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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.docproc;
import java.util.Map;
import com.yahoo.document.DataType;
import com.yahoo.document.Document;
import com.yahoo.document.DocumentId;
import com.yahoo.document.Field;
import com.yahoo.document.annotation.Annotation;
import com.yahoo.document.datatypes.Array;
import com.yahoo.document.datatypes.FieldValue;
import com.yahoo.document.datatypes.MapFieldValue;
import com.yahoo.document.datatypes.Struct;
import com.yahoo.document.datatypes.StructuredFieldValue;
/**
* Subtyped by factory classes for concrete document types. The factory classes are auto-generated
* by vespa-documentgen-plugin. This superclass is used to manage the factories in OSGI.
*
* @author vegardh
*/
public abstract class AbstractConcreteDocumentFactory extends com.yahoo.component.AbstractComponent {
public abstract Map<String, Class<? extends Document>> documentTypes();
public abstract Map<String, Class<? extends Struct>> structTypes();
public abstract Map<String, Class<? extends Annotation>> annotationTypes();
/**
* Used by the docproc framework to get an instance of a concrete document type without resorting to reflection in a bundle
*
* @return a concrete document instance
*/
public abstract Document getDocumentCopy(java.lang.String type, StructuredFieldValue src, DocumentId id);
/**
* If the FieldValue is a StructuredFieldValue it will upgrade to the concrete type
* @param field to upgrade
* @param fv value to upgrade
* @return fv or upgraded fv
*/
public FieldValue optionallyUpgrade(Field field, FieldValue fv) {
return optionallyUpgrade(field.getDataType(), fv);
}
@SuppressWarnings({"unchecked"})
private FieldValue optionallyUpgrade(DataType dataType, FieldValue fv) {
if (fv instanceof StructuredFieldValue) {
try {
return structTypes().get(dataType.getName())
.getConstructor(StructuredFieldValue.class)
.newInstance(fv);
} catch (java.lang.Exception ex) {
throw new RuntimeException(ex);
}
} else if (fv instanceof Array) {
Array<FieldValue> array = (Array<FieldValue>) fv;
DataType nestedType = array.getDataType().getNestedType();
if (nestedType.getPrimitiveType() == null) {
array.replaceAll((item) -> optionallyUpgrade(nestedType, item));
}
} else if (fv instanceof MapFieldValue) {
MapFieldValue<FieldValue, FieldValue> map = (MapFieldValue<FieldValue, FieldValue>) fv;
DataType valueTypeType = map.getDataType().getValueType();
if (valueTypeType.getPrimitiveType() == null) {
map.replaceAll((key, value) -> optionallyUpgrade(valueTypeType, value));
}
}
return fv;
}
}
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