Package ddf.catalog.transformer.csv.common

Class CsvTransformer

java.lang.Object

ddf.catalog.transformer.csv.common.CsvTransformer

public class CsvTransformer
extends Object

Common Library used to transform Metacards into CSV text.

See Also:

• MetacardTransformer
• Metacard
• QueryResponseTransformer
• QueryResponse
• Attribute

Method Summary

Modifier and Type	Method	Description
static ddf.catalog.data.BinaryContent	createResponse(Appendable csv)
static Set<ddf.catalog.data.AttributeDescriptor>	getAllCsvAttributeDescriptors(List<ddf.catalog.data.Metacard> metacards)	Given a list of Metacards, returns a set of AttributeDescriptors that contains all attributes that exist on the given metacard types.
static Set<ddf.catalog.data.AttributeDescriptor>	getNonEmptyValueAttributes(List<ddf.catalog.data.Metacard> metacards)	Given a list of Metacards, return only the attribute descriptors that have a non-empty value.
static Set<ddf.catalog.data.AttributeDescriptor>	getOnlyRequestedAttributes(List<ddf.catalog.data.Metacard> metacards, Set<String> requestedAttributes)	Given a list of Metacards and a string set of requested attributes, returns a set of AttributeDescriptors containing the requested attributes.
static List<ddf.catalog.data.AttributeDescriptor>	sortAttributes(Set<ddf.catalog.data.AttributeDescriptor> attributeSet, List<String> attributeOrder)
static Appendable	writeMetacardsToCsv(List<ddf.catalog.data.Metacard> metacards, List<ddf.catalog.data.AttributeDescriptor> orderedAttributeDescriptors, Map<String,String> aliasMap)

Methods inherited from class java.lang.Object

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

Method Details

createResponse

public static ddf.catalog.data.BinaryContent createResponse(Appendable csv)

writeMetacardsToCsv

public static Appendable writeMetacardsToCsv(List<ddf.catalog.data.Metacard> metacards,
 List<ddf.catalog.data.AttributeDescriptor> orderedAttributeDescriptors,
 Map<String,String> aliasMap)
                                      throws ddf.catalog.transform.CatalogTransformerException

Throws:

ddf.catalog.transform.CatalogTransformerException

sortAttributes

public static List<ddf.catalog.data.AttributeDescriptor> sortAttributes(Set<ddf.catalog.data.AttributeDescriptor> attributeSet,
 List<String> attributeOrder)

getAllCsvAttributeDescriptors

public static Set<ddf.catalog.data.AttributeDescriptor> getAllCsvAttributeDescriptors(List<ddf.catalog.data.Metacard> metacards)

Given a list of Metacards, returns a set of AttributeDescriptors that contains all attributes that exist on the given metacard types. Object and Binary types are excluded

Parameters:

metacards - List of metacards from which to extract attribute descriptors

Returns:

a Set of s that are on each metacard

getOnlyRequestedAttributes

public static Set<ddf.catalog.data.AttributeDescriptor> getOnlyRequestedAttributes(List<ddf.catalog.data.Metacard> metacards,
 Set<String> requestedAttributes)

Given a list of Metacards and a string set of requested attributes, returns a set of AttributeDescriptors containing the requested attributes.

getNonEmptyValueAttributes

public static Set<ddf.catalog.data.AttributeDescriptor> getNonEmptyValueAttributes(List<ddf.catalog.data.Metacard> metacards)

Given a list of Metacards, return only the attribute descriptors that have a non-empty value. Returns a set of AttributeDescriptors containing the attributes with non-empty values.