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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.searchdefinition;
import com.yahoo.config.FileReference;
import com.yahoo.tensor.TensorType;
import com.yahoo.vespa.model.AbstractService;
import com.yahoo.vespa.model.utils.FileSender;
import java.util.Collection;
import java.util.Objects;
/**
* A global ranking constant distributed using file distribution.
* Ranking constants must be sent to some services to be useful - this is done
* by calling the sentTo method during the prepare phase of building models.
*
* @author arnej
* @author bratseth
*/
public class RankingConstant {
public enum PathType {FILE, URI};
/** The search definition-unique name of this constant */
private final String name;
private TensorType tensorType = null;
private String path = null;
private String fileReference = "";
public PathType getPathType() {
return pathType;
}
private PathType pathType = PathType.FILE;
public RankingConstant(String name) {
this.name = name;
}
public RankingConstant(String name, TensorType type, String fileName) {
this(name);
this.tensorType = type;
this.path = fileName;
validate();
}
public void setFileName(String fileName) {
Objects.requireNonNull(fileName, "Filename cannot be null");
this.path = fileName;
this.pathType = PathType.FILE;
}
public void setUri(String uri) {
Objects.requireNonNull(uri, "uri cannot be null");
this.path = uri;
this.pathType = PathType.URI;
}
public void setType(TensorType tensorType) { this.tensorType = tensorType; }
/** Initiate sending of this constant to some services over file distribution */
public void sendTo(Collection<? extends AbstractService> services) {
FileReference reference = (pathType == RankingConstant.PathType.FILE)
? FileSender.sendFileToServices(path, services)
: FileSender.sendUriToServices(path, services);
this.fileReference = reference.value();
}
public String getName() { return name; }
public String getFileName() { return path; }
public String getUri() { return path; }
public String getFileReference() { return fileReference; }
public TensorType getTensorType() { return tensorType; }
public String getType() { return tensorType.toString(); }
public void validate() {
if (path == null || path.isEmpty())
throw new IllegalArgumentException("Ranking constants must have a file or uri.");
if (tensorType == null)
throw new IllegalArgumentException("Ranking constant '" + name + "' must have a type.");
}
public String toString() {
StringBuilder b = new StringBuilder();
b.append("constant '").append(name)
.append(pathType == PathType.FILE ? "' from file '" : " from uri ").append(path)
.append("' with ref '").append(fileReference)
.append("' of type '").append(tensorType)
.append("'");
return b.toString();
}
}
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