Package com.yahoo.config.model.builder.xml

Class XmlHelper

java.lang.Object

com.yahoo.config.model.builder.xml.XmlHelper

public final class XmlHelper
extends Object

Static methods for helping dom building

Author:

bratseth

Field Summary

Fields

Modifier and Type	Field	Description
static DocumentBuilderFactory	factory

Method Summary

Modifier and Type	Method	Description
static Document	getDocument(Reader reader)
static DocumentBuilder	getDocumentBuilder()	Creates a new XML document builder.
static com.yahoo.component.ComponentId	getId(Element element)
static com.yahoo.component.ComponentSpecification	getIdRef(Element element)
static String	getIdString(Element element)	For searchers inside search chains, the id may be both a reference and an id at once, or just a reference.
static Optional<String>	getOptionalAttribute(Element element, String name)
static Optional<Element>	getOptionalChild(Element parent, String childName)
static Optional<String>	getOptionalChildValue(Element parent, String childName)
static boolean	isReference(Element element)
static String	nullIfEmpty(String attribute)
static List<String>	spaceSeparatedSymbols(String field)
static Collection<String>	spaceSeparatedSymbolsFromAttribute(Element spec, String name)
static List<String>	splitAndDiscardEmpty(String field, String regex)
static Collection<String>	valuesFromElements(Element parent, String elementName)

Methods inherited from class java.lang.Object

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

Field Detail

factory

public static final DocumentBuilderFactory factory

Method Detail

nullIfEmpty

public static String nullIfEmpty(String attribute)

getIdString

public static String getIdString(Element element)

For searchers inside search chains, the id may be both a reference and an id at once, or just a reference. In other cases, it is clear which one it is from context, so I think the difference is not worth bothering users with, unless they are XML purists in which case they will have the option of writing this correctly. - Jon

getId

public static com.yahoo.component.ComponentId getId(Element element)

getIdRef

public static com.yahoo.component.ComponentSpecification getIdRef(Element element)

getDocument

public static Document getDocument(Reader reader)

splitAndDiscardEmpty

public static List<String> splitAndDiscardEmpty(String field,
                                                String regex)

spaceSeparatedSymbols

public static List<String> spaceSeparatedSymbols(String field)

spaceSeparatedSymbolsFromAttribute

public static Collection<String> spaceSeparatedSymbolsFromAttribute(Element spec,
                                                                    String name)

valuesFromElements

public static Collection<String> valuesFromElements(Element parent,
                                                    String elementName)

isReference

public static boolean isReference(Element element)

getDocumentBuilder

public static DocumentBuilder getDocumentBuilder()

Creates a new XML document builder.

Returns:

A new DocumentBuilder instance, or null if we fail to get one.

getOptionalAttribute

public static Optional<String> getOptionalAttribute(Element element,
                                                    String name)

getOptionalChild

public static Optional<Element> getOptionalChild(Element parent,
                                                 String childName)

getOptionalChildValue

public static Optional<String> getOptionalChildValue(Element parent,
                                                     String childName)