CopyOnFirstWriteProperties (Hive 3.1.1 API)

java.lang.Object
- java.util.Dictionary<K,V>
- - java.util.Hashtable<Object,Object>
  - - java.util.Properties
    - - org.apache.hadoop.hive.common.CopyOnFirstWriteProperties

All Implemented Interfaces:

Serializable, Cloneable, Map<Object,Object>
```
public class CopyOnFirstWriteProperties
extends Properties
```
A special subclass of Properties, designed to save memory when many identical copies of Properties would otherwise be created. To achieve that, we use the 'interned' field, which points to the same Properties object for all instances of CopyOnFirstWriteProperties that were created with identical contents. However, as soon as any mutating method is called, contents are copied from the 'interned' properties into this instance.

See Also:

Serialized Form

Field Summary
- Fields inherited from class java.util.Properties
  defaults

Constructor Summary

Constructors
Constructor and Description

CopyOnFirstWriteProperties()

CopyOnFirstWriteProperties(Properties p)

Constructors
Constructor and Description
`CopyOnFirstWriteProperties()`
`CopyOnFirstWriteProperties(Properties p)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`clear()` Public API of java.util.Hashtable
`Object`	`clone()`
`Object`	`compute(Object key, java.util.function.BiFunction remappingFunction)`
`Object`	`computeIfAbsent(Object key, java.util.function.Function mappingFunction)`
`Object`	`computeIfPresent(Object key, java.util.function.BiFunction remappingFunction)`
`boolean`	`contains(Object value)`
`boolean`	`containsKey(Object key)`
`boolean`	`containsValue(Object value)`
`Enumeration<Object>`	`elements()`
`Set<Map.Entry<Object,Object>>`	`entrySet()`
`boolean`	`equals(Object o)`
`void`	`forEach(java.util.function.BiConsumer action)`
`Object`	`get(Object key)`
`Properties`	`getInterned()`
`Object`	`getOrDefault(Object key, Object defaultValue)`
`String`	`getProperty(String key)` Public API of java.util.Properties
`String`	`getProperty(String key, String defaultValue)`
`int`	`hashCode()`
`boolean`	`isEmpty()`
`Enumeration<Object>`	`keys()`
`Set<Object>`	`keySet()`
`void`	`list(PrintStream out)`
`void`	`list(PrintWriter out)`
`void`	`load(InputStream inStream)`
`void`	`load(Reader reader)`
`void`	`loadFromXML(InputStream inStream)`
`Object`	`merge(Object key, Object value, java.util.function.BiFunction remappingFunction)`
`Enumeration<?>`	`propertyNames()`
`Object`	`put(Object key, Object value)`
`void`	`putAll(Map<? extends Object,? extends Object> t)`
`Object`	`putIfAbsent(Object key, Object value)`
`Object`	`remove(Object key)`
`boolean`	`remove(Object key, Object value)`
`Object`	`replace(Object key, Object value)`
`boolean`	`replace(Object key, Object oldValue, Object newValue)`
`void`	`replaceAll(java.util.function.BiFunction function)`
`void`	`setInterned(Properties p)`
`Object`	`setProperty(String key, String value)`
`int`	`size()`
`void`	`store(OutputStream out, String comments)`
`void`	`storeToXML(OutputStream os, String comment)`
`void`	`storeToXML(OutputStream os, String comment, String encoding)`
`Set<String>`	`stringPropertyNames()`
`String`	`toString()`
`Collection<Object>`	`values()`

Methods inherited from class java.util.Properties
save, store

Methods inherited from class java.util.Hashtable
rehash

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

- Constructor Detail
  - CopyOnFirstWriteProperties
```
public CopyOnFirstWriteProperties(Properties p)
```
  - CopyOnFirstWriteProperties
```
public CopyOnFirstWriteProperties()
```
- Method Detail
  - getProperty
```
public String getProperty(String key)
```
    Public API of java.util.Properties
    
    Overrides:
    
    getProperty in class Properties
  - getProperty
```
public String getProperty(String key,
                          String defaultValue)
```
    Overrides:
    
    getProperty in class Properties
  - list
```
public void list(PrintStream out)
```
    Overrides:
    
    list in class Properties
  - list
```
public void list(PrintWriter out)
```
    Overrides:
    
    list in class Properties
  - load
```
public void load(InputStream inStream)
          throws IOException
```
    Overrides:
    
    load in class Properties
    
    Throws:
    
    IOException
  - load
```
public void load(Reader reader)
          throws IOException
```
    Overrides:
    
    load in class Properties
    
    Throws:
    
    IOException
  - loadFromXML
```
public void loadFromXML(InputStream inStream)
                 throws IOException
```
    Overrides:
    
    loadFromXML in class Properties
    
    Throws:
    
    IOException
  - propertyNames
```
public Enumeration<?> propertyNames()
```
    Overrides:
    
    propertyNames in class Properties
  - setProperty
```
public Object setProperty(String key,
                          String value)
```
    Overrides:
    
    setProperty in class Properties
  - store
```
public void store(OutputStream out,
                  String comments)
           throws IOException
```
    Overrides:
    
    store in class Properties
    
    Throws:
    
    IOException
  - storeToXML
```
public void storeToXML(OutputStream os,
                       String comment)
                throws IOException
```
    Overrides:
    
    storeToXML in class Properties
    
    Throws:
    
    IOException
  - storeToXML
```
public void storeToXML(OutputStream os,
                       String comment,
                       String encoding)
                throws IOException
```
    Overrides:
    
    storeToXML in class Properties
    
    Throws:
    
    IOException
  - stringPropertyNames
```
public Set<String> stringPropertyNames()
```
    Overrides:
    
    stringPropertyNames in class Properties
  - clear
```
public void clear()
```
    Public API of java.util.Hashtable
    
    Specified by:
    
    clear in interface Map<Object,Object>
    
    Overrides:
    
    clear in class Hashtable<Object,Object>
  - clone
```
public Object clone()
```
    Overrides:
    
    clone in class Hashtable<Object,Object>
  - compute
```
public Object compute(Object key,
                      java.util.function.BiFunction remappingFunction)
```
    Specified by:
    
    compute in interface Map<Object,Object>
    
    Overrides:
    
    compute in class Hashtable<Object,Object>
  - computeIfAbsent
```
public Object computeIfAbsent(Object key,
                              java.util.function.Function mappingFunction)
```
    Specified by:
    
    computeIfAbsent in interface Map<Object,Object>
    
    Overrides:
    
    computeIfAbsent in class Hashtable<Object,Object>
  - computeIfPresent
```
public Object computeIfPresent(Object key,
                               java.util.function.BiFunction remappingFunction)
```
    Specified by:
    
    computeIfPresent in interface Map<Object,Object>
    
    Overrides:
    
    computeIfPresent in class Hashtable<Object,Object>
  - contains
```
public boolean contains(Object value)
```
    Overrides:
    
    contains in class Hashtable<Object,Object>
  - containsKey
```
public boolean containsKey(Object key)
```
    Specified by:
    
    containsKey in interface Map<Object,Object>
    
    Overrides:
    
    containsKey in class Hashtable<Object,Object>
  - containsValue
```
public boolean containsValue(Object value)
```
    Specified by:
    
    containsValue in interface Map<Object,Object>
    
    Overrides:
    
    containsValue in class Hashtable<Object,Object>
  - elements
```
public Enumeration<Object> elements()
```
    Overrides:
    
    elements in class Hashtable<Object,Object>
  - entrySet
```
public Set<Map.Entry<Object,Object>> entrySet()
```
    Specified by:
    
    entrySet in interface Map<Object,Object>
    
    Overrides:
    
    entrySet in class Hashtable<Object,Object>
  - equals
```
public boolean equals(Object o)
```
    Specified by:
    
    equals in interface Map<Object,Object>
    
    Overrides:
    
    equals in class Hashtable<Object,Object>
  - forEach
```
public void forEach(java.util.function.BiConsumer action)
```
    Specified by:
    
    forEach in interface Map<Object,Object>
    
    Overrides:
    
    forEach in class Hashtable<Object,Object>
  - get
```
public Object get(Object key)
```
    Specified by:
    
    get in interface Map<Object,Object>
    
    Overrides:
    
    get in class Hashtable<Object,Object>
  - getOrDefault
```
public Object getOrDefault(Object key,
                           Object defaultValue)
```
    Specified by:
    
    getOrDefault in interface Map<Object,Object>
    
    Overrides:
    
    getOrDefault in class Hashtable<Object,Object>
  - hashCode
```
public int hashCode()
```
    Specified by:
    
    hashCode in interface Map<Object,Object>
    
    Overrides:
    
    hashCode in class Hashtable<Object,Object>
  - isEmpty
```
public boolean isEmpty()
```
    Specified by:
    
    isEmpty in interface Map<Object,Object>
    
    Overrides:
    
    isEmpty in class Hashtable<Object,Object>
  - keys
```
public Enumeration<Object> keys()
```
    Overrides:
    
    keys in class Hashtable<Object,Object>
  - keySet
```
public Set<Object> keySet()
```
    Specified by:
    
    keySet in interface Map<Object,Object>
    
    Overrides:
    
    keySet in class Hashtable<Object,Object>
  - merge
```
public Object merge(Object key,
                    Object value,
                    java.util.function.BiFunction remappingFunction)
```
    Specified by:
    
    merge in interface Map<Object,Object>
    
    Overrides:
    
    merge in class Hashtable<Object,Object>
  - put
```
public Object put(Object key,
                  Object value)
```
    Specified by:
    
    put in interface Map<Object,Object>
    
    Overrides:
    
    put in class Hashtable<Object,Object>
  - putAll
```
public void putAll(Map<? extends Object,? extends Object> t)
```
    Specified by:
    
    putAll in interface Map<Object,Object>
    
    Overrides:
    
    putAll in class Hashtable<Object,Object>
  - putIfAbsent
```
public Object putIfAbsent(Object key,
                          Object value)
```
    Specified by:
    
    putIfAbsent in interface Map<Object,Object>
    
    Overrides:
    
    putIfAbsent in class Hashtable<Object,Object>
  - remove
```
public Object remove(Object key)
```
    Specified by:
    
    remove in interface Map<Object,Object>
    
    Overrides:
    
    remove in class Hashtable<Object,Object>
  - remove
```
public boolean remove(Object key,
                      Object value)
```
    Specified by:
    
    remove in interface Map<Object,Object>
    
    Overrides:
    
    remove in class Hashtable<Object,Object>
  - replace
```
public Object replace(Object key,
                      Object value)
```
    Specified by:
    
    replace in interface Map<Object,Object>
    
    Overrides:
    
    replace in class Hashtable<Object,Object>
  - replace
```
public boolean replace(Object key,
                       Object oldValue,
                       Object newValue)
```
    Specified by:
    
    replace in interface Map<Object,Object>
    
    Overrides:
    
    replace in class Hashtable<Object,Object>
  - replaceAll
```
public void replaceAll(java.util.function.BiFunction function)
```
    Specified by:
    
    replaceAll in interface Map<Object,Object>
    
    Overrides:
    
    replaceAll in class Hashtable<Object,Object>
  - size
```
public int size()
```
    Specified by:
    
    size in interface Map<Object,Object>
    
    Overrides:
    
    size in class Hashtable<Object,Object>
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Hashtable<Object,Object>
  - values
```
public Collection<Object> values()
```
    Specified by:
    
    values in interface Map<Object,Object>
    
    Overrides:
    
    values in class Hashtable<Object,Object>
  - setInterned
```
public void setInterned(Properties p)
```
  - getInterned
```
public Properties getInterned()
```

Class CopyOnFirstWriteProperties

Field Summary

Fields inherited from class java.util.Properties

Constructor Summary

Method Summary

Methods inherited from class java.util.Properties

Methods inherited from class java.util.Hashtable

Methods inherited from class java.lang.Object

Constructor Detail

CopyOnFirstWriteProperties

CopyOnFirstWriteProperties

Method Detail

getProperty

getProperty

list

list

load

load

loadFromXML

propertyNames

setProperty

store

storeToXML

storeToXML

stringPropertyNames

clear

clone

compute

computeIfAbsent

computeIfPresent

contains

containsKey

containsValue

elements

entrySet

equals

forEach

get

getOrDefault

hashCode

isEmpty

keys

keySet

merge

put

putAll

putIfAbsent

remove

remove

replace

replace

replaceAll

size

toString

values

setInterned

getInterned