SerializerCompressionDeflateWrapper (mapdb 3.0.7 API)

java.lang.Object
- org.mapdb.serializer.SerializerCompressionDeflateWrapper<E>

All Implemented Interfaces:

java.io.Serializable, java.util.Comparator<E>, Serializer<E>, GroupSerializer<E>
```
public final class SerializerCompressionDeflateWrapper<E>
extends java.lang.Object
implements GroupSerializer<E>, java.io.Serializable
```
wraps another serializer and (de)compresses its output/input using Deflate

See Also:

Serialized Form

Field Summary

Fields
Modifier and Type Field and Description

protected int compressLevel

protected byte[] dictionary

protected GroupSerializer<E> serializer
- Fields inherited from interface org.mapdb.Serializer
  BIG_DECIMAL, BIG_INTEGER, BOOLEAN, BYTE, BYTE_ARRAY, BYTE_ARRAY_DELTA, BYTE_ARRAY_DELTA2, BYTE_ARRAY_NOSIZE, CHAR, CHAR_ARRAY, CLASS, DATE, DOUBLE, DOUBLE_ARRAY, ELSA, FLOAT, FLOAT_ARRAY, ILLEGAL_ACCESS, INT_ARRAY, INTEGER, INTEGER_DELTA, INTEGER_PACKED, JAVA, LONG, LONG_ARRAY, LONG_DELTA, LONG_PACKED, RECID, RECID_ARRAY, SHORT, SHORT_ARRAY, STRING, STRING_ASCII, STRING_DELTA, STRING_DELTA2, STRING_INTERN, STRING_NOSIZE, STRING_ORIGHASH, UUID

Fields
Modifier and Type	Field and Description
`protected int`	`compressLevel`
`protected byte[]`	`dictionary`
`protected GroupSerializer<E>`	`serializer`

Constructor Summary

Constructors
Constructor and Description
`SerializerCompressionDeflateWrapper(GroupSerializer<E> serializer)`
`SerializerCompressionDeflateWrapper(GroupSerializer<E> serializer, int compressLevel, byte[] dictionary)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`int`	`compare(E o1, E o2)`
`E`	`deserialize(DataInput2 in, int available)` Deserializes and returns the content of the given `DataInput2`.
`boolean`	`equals(E a1, E a2)` Returns if the first and second arguments are equal to each other.
`boolean`	`equals(java.lang.Object o)`
`int`	`hashCode()`
`int`	`hashCode(E e, int seed)` Returns a hash code of a given non-null argument.
`boolean`	`isTrusted()` Returns if this Serializer is trusted to always read the same number of bytes as it writes for any given object being serialized/de-serialized.
`void`	`serialize(DataOutput2 out, E value)` Serializes the content of the given value into the given `DataOutput2`.
`java.lang.Object`	`valueArrayCopyOfRange(java.lang.Object vals, int from, int to)`
`java.lang.Object`	`valueArrayDeleteValue(java.lang.Object vals, int pos)`
`java.lang.Object`	`valueArrayDeserialize(DataInput2 in, int size)`
`java.lang.Object`	`valueArrayEmpty()`
`java.lang.Object`	`valueArrayFromArray(java.lang.Object[] objects)`
`E`	`valueArrayGet(java.lang.Object vals, int pos)`
`java.lang.Object`	`valueArrayPut(java.lang.Object vals, int pos, E newValue)`
`int`	`valueArraySearch(java.lang.Object keys, E key)`
`int`	`valueArraySearch(java.lang.Object keys, E key, java.util.Comparator comparator)`
`void`	`valueArraySerialize(DataOutput2 out, java.lang.Object vals)`
`int`	`valueArraySize(java.lang.Object vals)`
`java.lang.Object`	`valueArrayUpdateVal(java.lang.Object vals, int pos, E newValue)`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.mapdb.serializer.GroupSerializer
nextValue, valueArrayBinaryGet, valueArrayBinarySearch, valueArrayToArray

Methods inherited from interface org.mapdb.Serializer
clone, deserializeFromLong, fixedSize, needsAvailableSizeHint

Methods inherited from interface java.util.Comparator
comparing, comparing, comparingDouble, comparingInt, comparingLong, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

- Field Detail
  - serializer
```
protected final GroupSerializer<E> serializer
```
  - compressLevel
```
protected final int compressLevel
```
  - dictionary
```
protected final byte[] dictionary
```
- Constructor Detail
  - SerializerCompressionDeflateWrapper
```
public SerializerCompressionDeflateWrapper(GroupSerializer<E> serializer)
```
  - SerializerCompressionDeflateWrapper
```
public SerializerCompressionDeflateWrapper(GroupSerializer<E> serializer,
                                           int compressLevel,
                                           byte[] dictionary)
```
- Method Detail
  - serialize
```
public void serialize(DataOutput2 out,
                      E value)
               throws java.io.IOException
```
    Description copied from interface: Serializer
    
    Serializes the content of the given value into the given DataOutput2.
    
    Specified by:
    
    serialize in interface Serializer<E>
    
    Parameters:
    
    out - DataOutput2 to save object into
    
    value - Object to serialize
    
    Throws:
    
    java.io.IOException - in case of an I/O error
  - deserialize
```
public E deserialize(DataInput2 in,
                     int available)
              throws java.io.IOException
```
    Description copied from interface: Serializer
    
    Deserializes and returns the content of the given DataInput2.
    
    Specified by:
    
    deserialize in interface Serializer<E>
    
    Parameters:
    
    in - DataInput2 to de-serialize data from
    
    available - how many bytes that are available in the DataInput2 for reading, may be -1 (in streams) or 0 (null).
    
    Returns:
    
    the de-serialized content of the given DataInput2
    
    Throws:
    
    java.io.IOException - in case of an I/O error
  - equals
```
public boolean equals(java.lang.Object o)
```
    Specified by:
    
    equals in interface java.util.Comparator<E>
    
    Overrides:
    
    equals in class java.lang.Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object
  - isTrusted
```
public boolean isTrusted()
```
    Description copied from interface: Serializer
    
    Returns if this Serializer is trusted to always read the same number of bytes as it writes for any given object being serialized/de-serialized.
    MapDB has a relaxed record size boundary checking. It expects deserializers to read exactly as many bytes as were written during serialization. If a deserializer reads more bytes than it wrote, it might start reading others record data in store.
    Some serializers (Kryo) have problems with this. To prevent this, we can not read data directly from a store, but we must copy them into separate byte[] buffers. Thus, zero-copy optimizations are disabled by default, but can be explicitly enabled here by letting this method return true.
    This flag indicates if this serializer was 'verified' to read as many bytes as it writes. It should also be much better tested etc.
    
    Specified by:
    
    isTrusted in interface Serializer<E>
    
    Returns:
    
    if this Serializer is trusted to always read the same number of bytes as it writes for any given object being serialized/de-serialized
  - valueArraySearch
```
public int valueArraySearch(java.lang.Object keys,
                            E key)
```
    Specified by:
    
    valueArraySearch in interface GroupSerializer<E>
  - valueArraySearch
```
public int valueArraySearch(java.lang.Object keys,
                            E key,
                            java.util.Comparator comparator)
```
    Specified by:
    
    valueArraySearch in interface GroupSerializer<E>
  - valueArraySerialize
```
public void valueArraySerialize(DataOutput2 out,
                                java.lang.Object vals)
                         throws java.io.IOException
```
    Specified by:
    
    valueArraySerialize in interface GroupSerializer<E>
    
    Throws:
    
    java.io.IOException
  - valueArrayDeserialize
```
public java.lang.Object valueArrayDeserialize(DataInput2 in,
                                              int size)
                                       throws java.io.IOException
```
    Specified by:
    
    valueArrayDeserialize in interface GroupSerializer<E>
    
    Throws:
    
    java.io.IOException
  - valueArrayGet
```
public E valueArrayGet(java.lang.Object vals,
                       int pos)
```
    Specified by:
    
    valueArrayGet in interface GroupSerializer<E>
  - valueArraySize
```
public int valueArraySize(java.lang.Object vals)
```
    Specified by:
    
    valueArraySize in interface GroupSerializer<E>
  - valueArrayEmpty
```
public java.lang.Object valueArrayEmpty()
```
    Specified by:
    
    valueArrayEmpty in interface GroupSerializer<E>
  - valueArrayPut
```
public java.lang.Object valueArrayPut(java.lang.Object vals,
                                      int pos,
                                      E newValue)
```
    Specified by:
    
    valueArrayPut in interface GroupSerializer<E>
  - valueArrayUpdateVal
```
public java.lang.Object valueArrayUpdateVal(java.lang.Object vals,
                                            int pos,
                                            E newValue)
```
    Specified by:
    
    valueArrayUpdateVal in interface GroupSerializer<E>
  - valueArrayFromArray
```
public java.lang.Object valueArrayFromArray(java.lang.Object[] objects)
```
    Specified by:
    
    valueArrayFromArray in interface GroupSerializer<E>
  - valueArrayCopyOfRange
```
public java.lang.Object valueArrayCopyOfRange(java.lang.Object vals,
                                              int from,
                                              int to)
```
    Specified by:
    
    valueArrayCopyOfRange in interface GroupSerializer<E>
  - valueArrayDeleteValue
```
public java.lang.Object valueArrayDeleteValue(java.lang.Object vals,
                                              int pos)
```
    Specified by:
    
    valueArrayDeleteValue in interface GroupSerializer<E>
  - equals
```
public boolean equals(E a1,
                      E a2)
```
    Description copied from interface: Serializer
    
    Returns if the first and second arguments are equal to each other. Consequently, if both arguments are null, true is returned and if exactly one argument is null, false is returned.
    
    Specified by:
    
    equals in interface Serializer<E>
    
    Parameters:
    
    a1 - an object
    
    a2 - another object to be compared with the first object for equality
    
    Returns:
    
    if the first and second arguments are equal to each other
    
    See Also:
    
    Object.equals(Object)
  - hashCode
```
public int hashCode(E e,
                    int seed)
```
    Description copied from interface: Serializer
    
    Returns a hash code of a given non-null argument. The output of the method is affected by the given seed, allowing protection against crafted hash attacks and to provide a better distribution of hashes.
    
    Specified by:
    
    hashCode in interface Serializer<E>
    
    Parameters:
    
    e - an object
    
    seed - used to "scramble" the
    
    Returns:
    
    a hash code of a non-null argument
    
    See Also:
    
    Object.hashCode()
  - compare
```
public int compare(E o1,
                   E o2)
```
    Specified by:
    
    compare in interface java.util.Comparator<E>
    
    Specified by:
    
    compare in interface Serializer<E>

Class SerializerCompressionDeflateWrapper<E>

Field Summary

Fields inherited from interface org.mapdb.Serializer

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.mapdb.serializer.GroupSerializer

Methods inherited from interface org.mapdb.Serializer

Methods inherited from interface java.util.Comparator

Field Detail

serializer

compressLevel

dictionary

Constructor Detail

SerializerCompressionDeflateWrapper

SerializerCompressionDeflateWrapper

Method Detail

serialize

deserialize

equals

hashCode

isTrusted

valueArraySearch

valueArraySearch

valueArraySerialize

valueArrayDeserialize

valueArrayGet

valueArraySize

valueArrayEmpty

valueArrayPut

valueArrayUpdateVal

valueArrayFromArray

valueArrayCopyOfRange

valueArrayDeleteValue

equals

hashCode

compare