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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.prelude.fastsearch;
import com.yahoo.data.access.Inspector;
import com.yahoo.search.schema.DocumentSummary;
import java.util.Map;
import java.util.stream.Collectors;
/**
* A docsum definition which knows how to decode a certain class of document
* summaries. The docsum definition has a name and a list of field definitions
*
* @author bratseth
* @author Bjørn Borud
*/
public class DocsumDefinition {
private final String name;
private final Map<String, DocsumField> fields;
/** True if this contains dynamic fields */
private final boolean dynamic;
public DocsumDefinition(DocumentSummary documentSummary) {
this.name = documentSummary.name();
this.dynamic = documentSummary.isDynamic();
this.fields = documentSummary.fields().values()
.stream()
.map(field -> DocsumField.create(field.name(), field.type().asString()))
.collect(Collectors.toUnmodifiableMap(field -> field.getName(),
field -> field));
}
public String name() { return name; }
public Map<String, DocsumField> fields() { return fields; }
/** Returns whether this summary contains one or more dynamic fields */
public boolean isDynamic() { return dynamic; }
/**
* Returns the given slime value as the type specified in this, or null if the type is not known.
* Even in a correctly configured system we may encounter field names for which we do not know the type,
* in the time period when a configuration is changing and one node has received the new configuration and
* another has not.
*/
public Object convert(String fieldName, Inspector value) {
DocsumField field = fields.get(fieldName);
if (field == null || ! value.valid()) return null;
return field.convert(value);
}
@Override
public String toString() {
return "docsum definition '" + name() + "'";
}
}
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