org.dspace.importer.external.datamodel

Class Query

java.lang.Object

org.dspace.importer.external.datamodel.Query

public class Query
extends Object

Represents a query to a source. Subclasses may enforce stricter typing or more verbose setting of parameters.

Author:

Roeland Dillen (roeland at atmire dot com)

Constructor Summary

Constructors

Constructor and Description
Query()

Method Summary

Modifier and Type	Method and Description
void	addParameter(String key, Object value) In the parameters variable, adds the value to the collection associated with the specified key.
protected void	addSingletonParameter(String key, Object value) In the parameters variable, adds the value to the collection associated with the specified key.
Collection	getParameter(String key) Gets the collection mapped to the specified key.
<T> T	getParameterAsClass(String key, Class<T> clazz) Retrieve a parameter as a certain given class
org.apache.commons.collections.map.MultiValueMap	getParameters() Retrieve the parameters set to this Query object
void	setParameters(org.apache.commons.collections.map.MultiValueMap parameters) Set the parameters of this query object based on a given MultiValueMap

Methods inherited from class java.lang.Object

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

Constructor Detail

Query

public Query()

Method Detail

getParameters

public org.apache.commons.collections.map.MultiValueMap getParameters()

Retrieve the parameters set to this Query object

Returns:

the MultiValueMap set to this object

addParameter

public void addParameter(String key,
                         Object value)

In the parameters variable, adds the value to the collection associated with the specified key.

Unlike a normal Map the previous value is not replaced. Instead the new value is added to the collection stored against the key.

Parameters:

key - the key to store against

value - the value to add to the collection at the key

addSingletonParameter

protected void addSingletonParameter(String key,
                                     Object value)

In the parameters variable, adds the value to the collection associated with the specified key.

Unlike addParameter(String, Object) the previous value is overridden. First, any existing values are removed, then the new value is added to the collection at the specified key

Parameters:

key - the key to store against

value - the value to add to the collection at the key

getParameterAsClass

public <T> T getParameterAsClass(String key,
                                 Class<T> clazz)

Retrieve a parameter as a certain given class

Parameters:

key - the key to retrieve the parameter from

clazz - The classtype to retrieve. (If no parameter with that class is found, a null value is returned

getParameter

public Collection getParameter(String key)

Gets the collection mapped to the specified key. This method is a convenience method to typecast the result of get(key).

Parameters:

key - the key used to retrieve the collection

Returns:

the collection mapped to the key, null if no mapping

setParameters

public void setParameters(org.apache.commons.collections.map.MultiValueMap parameters)

Set the parameters of this query object based on a given MultiValueMap

Parameters:

parameters - a MultiValueMap to set to this Query object