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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.docproc;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
import com.yahoo.document.Document;
import com.yahoo.document.DocumentId;
import com.yahoo.document.annotation.Annotation;
import com.yahoo.document.datatypes.Struct;
import com.yahoo.document.datatypes.StructuredFieldValue;
import com.yahoo.yolean.Exceptions;
/**
* 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 com.yahoo.document.Document getDocumentCopy(java.lang.String type, com.yahoo.document.datatypes.StructuredFieldValue src, com.yahoo.document.DocumentId id) {
// Note: This method can't be abstract because it must work with older bundles where the ConcreteDocumentFactory may not implement it.
// It is overridden to not use reflection by newer bundles.
// The implementation here is not so good in bundles, since it instantiates the doc using reflection.
// TODO: for 6.0: make this method abstract and throw away the code below.
Class<? extends Document> concreteClass = documentTypes().get(type);
try {
Constructor<? extends Document> copyCon = concreteClass.getConstructor(StructuredFieldValue.class, DocumentId.class);
return copyCon.newInstance(src, id);
} catch (InvocationTargetException | NoSuchMethodException | InstantiationException | IllegalAccessException e) {
throw new RuntimeException(Exceptions.toMessageString(e), e);
}
}
}
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