de.caluga.morphium

Class WriterImpl

java.lang.Object

de.caluga.morphium.WriterImpl

All Implemented Interfaces:

Writer

public class WriterImpl
extends Object
implements Writer

User: Stephan Bösebeck Date: 30.08.12 Time: 14:38

default writer implementation

See Also:

Writer

Constructor Summary

Constructors

Constructor and Description
WriterImpl()

Method Summary

Methods

Modifier and Type	Method and Description
void	delete(List lst)
void	delete(Object o)
void	delete(Query q) deletes all objects matching the given query
void	inc(Object toInc, String field, int amount) Increases a value in an existing mongo collection entry - no reading necessary.
void	inc(Query<?> query, String field, int amount, boolean insertIfNotExist, boolean multiple)
void	pushPull(boolean push, Query<?> query, String field, Object value, boolean insertIfNotExist, boolean multiple)
void	pushPullAll(boolean push, Query<?> query, String field, List<?> value, boolean insertIfNotExist, boolean multiple)
void	set(Object toSet, String field, Object value) changes an object in DB
void	set(Query<?> query, Map<String,Object> values, boolean insertIfNotExist, boolean multiple) will change an entry in mongodb-collection corresponding to given class object if query is too complex, upsert might not work!
void	setMorphium(Morphium m)
void	store(List lst) stores the given list of objects, should be entities or embedded
void	store(Object o) Stores the object, should be an entity
void	storeUsingFields(Object ent, String... fields) update an object using fields specified
void	unset(Object toSet, String field) Un-setting a value in an existing mongo collection entry - no reading necessary.

Methods inherited from class java.lang.Object

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

Constructor Detail

WriterImpl

public WriterImpl()

Method Detail

setMorphium

public void setMorphium(Morphium m)

Specified by:

setMorphium in interface Writer

store

public void store(Object o)

Description copied from interface: Writer

Stores the object, should be an entity

Specified by:

store in interface Writer

Parameters:

o -

store

public void store(List lst)

Description copied from interface: Writer

stores the given list of objects, should be entities or embedded

Specified by:

store in interface Writer

set

public void set(Object toSet,
       String field,
       Object value)

changes an object in DB

Specified by:

set in interface Writer

Parameters:

toSet -

field -

value -

storeUsingFields

public void storeUsingFields(Object ent,
                    String... fields)

Description copied from interface: Writer

update an object using fields specified

Specified by:

storeUsingFields in interface Writer

delete

public void delete(List lst)

Specified by:

delete in interface Writer

delete

public void delete(Query q)

deletes all objects matching the given query

Specified by:

delete in interface Writer

Parameters:

q -

delete

public void delete(Object o)

Specified by:

delete in interface Writer

inc

public void inc(Object toInc,
       String field,
       int amount)

Increases a value in an existing mongo collection entry - no reading necessary. Object is altered in place db.collection.update({"_id":toInc.id},{$inc:{field:amount}} attention: this alteres the given object toSet in a similar way

Specified by:

inc in interface Writer

Parameters:

toInc: - object to set the value in (or better - the corresponding entry in mongo)

field: - the field to change

amount: - the value to set

inc

public void inc(Query<?> query,
       String field,
       int amount,
       boolean insertIfNotExist,
       boolean multiple)

Specified by:

inc in interface Writer

set

public void set(Query<?> query,
       Map<String,Object> values,
       boolean insertIfNotExist,
       boolean multiple)

will change an entry in mongodb-collection corresponding to given class object if query is too complex, upsert might not work! Upsert should consist of single and-queries, which will be used to generate the object to create, unless it already exists. look at Mongodb-query documentation as well

Specified by:

set in interface Writer

Parameters:

query - - query to specify which objects should be set

values - - map fieldName->Value, which values are to be set!

insertIfNotExist - - insert, if it does not exist (query needs to be simple!)

multiple - - update several documents, if false, only first hit will be updated

unset

public void unset(Object toSet,
         String field)

Un-setting a value in an existing mongo collection entry - no reading necessary. Object is altered in place db.collection.update({"_id":toSet.id},{$unset:{field:1}} attention: this alteres the given object toSet in a similar way

Specified by:

unset in interface Writer

Parameters:

toSet: - object to set the value in (or better - the corresponding entry in mongo)

field: - field to remove from document

pushPull

public void pushPull(boolean push,
            Query<?> query,
            String field,
            Object value,
            boolean insertIfNotExist,
            boolean multiple)

Specified by:

pushPull in interface Writer

pushPullAll

public void pushPullAll(boolean push,
               Query<?> query,
               String field,
               List<?> value,
               boolean insertIfNotExist,
               boolean multiple)

Specified by:

pushPullAll in interface Writer