org.gcube.couchbase.helpers

Class ViewHelper

java.lang.Object

org.gcube.couchbase.helpers.ViewHelper

public class ViewHelper
extends Object

The important thing about the views is that each view has name that is constructed from the given bucket_name (or "" if not given) the field name and the datatype of the field. Couchbase Views are used as index. Example of a view of field named "title" with datatype string map : function (doc, meta) { if (doc.keys && doc.keys.title) { for (i = 0 ; i < doc.keys.title.length ; i++) { emit(doc.keys.title[i], 1); } } } reduce : _count Note that each emit gives key and 1 so if we execute the reduce function we get the number of keys very fast. If we want to query on the map only we should explicitly disable the reduce on the Query

Author:

Alex Antoniadis

Constructor Summary

Constructors

Constructor and Description
ViewHelper()

Method Summary

Methods

Modifier and Type	Method and Description
static String	constructViewName(String bucketName, String fieldName, CouchBaseDataTypesHelper.DataType datatype)
static String	constructViewName(String bucketName, String fieldName, Map<String,CouchBaseDataTypesHelper.DataType> keys)
static void	createAllIndexes(com.couchbase.client.CouchbaseClient client, String designDocumentName, Map<String,CouchBaseDataTypesHelper.DataType> keys)
static void	createAllIndexes(com.couchbase.client.CouchbaseClient client, String bucketName, String designDocumentName, Map<String,CouchBaseDataTypesHelper.DataType> keys)
static com.couchbase.client.protocol.views.ViewDesign	getDateView()
static com.couchbase.client.protocol.views.ViewDesign	getDateView(String fieldName)
static com.couchbase.client.protocol.views.ViewDesign	getDateView(String bucketName, String fieldName)
static com.couchbase.client.protocol.views.ViewDesign	getFloatView()
static com.couchbase.client.protocol.views.ViewDesign	getFloatView(String fieldName)
static com.couchbase.client.protocol.views.ViewDesign	getFloatView(String bucketName, String fieldName)
static com.couchbase.client.protocol.views.ViewDesign	getIntegerView()
static com.couchbase.client.protocol.views.ViewDesign	getIntegerView(String fieldName)
static com.couchbase.client.protocol.views.ViewDesign	getIntegerView(String bucketName, String fieldName)
static com.couchbase.client.protocol.views.ViewDesign	getStringView()
static com.couchbase.client.protocol.views.ViewDesign	getStringView(String fieldName)
static com.couchbase.client.protocol.views.ViewDesign	getStringView(String bucketName, String fieldName)
static com.couchbase.client.protocol.views.ViewDesign	getView(String fieldName, CouchBaseDataTypesHelper.DataType datatype)
static com.couchbase.client.protocol.views.ViewDesign	getView(String bucketName, String fieldName, CouchBaseDataTypesHelper.DataType datatype)
static void	main(String[] args)

Methods inherited from class java.lang.Object

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

Constructor Detail

ViewHelper

public ViewHelper()

Method Detail

createAllIndexes

public static void createAllIndexes(com.couchbase.client.CouchbaseClient client,
                    String bucketName,
                    String designDocumentName,
                    Map<String,CouchBaseDataTypesHelper.DataType> keys)

createAllIndexes

public static void createAllIndexes(com.couchbase.client.CouchbaseClient client,
                    String designDocumentName,
                    Map<String,CouchBaseDataTypesHelper.DataType> keys)

getIntegerView

public static com.couchbase.client.protocol.views.ViewDesign getIntegerView()

getFloatView

public static com.couchbase.client.protocol.views.ViewDesign getFloatView()

getDateView

public static com.couchbase.client.protocol.views.ViewDesign getDateView()

getStringView

public static com.couchbase.client.protocol.views.ViewDesign getStringView()

constructViewName

public static String constructViewName(String bucketName,
                       String fieldName,
                       Map<String,CouchBaseDataTypesHelper.DataType> keys)

constructViewName

public static String constructViewName(String bucketName,
                       String fieldName,
                       CouchBaseDataTypesHelper.DataType datatype)

getIntegerView

public static com.couchbase.client.protocol.views.ViewDesign getIntegerView(String fieldName)

getIntegerView

public static com.couchbase.client.protocol.views.ViewDesign getIntegerView(String bucketName,
                                                            String fieldName)

getFloatView

public static com.couchbase.client.protocol.views.ViewDesign getFloatView(String fieldName)

getFloatView

public static com.couchbase.client.protocol.views.ViewDesign getFloatView(String bucketName,
                                                          String fieldName)

getDateView

public static com.couchbase.client.protocol.views.ViewDesign getDateView(String fieldName)

getDateView

public static com.couchbase.client.protocol.views.ViewDesign getDateView(String bucketName,
                                                         String fieldName)

getStringView

public static com.couchbase.client.protocol.views.ViewDesign getStringView(String fieldName)

getStringView

public static com.couchbase.client.protocol.views.ViewDesign getStringView(String bucketName,
                                                           String fieldName)

getView

public static com.couchbase.client.protocol.views.ViewDesign getView(String fieldName,
                                                     CouchBaseDataTypesHelper.DataType datatype)

getView

public static com.couchbase.client.protocol.views.ViewDesign getView(String bucketName,
                                                     String fieldName,
                                                     CouchBaseDataTypesHelper.DataType datatype)

main

public static void main(String[] args)