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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.search.searchchain;
/**
* Helper class for ordering searchers. Searchers may use these names in their
* {@literal @}Before and {@literal @}After annotations, though in general
* a searcher should depend on some explicit functionality, not these
* checkpoints.
*
* @author Steinar Knutsen
*/
public final class PhaseNames {
private PhaseNames() {
}
/**
* A checkpoint where the query is not yet transformed in any way. RAW_QUERY
* is the first checkpoint not provided by some searcher.
*/
public static final String RAW_QUERY = "rawQuery";
/**
* A checkpoint where as many query transformers as practically possible has
* been run. TRANSFORMED_QUERY is the first checkpoint after RAW_QUERY.
*/
public static final String TRANSFORMED_QUERY = "transformedQuery";
/**
* A checkpoint where results from different backends have been flattened
* into a single result. BLENDED_RESULT is the first checkpoint after
* TRANSFORMED_QUERY.
*/
public static final String BLENDED_RESULT = "blendedResult";
/**
* A checkpoint where data from different backends are not yet merged.
* UNBLENDED_RESULT is the first checkpoint after BLENDED_RESULT.
*/
public static final String UNBLENDED_RESULT = "unblendedResult";
/**
* The last checkpoint in a search chain not provided by any searcher.
*/
public static final String BACKEND = "backend";
}
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