Constructor Detail

      • WindowKeySerializer

        public WindowKeySerializer​(PagedTypeSerializer<org.apache.flink.table.data.RowData> keySerializer)

    • Method Detail

      • isImmutableType

        public boolean isImmutableType()
        Specified by:
        isImmutableType in class org.apache.flink.api.common.typeutils.TypeSerializer<WindowKey>

      • duplicate

        public org.apache.flink.api.common.typeutils.TypeSerializer<WindowKey> duplicate()
        Specified by:
        duplicate in class org.apache.flink.api.common.typeutils.TypeSerializer<WindowKey>

      • createInstance

        public WindowKey createInstance()
        Specified by:
        createInstance in class org.apache.flink.api.common.typeutils.TypeSerializer<WindowKey>

      • copy

        public WindowKey copy​(WindowKey from)
        Specified by:
        copy in class org.apache.flink.api.common.typeutils.TypeSerializer<WindowKey>

      • getLength

        public int getLength()
        Specified by:
        getLength in class org.apache.flink.api.common.typeutils.TypeSerializer<WindowKey>

      • serialize

        public void serialize​(WindowKey record,
                      org.apache.flink.core.memory.DataOutputView target)
               throws IOException
        Specified by:
        serialize in class org.apache.flink.api.common.typeutils.TypeSerializer<WindowKey>
        Throws:
        IOException

      • deserialize

        public WindowKey deserialize​(org.apache.flink.core.memory.DataInputView source)
                      throws IOException
        Specified by:
        deserialize in class org.apache.flink.api.common.typeutils.TypeSerializer<WindowKey>
        Throws:
        IOException

      • deserialize

        public WindowKey deserialize​(WindowKey reuse,
                             org.apache.flink.core.memory.DataInputView source)
                      throws IOException
        Specified by:
        deserialize in class org.apache.flink.api.common.typeutils.TypeSerializer<WindowKey>
        Throws:
        IOException

      • copy

        public void copy​(org.apache.flink.core.memory.DataInputView source,
                 org.apache.flink.core.memory.DataOutputView target)
          throws IOException
        Specified by:
        copy in class org.apache.flink.api.common.typeutils.TypeSerializer<WindowKey>
        Throws:
        IOException

      • serializeToPages

        public int serializeToPages​(WindowKey record,
                            org.apache.flink.runtime.memory.AbstractPagedOutputView target)
                     throws IOException
        Actually, the return value is just for saving checkSkipReadForFixLengthPart in the mapFromPages, the cost is very small.

        TODO so, we can remove this return value for simplifying interface.

        Specified by:
        serializeToPages in class PagedTypeSerializer<WindowKey>
        Parameters:
        record - The record to serialize.
        target - The output view to write the serialized data to.
        Returns:
        Returns the skipped number of bytes.
        Throws:
        IOException - Thrown, if the serialization encountered an I/O related error. Typically raised by the output view, which may have an underlying I/O channel to which it delegates.

      • deserializeFromPages

        public WindowKey deserializeFromPages​(org.apache.flink.runtime.memory.AbstractPagedInputView source)
                               throws IOException
        Description copied from class: PagedTypeSerializer
        De-serializes a record from the given source paged input view. For consistency with serialize format, some implementations may need to skip some bytes of source before de-serializing, .e.g BinaryRowData. Typically, the content read from source should be copied out when de-serializing, and we are not expecting the underlying data from source is reused. If you have such requirement, see #mapFromPages(T, AbstractPagedInputView).
        Specified by:
        deserializeFromPages in class PagedTypeSerializer<WindowKey>
        Parameters:
        source - The input view from which to read the data.
        Returns:
        The de-serialized element.
        Throws:
        IOException - Thrown, if the de-serialization encountered an I/O related error. Typically raised by the input view, which may have an underlying I/O channel from which it reads.

      • mapFromPages

        public WindowKey mapFromPages​(WindowKey reuse,
                              org.apache.flink.runtime.memory.AbstractPagedInputView source)
                       throws IOException
        Description copied from class: PagedTypeSerializer
        Map a reused record from the given source paged input view. This method provides a possibility to achieve zero copy when de-serializing. You can either choose copy or not copy the content read from source, but we encourage to make it zero copy.

        If you choose the zero copy way, you have to deal with the lifecycle of the pages properly.

        Specified by:
        mapFromPages in class PagedTypeSerializer<WindowKey>
        Parameters:
        reuse - the reused record to be mapped
        source - The input view from which to read the data.
        Returns:
        The mapped record.
        Throws:
        IOException - Thrown, if the de-serialization encountered an I/O related error. Typically raised by the input view, which may have an underlying I/O channel from which it reads.

      • equals

        public boolean equals​(Object obj)
        Specified by:
        equals in class org.apache.flink.api.common.typeutils.TypeSerializer<WindowKey>

      • hashCode

        public int hashCode()
        Specified by:
        hashCode in class org.apache.flink.api.common.typeutils.TypeSerializer<WindowKey>

      • snapshotConfiguration

        public org.apache.flink.api.common.typeutils.TypeSerializerSnapshot<WindowKey> snapshotConfiguration()
        Specified by:
        snapshotConfiguration in class org.apache.flink.api.common.typeutils.TypeSerializer<WindowKey>