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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.vespa.config.protocol;
import com.yahoo.slime.ArrayTraverser;
import com.yahoo.slime.Inspector;
import com.yahoo.yolean.trace.TraceNode;
/**
* Deserializing from a {@link Inspector} (slime) representation to a {@link TraceNode}
*
* @author Ulf Lilleengen
*/
public class SlimeTraceDeserializer {
private final Inspector entry;
public SlimeTraceDeserializer(Inspector inspector) {
this.entry = inspector;
}
public TraceNode deserialize() {
return deserialize(entry);
}
private static TraceNode deserialize(Inspector entry) {
Object payload = decodePayload(entry.field(SlimeTraceSerializer.PAYLOAD));
long timestamp = decodeTimestamp(entry.field(SlimeTraceSerializer.TIMESTAMP));
final TraceNode node = new TraceNode(payload, timestamp);
Inspector children = entry.field(SlimeTraceSerializer.CHILDREN);
children.traverse(new ArrayTraverser() {
@Override
public void entry(int idx, Inspector inspector) {
node.add(deserialize(inspector));
}
});
return node;
}
private static long decodeTimestamp(Inspector entry) {
return entry.asLong();
}
private static Object decodePayload(Inspector entry) {
return switch (entry.type()) {
case STRING -> entry.asString();
case LONG -> entry.asLong();
case BOOL -> entry.asBool();
case DOUBLE -> entry.asDouble();
case DATA -> entry.asData();
default -> null;
};
}
}
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