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    • graphql.validation.util.Util Maven / Gradle / Ivy

    package graphql.validation.util;

import graphql.Assert;
import graphql.GraphQLError;
import graphql.Internal;
import graphql.execution.DataFetcherResult;
import graphql.execution.ExecutionPath;
import graphql.schema.GraphQLInputType;
import graphql.schema.GraphQLType;
import graphql.schema.GraphQLTypeUtil;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletionStage;
import java.util.function.Function;

@Internal
public class Util {

    /**
     * This will unwrap one level of List ness and ALL levels of NonNull ness.
     *
     * @param inputType the type to unwrap
     *
     * @return an input type
     */
    public static GraphQLInputType unwrapOneAndAllNonNull(GraphQLInputType inputType) {
        GraphQLType type = GraphQLTypeUtil.unwrapNonNull(inputType);
        type = GraphQLTypeUtil.unwrapOne(type); // one level
        type = GraphQLTypeUtil.unwrapNonNull(type);
        if (type instanceof GraphQLInputType) {
            return (GraphQLInputType) type;
        } else {
            String argType = GraphQLTypeUtil.simplePrint(inputType);
            return Assert.assertShouldNeverHappen("You have a wrapped type that is in fact not a input type : %s", argType);
        }
    }

    public static GraphQLInputType unwrapNonNull(GraphQLInputType inputType) {
        GraphQLType type = GraphQLTypeUtil.unwrapNonNull(inputType);
        if (type instanceof GraphQLInputType) {
            return (GraphQLInputType) type;
        } else {
            String argType = GraphQLTypeUtil.simplePrint(inputType);
            return Assert.assertShouldNeverHappen("You have a wrapped type that is in fact not a input type : %s", argType);
        }
    }

    public static Object mkDFRFromFetchedResult(List errors, Object value) {
        if (value instanceof CompletionStage) {
            return ((CompletionStage) value).thenApply(v -> mkDFRFromFetchedResult(errors, v));
        } else if (value instanceof DataFetcherResult) {
            DataFetcherResult df = (DataFetcherResult) value;
            return mkDFR(df.getData(), concat(errors, df.getErrors()), df.getLocalContext());
        } else {
            return mkDFR(value, errors, null);
        }
    }

    public static DataFetcherResult mkDFR(Object value, List errors, Object localContext) {
        return DataFetcherResult.newResult().data(value).errors(errors).localContext(localContext).build();
    }

    public static  List concat(List l1, List l2) {
        List errors = new ArrayList<>();
        errors.addAll(l1);
        errors.addAll(l2);
        return errors;
    }

    public static > List sort(Collection toBeSorted, Function keyExtractor) {
        ArrayList l = new ArrayList<>(toBeSorted);
        l.sort(Comparator.comparing(keyExtractor));
        return l;
    }


    public static ExecutionPath concatPaths(ExecutionPath parent, ExecutionPath child) {
        if (child == null) {
            return parent;
        }
        List segments = child.toList();
        for (Object segment : segments) {
            if (segment instanceof Integer) {
                parent = parent.segment(((Integer) segment));
            } else {
                parent = parent.segment((String.valueOf(segment)));
            }
        }
        return parent;
    }


    /**
     * Makes a map of the args
     *
     * @param args must be an key / value array with String keys as the even params and values as then odd params
     *
     * @return a map of the args
     */
    public static Map mkMap(Object... args) {
        Map params = new LinkedHashMap<>();
        Assert.assertTrue(args.length % 2 == 0, "You MUST pass in an even number of arguments");
        for (int ix = 0; ix < args.length; ix = ix + 2) {
            Object key = args[ix];
            Assert.assertTrue(key instanceof String, "You MUST pass in a message param string key");
            Object val = args[ix + 1];
            params.put(String.valueOf(key), val);
        }
        return params;
    }

}
    
    
    
    

    




    
    
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