Context (Solr 4.8.0 API)

java.lang.Object
- org.apache.solr.handler.dataimport.Context

Direct Known Subclasses:

ContextImpl
```
public abstract class Context
extends Object
```
This abstract class gives access to all available objects. So any component implemented by a user can have the full power of DataImportHandler

Refer to http://wiki.apache.org/solr/DataImportHandler for more details.

This API is experimental and subject to change

Since:

solr 1.3

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`DELTA_DUMP`
`static String`	`FIND_DELTA`
`static String`	`FULL_DUMP`
`static String`	`SCOPE_DOC` An object stored in document scope is available for the current document only but across entities.
`static String`	`SCOPE_ENTITY` An object stored in entity scope is valid only for the current entity for the current document only.
`static String`	`SCOPE_GLOBAL` An object stored in global scope is available for the current import only but across entities and documents.
`static String`	`SCOPE_SOLR_CORE` An object stored in 'solrcore' scope is available across imports, entities and documents throughout the life of a solr core.

Constructor Summary

Constructors
Constructor and Description

Context()

Constructors
Constructor and Description
`Context()`

Method Summary

Methods
Modifier and Type	Method and Description
`abstract String`	`currentProcess()` Returns the current process FULL_DUMP, DELTA_DUMP, FIND_DELTA
`abstract void`	`deleteDoc(String id)` delete a document by id
`abstract void`	`deleteDocByQuery(String query)` delete documents by query
`abstract List<Map<String,String>>`	`getAllEntityFields()` Returns all the fields put into an entity.
`abstract DataSource`	`getDataSource()` Gets the datasource instance defined for this entity.
`abstract DataSource`	`getDataSource(String name)` Gets a new DataSource instance with a name.
`abstract String`	`getEntityAttribute(String name)` Get the value of any attribute put into this entity
`abstract EntityProcessor`	`getEntityProcessor()` Returns the instance of EntityProcessor used for this entity
`abstract Context`	`getParentContext()` Get the context instance for the parent entity.
`abstract Map<String,Object>`	`getRequestParameters()` The request parameters passed over HTTP for this command the values in the map are either String(for single valued parameters) or List<String> (for multi-valued parameters)
`abstract String`	`getResolvedEntityAttribute(String name)` Get the value of any attribute put into this entity after resolving all variables found in the attribute value
`abstract String`	`getScript()` Returns the text specified in the script tag in the data-config.xml
`abstract String`	`getScriptLanguage()` Returns the language of the script as specified in the script tag in data-config.xml
`abstract Object`	`getSessionAttribute(String name, String scope)` get a value by name in the given scope (entity, document,global)
`abstract SolrCore`	`getSolrCore()` Exposing the actual SolrCore to the components
`abstract Map<String,Object>`	`getStats()` Makes available some basic running statistics such as "docCount", "deletedDocCount", "rowCount", "queryCount" and "skipDocCount"
`abstract VariableResolver`	`getVariableResolver()` Returns the VariableResolver used in this entity which can be used to resolve the tokens in ${<namespce.name>}
`abstract boolean`	`isRootEntity()` Returns if the current entity is the root entity
`abstract String`	`replaceTokens(String template)` Resolve variables in a template
`abstract Object`	`resolve(String var)` Use this directly to resolve variable
`abstract void`	`setSessionAttribute(String name, Object val, String scope)` Store values in a certain name and scope (entity, document,global)

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

- Field Detail
  - FULL_DUMP
```
public static final String FULL_DUMP
```
    See Also:
    Constant Field Values
  - DELTA_DUMP
```
public static final String DELTA_DUMP
```
    See Also:
    Constant Field Values
  - FIND_DELTA
```
public static final String FIND_DELTA
```
    See Also:
    Constant Field Values
  - SCOPE_ENTITY
```
public static final String SCOPE_ENTITY
```
    An object stored in entity scope is valid only for the current entity for the current document only.
    
    See Also:
    Constant Field Values
  - SCOPE_GLOBAL
```
public static final String SCOPE_GLOBAL
```
    An object stored in global scope is available for the current import only but across entities and documents.
    
    See Also:
    Constant Field Values
  - SCOPE_DOC
```
public static final String SCOPE_DOC
```
    An object stored in document scope is available for the current document only but across entities.
    
    See Also:
    Constant Field Values
  - SCOPE_SOLR_CORE
```
public static final String SCOPE_SOLR_CORE
```
    An object stored in 'solrcore' scope is available across imports, entities and documents throughout the life of a solr core. A solr core unload or reload will destroy this data.
    
    See Also:
    Constant Field Values
- Constructor Detail
  - Context
```
public Context()
```
- Method Detail
  - getEntityAttribute
```
public abstract String getEntityAttribute(String name)
```
    Get the value of any attribute put into this entity
    
    Parameters:
    name - name of the attribute eg: 'name'
    
    Returns:
    value of named attribute in entity
  - getResolvedEntityAttribute
```
public abstract String getResolvedEntityAttribute(String name)
```
    Get the value of any attribute put into this entity after resolving all variables found in the attribute value
    
    Parameters:
    name - name of the attribute
    
    Returns:
    value of the named attribute after resolving all variables
  - getAllEntityFields
```
public abstract List<Map<String,String>> getAllEntityFields()
```
    Returns all the fields put into an entity. each item (which is a map ) in the list corresponds to one field. each if the map contains the attribute names and values in a field
    
    Returns:
    all fields in an entity
  - getVariableResolver
```
public abstract VariableResolver getVariableResolver()
```
    Returns the VariableResolver used in this entity which can be used to resolve the tokens in ${<namespce.name>}
    
    Returns:
    a VariableResolver instance
    See Also:
    VariableResolver
  - getDataSource
```
public abstract DataSource getDataSource()
```
    Gets the datasource instance defined for this entity. Do not close() this instance. Transformers should use the getDataSource(String name) method.
    
    Returns:
    a new DataSource instance as configured for the current entity
    See Also:
    DataSource, getDataSource(String)
  - getDataSource
```
public abstract DataSource getDataSource(String name)
```
    Gets a new DataSource instance with a name. Ensure that you close() this after use because this is created just for this method call.
    
    Parameters:
    name - Name of the dataSource as defined in the dataSource tag
    
    Returns:
    a new DataSource instance
    See Also:
    DataSource
  - getEntityProcessor
```
public abstract EntityProcessor getEntityProcessor()
```
    Returns the instance of EntityProcessor used for this entity
    
    Returns:
    instance of EntityProcessor used for the current entity
    See Also:
    EntityProcessor
  - setSessionAttribute
```
public abstract void setSessionAttribute(String name,
                       Object val,
                       String scope)
```
    Store values in a certain name and scope (entity, document,global)
    
    Parameters:
    name - the key
    val - the value
    scope - the scope in which the given key, value pair is to be stored
  - getSessionAttribute
```
public abstract Object getSessionAttribute(String name,
                         String scope)
```
    get a value by name in the given scope (entity, document,global)
    
    Parameters:
    name - the key
    scope - the scope from which the value is to be retrieved
    
    Returns:
    the object stored in the given scope with the given key
  - getParentContext
```
public abstract Context getParentContext()
```
    Get the context instance for the parent entity. works only in the full dump If the current entity is rootmost a null is returned
    
    Returns:
    parent entity's Context
  - getRequestParameters
```
public abstract Map<String,Object> getRequestParameters()
```
    The request parameters passed over HTTP for this command the values in the map are either String(for single valued parameters) or List<String> (for multi-valued parameters)
    
    Returns:
    the request parameters passed in the URL to initiate this process
  - isRootEntity
```
public abstract boolean isRootEntity()
```
    Returns if the current entity is the root entity
    
    Returns:
    true if current entity is the root entity, false otherwise
  - currentProcess
```
public abstract String currentProcess()
```
    Returns the current process FULL_DUMP, DELTA_DUMP, FIND_DELTA
    
    Returns:
    the type of the current running process
  - getSolrCore
```
public abstract SolrCore getSolrCore()
```
    Exposing the actual SolrCore to the components
    
    Returns:
    the core
  - getStats
```
public abstract Map<String,Object> getStats()
```
    Makes available some basic running statistics such as "docCount", "deletedDocCount", "rowCount", "queryCount" and "skipDocCount"
    
    Returns:
    a Map containing running statistics of the current import
  - getScript
```
public abstract String getScript()
```
    Returns the text specified in the script tag in the data-config.xml
  - getScriptLanguage
```
public abstract String getScriptLanguage()
```
    Returns the language of the script as specified in the script tag in data-config.xml
  - deleteDoc
```
public abstract void deleteDoc(String id)
```
    delete a document by id
  - deleteDocByQuery
```
public abstract void deleteDocByQuery(String query)
```
    delete documents by query
  - resolve
```
public abstract Object resolve(String var)
```
    Use this directly to resolve variable
    
    Parameters:
    var - the variable name
    
    Returns:
    the resolved value
  - replaceTokens
```
public abstract String replaceTokens(String template)
```
    Resolve variables in a template
    
    Returns:
    The string w/ variables resolved

Class Context

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

FULL_DUMP

DELTA_DUMP

FIND_DELTA

SCOPE_ENTITY

SCOPE_GLOBAL

SCOPE_DOC

SCOPE_SOLR_CORE

Constructor Detail

Context

Method Detail

getEntityAttribute

getResolvedEntityAttribute

getAllEntityFields

getVariableResolver

getDataSource

getDataSource

getEntityProcessor

setSessionAttribute

getSessionAttribute

getParentContext

getRequestParameters

isRootEntity

currentProcess

getSolrCore

getStats

getScript

getScriptLanguage

deleteDoc

deleteDocByQuery

resolve

replaceTokens