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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.model.builder.xml.dom.chains;
import com.yahoo.component.ComponentSpecification;
import com.yahoo.component.chain.model.ChainSpecification;
import com.yahoo.config.model.builder.xml.XmlHelper;
import com.yahoo.text.XML;
import org.w3c.dom.Element;
import java.util.*;
/**
* Build an Inheritance object from an inheritance section.
* @author tonytv
*/
public class InheritanceBuilder {
final ChainSpecification.Inheritance inheritance;
public InheritanceBuilder(Element spec) {
inheritance = new ChainSpecification.Inheritance(
// XXX: for this to work, the tagname in the spec must match the tagname inside the 'inherits' elem, e.g. 'searchchain->inherits->searchchain'
read(spec, "inherits", spec.getTagName()),
read(spec, "excludes", "exclude"));
}
public ChainSpecification.Inheritance build() {
return inheritance;
}
private Set<ComponentSpecification> read(Element spec, String attributeName, String elementName) {
Set<ComponentSpecification> componentSpecifications = new LinkedHashSet<>();
componentSpecifications.addAll(spaceSeparatedComponentSpecificationsFromAttribute(spec, attributeName));
// TODO: the 'inherits' element is undocumented, and can be removed in an upcoming version of Vespa
componentSpecifications.addAll(idRefFromElements(XML.getChild(spec, "inherits"), elementName));
return componentSpecifications;
}
private Collection<ComponentSpecification> idRefFromElements(Element spec, String elementName) {
Collection<ComponentSpecification> result = new ArrayList<>();
if (spec == null)
return result;
for (Element element : XML.getChildren(spec, elementName)) {
result.add(XmlHelper.getIdRef(element));
}
return result;
}
private Collection<ComponentSpecification> spaceSeparatedComponentSpecificationsFromAttribute(Element spec, String attributeName) {
return toComponentSpecifications(XmlHelper.spaceSeparatedSymbolsFromAttribute(spec, attributeName));
}
private Set<ComponentSpecification> toComponentSpecifications(Collection<String> symbols) {
Set<ComponentSpecification> specifications = new LinkedHashSet<>();
for (String symbol : symbols) {
specifications.add(new ComponentSpecification(symbol));
}
return specifications;
}
}
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