Package org.mapfish.print.attribute

Class JsonDatasourceAttribute

java.lang.Object

org.mapfish.print.attribute.JsonDatasourceAttribute

All Implemented Interfaces:

Attribute, ConfigurationObject

public class JsonDatasourceAttribute
extends Object
implements Attribute

A JSON data source attribute. To be declared as net.sf.jasperreports.engine.data.JsonDataSource in Jasper. Accepts only JSON objects at the root. To use it, you must pass it to a sub report like that:

 < subreport>
     ...
     < dataSourceExpression>
         < ![CDATA[$P{json_attribute}.subDataSource("path.to.list")]]>
     < /dataSourceExpression>
     < subreportExpression><![CDATA["subreport_name.jasper"]]>< /subreportExpression>
 < /subreport>
 

The expression given to the subDataSource method must select an array in the JSON structure.

Constructor Summary

Constructors

Constructor	Description
JsonDatasourceAttribute()

Method Summary

Modifier and Type	Method	Description
Object	getValue(Template template, String attributeName, PObject requestJsonAttributes)	Get the attribute value.
Class	getValueType()	Get the class of the value.
void	printClientConfig(org.json.JSONWriter json, Template template)	Write this attribute out the the json writer so that clients can know what attributes are expected.
void	setConfigName(String name)	Set the name of the attribute as set in the configuration file.
void	validate(List<Throwable> validationErrors, Configuration configuration)	validate that the configuration was correct.

Methods inherited from class java.lang.Object

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

Constructor Details

JsonDatasourceAttribute

public JsonDatasourceAttribute()

Method Details

printClientConfig

public void printClientConfig(org.json.JSONWriter json,
 Template template)
                       throws org.json.JSONException

Description copied from interface: Attribute

Write this attribute out the the json writer so that clients can know what attributes are expected.

Specified by:

printClientConfig in interface Attribute

Parameters:

json - the json writer to write to

template - the template that this attribute is part of

Throws:

org.json.JSONException

setConfigName

public void setConfigName(String name)

Description copied from interface: Attribute

Set the name of the attribute as set in the configuration file.

Specified by:

setConfigName in interface Attribute

Parameters:

name - the name of the attribute

getValueType

public Class getValueType()

Description copied from interface: Attribute

Get the class of the value.

Specified by:

getValueType in interface Attribute

Returns:

the value class

getValue

public Object getValue(@Nonnull
 Template template,
 @Nonnull
 String attributeName,
 @Nonnull
 PObject requestJsonAttributes)

Description copied from interface: Attribute

Get the attribute value.

Specified by:

getValue in interface Attribute

Parameters:

template - the template of the current request.

attributeName - the name of the attribute

requestJsonAttributes - the json data for populating the attribute values

Returns:

the value

validate

public void validate(List<Throwable> validationErrors,
 Configuration configuration)

Description copied from interface: ConfigurationObject

validate that the configuration was correct.

Specified by:

validate in interface ConfigurationObject

Parameters:

validationErrors - a list to add any detected errors to.

configuration - the containing configuration