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graphql.analysis.QueryReducer Maven / Gradle / Ivy

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package graphql.analysis;

import graphql.PublicApi;

/**
 * Used by {@link QueryTraverser} to reduce the fields of a Document (or part of it) to a single value.
 * 

* How this happens in detail (pre vs post-order for example) is defined by {@link QueryTraverser}. *

* See {@link QueryTraverser#reducePostOrder(QueryReducer, Object)} and {@link QueryTraverser#reducePreOrder(QueryReducer, Object)} */ @PublicApi @FunctionalInterface public interface QueryReducer { /** * Called each time a field is visited. * * @param fieldEnvironment the environment to this call * @param acc the previous result * * @return the new result */ T reduceField(QueryVisitorFieldEnvironment fieldEnvironment, T acc); }





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