eu.fbk.knowledgestore.elastic

Class Utility

java.lang.Object

eu.fbk.knowledgestore.elastic.Utility

public final class Utility
extends Object

If the Record format is changed all (more or less) the methods in this Class must be changed.

Author:

enrico

Constructor Summary

Constructors

Constructor and Description
Utility()

Method Summary

Modifier and Type	Method and Description
static boolean	areEquals(List<Record> expResult, List<Record> result) the 2 input Lists must be sorted.
static boolean	areEquals(Record exp, Record res) checks if the 2 Records contains the same Properties : Values.
static org.elasticsearch.index.query.FilterBuilder	buildRangeFilter(String elKey, Range item, MappingHandler mapper, URIHandler handler) Tries to build a Filter: the specified property (elKey) must match the Range item.
static org.elasticsearch.index.query.FilterBuilder	buildTermFilter(String elKey, Object item, MappingHandler mapper, URIHandler handler)
static Record	deserialize(org.elasticsearch.action.get.GetResponse response, MappingHandler mapper, URIHandler handler) Transforms the GetResponse object into a Record.
static Record	deserialize(org.elasticsearch.search.SearchHit response, MappingHandler mapper, URIHandler handler) Transforms the SearchHit object into a Record.
protected static String	literalToString(org.openrdf.model.Literal obj) transforms a Literal in a String
static org.elasticsearch.common.xcontent.XContentBuilder	serialize(Record record, URIHandler handler)
protected static org.openrdf.model.Literal	stringToLiteral(String s) transforms the given String in a Value.

Methods inherited from class java.lang.Object

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

Constructor Detail

Utility

public Utility()

Method Detail

areEquals

public static boolean areEquals(Record exp,
                                Record res)

checks if the 2 Records contains the same Properties : Values.

Parameters:

exp -

res -

Returns:

areEquals

public static boolean areEquals(List<Record> expResult,
                                List<Record> result)

the 2 input Lists must be sorted.

Parameters:

expResult -

result -

Returns:

buildTermFilter

public static org.elasticsearch.index.query.FilterBuilder buildTermFilter(String elKey,
                                                                          Object item,
                                                                          MappingHandler mapper,
                                                                          URIHandler handler)
                                                                   throws IOException

Parameters:

elKey - string that rapresents the property name (string of the URI)

item - value that the record must have in the field of the elKey

mapper - mapping of the properties in ES. can not make filters on byteArray.

Returns:

if the filter has not be created returns null else the created filter

Throws:

IOException

buildRangeFilter

public static org.elasticsearch.index.query.FilterBuilder buildRangeFilter(String elKey,
                                                                           Range item,
                                                                           MappingHandler mapper,
                                                                           URIHandler handler)
                                                                    throws IOException

Tries to build a Filter: the specified property (elKey) must match the Range item. Returns null if the method wasn't able to create filter.

Parameters:

elKey - property name.

item - Range object.

mapper -

Returns:

the builder.

Throws:

IOException

serialize

public static org.elasticsearch.common.xcontent.XContentBuilder serialize(Record record,
                                                                          URIHandler handler)
                                                                   throws IOException

Parameters:

record - record to serialize in the XContentBuilder

handler -

Returns:

XContentBuilder (json) with all the data of the record.

Throws:

IOException

deserialize

public static Record deserialize(org.elasticsearch.action.get.GetResponse response,
                                 MappingHandler mapper,
                                 URIHandler handler)
                          throws IOException

Transforms the GetResponse object into a Record.

Parameters:

response - GetResponse object that contains a document of the query's result.

mapper - mapping of the types.

Returns:

the information in the response object serialized in a Record object.

Throws:

IOException

deserialize

public static Record deserialize(org.elasticsearch.search.SearchHit response,
                                 MappingHandler mapper,
                                 URIHandler handler)
                          throws IOException

Transforms the SearchHit object into a Record.

Parameters:

response - SearchHit object that contains a document of the query's result.

mapper -

Returns:

the information in the response object serialized in a Record object.

Throws:

IOException

literalToString

protected static String literalToString(org.openrdf.model.Literal obj)

transforms a Literal in a String

Parameters:

obj - object to transform in String

Returns:

stringToLiteral

protected static org.openrdf.model.Literal stringToLiteral(String s)
                                                    throws IOException

transforms the given String in a Value.

Parameters:

s - String to transform in a Value

Returns:

Throws:

IOException