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With inspiration from other libraries

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package io.virtdata.api.composers;

import io.virtdata.api.FunctionType;
import io.virtdata.api.ValueType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.function.*;

public class ComposerForLongFunction implements FunctionComposer> {
    private final static Logger logger = LoggerFactory.getLogger(ComposerForLongFunction.class);

    private final LongFunction inner;

    public ComposerForLongFunction(LongFunction inner) {
        this.inner = inner;
    }

    @Override
    public Object getFunctionObject() {
        return inner;
    }

    @Override
    @SuppressWarnings("unchecked")
    public FunctionComposer andThen(Object outer) {
        FunctionType functionType = FunctionType.valueOf(outer);
        Object outv = this.inner.apply(1L);
        ValueType itype = ValueType.valueOfAssignableClass(outv.getClass());
        switch (functionType) {

            case long_long:
                switch (itype) {
                    case LONG:
                        final LongUnaryOperator f11 =
                                (long l) -> ((LongUnaryOperator) outer).applyAsLong(((LongFunction) inner).apply(l));
                        return new ComposerForLongUnaryOperator(f11);
                    case DOUBLE:
                        final LongUnaryOperator f12 =
                                (long l) -> ((LongUnaryOperator) outer).applyAsLong(((LongFunction) inner).apply(l).longValue());
                        return new ComposerForLongUnaryOperator(f12);
                    case INT:
                        final LongUnaryOperator f13 =
                                (long l) -> ((LongUnaryOperator) outer).applyAsLong(((LongFunction) inner).apply(l));
                        return new ComposerForLongUnaryOperator(f13);
                    default:
                        final LongUnaryOperator f14 =
                                (long l) -> ((LongUnaryOperator) outer).applyAsLong(Double.valueOf(((LongFunction) inner).apply(l).toString()).longValue());
                        return new ComposerForLongUnaryOperator(f14);
                }
            case long_T:
                switch (itype) {
                    case LONG:
                        final LongFunction f21 =
                                (long l) -> ((LongFunction) outer).apply(((LongFunction) inner).apply(l));
                        return new ComposerForLongFunction(f21);
                    case DOUBLE:
                        final LongFunction f22 =
                                (long l) -> ((LongFunction) outer).apply(((LongFunction) inner).apply(l).longValue());
                        return new ComposerForLongFunction(f22);
                    case INT:
                        final LongFunction f23 =
                                (long l) -> ((LongFunction) outer).apply(((LongFunction) inner).apply(l));
                        return new ComposerForLongFunction(f23);
                    default:
                        final LongFunction f24 =
                                (long l) -> ((LongFunction) outer).apply(Double.valueOf(((LongFunction) inner).apply(l).toString()).longValue());
                        return new ComposerForLongFunction(f24);
                }
            case long_int:
                switch (itype) {
                    case LONG:
                        final LongToIntFunction f31 =
                                (long l) -> ((LongToIntFunction) outer).applyAsInt(((LongFunction) inner).apply(l));
                        return new ComposerForLongToIntFunction(f31);
                    case DOUBLE:
                        final LongToIntFunction f32 =
                                (long l) -> ((LongToIntFunction) outer).applyAsInt(((LongFunction) inner).apply(l).longValue());
                        return new ComposerForLongToIntFunction(f32);
                    case INT:
                        final LongToIntFunction f33 =
                                (long l) -> ((LongToIntFunction) outer).applyAsInt(((LongFunction) inner).apply(l));
                        return new ComposerForLongToIntFunction(f33);
                    default:
                        final LongToIntFunction f34 =
                                (long l) -> ((LongToIntFunction) outer).applyAsInt(Double.valueOf(((LongFunction) inner).apply(l).toString()).longValue());
                        return new ComposerForLongToIntFunction(f34);
                }
            case long_double:
                switch (itype) {
                    case LONG:
                        final LongToDoubleFunction f41 =
                                (long l) -> ((LongToDoubleFunction) outer).applyAsDouble(((LongFunction) inner).apply(l));
                        return new ComposerForLongToDoubleFunction(f41);
                    case DOUBLE:
                        final LongToDoubleFunction f42 =
                                (long l) -> ((LongToDoubleFunction) outer).applyAsDouble(((LongFunction) inner).apply(l).longValue());
                        return new ComposerForLongToDoubleFunction(f42);
                    case INT:
                        final LongToDoubleFunction f43 =
                                (long l) -> ((LongToDoubleFunction) outer).applyAsDouble(((LongFunction) inner).apply(l));
                        return new ComposerForLongToDoubleFunction(f43);
                    default:
                        final LongToDoubleFunction f44 =
                                (long l) -> ((LongToDoubleFunction) outer).applyAsDouble(Double.valueOf(((LongFunction) inner).apply(l).toString()).longValue());
                        return new ComposerForLongToDoubleFunction(f44);
                }
            case R_T:
                final LongFunction f5 =
                        (long l) -> ((Function) outer).apply(((LongFunction) inner).apply(l));
                return new ComposerForLongFunction(f5);
            case int_int:
                switch (itype) {
                    case LONG:
                        final LongToIntFunction f61 = (long l) ->
                                ((IntUnaryOperator) outer).applyAsInt(((LongFunction) inner).apply(l).intValue());
                        return new ComposerForLongToIntFunction(f61);
                    case INT:
                        final LongToIntFunction f62 = (long l) ->
                                ((IntUnaryOperator) outer).applyAsInt(((LongFunction) inner).apply(l));
                        return new ComposerForLongToIntFunction(f62);
                    case DOUBLE:
                        final LongToIntFunction f64 = (long l) ->
                                ((IntUnaryOperator) outer).applyAsInt(((LongFunction) inner).apply(l).intValue());
                        return new ComposerForLongToIntFunction(f64);
                    default:
                        final LongToIntFunction f63 = (long l) ->
                                ((IntUnaryOperator) outer).applyAsInt(Double.valueOf(((LongFunction) inner).apply(l).toString()).intValue());
                        return new ComposerForLongToIntFunction(f63);
                }
            case int_long:
                switch (itype) {
                    case LONG:
                        final LongUnaryOperator f71 = (long l) ->
                                ((IntToLongFunction) outer).applyAsLong(((LongFunction) inner).apply(l).intValue());
                        return new ComposerForLongUnaryOperator(f71);
                    case INT:
                        final LongUnaryOperator f72 = (long l) ->
                                ((IntToLongFunction) outer).applyAsLong(((LongFunction) inner).apply(l));
                        return new ComposerForLongUnaryOperator(f72);
                    case DOUBLE:
                        final LongUnaryOperator f73 = (long l) ->
                                ((IntToLongFunction) outer).applyAsLong(((LongFunction) inner).apply(l).intValue());
                        return new ComposerForLongUnaryOperator(f73);
                    default:
                        final LongUnaryOperator f74 = (long l) ->
                                ((IntToLongFunction) outer).applyAsLong(Double.valueOf(((LongFunction) inner).apply(l).toString()).intValue());
                        return new ComposerForLongUnaryOperator(f74);
                }
            case int_double:
                switch (itype) {
                    case LONG:
                        final LongToDoubleFunction f81 =
                                (long l) -> ((IntToDoubleFunction) outer).applyAsDouble(((LongFunction) inner).apply(l).intValue());
                        return new ComposerForLongToDoubleFunction(f81);
                    case DOUBLE:
                        final LongToDoubleFunction f83 =
                                (long l) -> ((IntToDoubleFunction) outer).applyAsDouble(((LongFunction) inner).apply(l).intValue());
                        return new ComposerForLongToDoubleFunction(f83);
                    case INT:
                        final LongToDoubleFunction f82 =
                                (long l) -> ((IntToDoubleFunction) outer).applyAsDouble(((LongFunction) inner).apply(l));
                        return new ComposerForLongToDoubleFunction(f82);
                    default:
                        final LongToDoubleFunction f84 =
                                (long l) -> ((IntToDoubleFunction) outer).applyAsDouble(Double.valueOf(((LongFunction) inner).apply(l).toString()).intValue());
                        return new ComposerForLongToDoubleFunction(f84);
                }
            case int_T:
                switch (itype) {
                    case LONG:
                        final LongFunction f91 =
                                (long l) -> ((IntFunction) outer).apply(((LongFunction) inner).apply(l).intValue());
                        return new ComposerForLongFunction(f91);
                    case DOUBLE:
                        final LongFunction f92 =
                                (long l) -> ((IntFunction) outer).apply(((LongFunction) inner).apply(l).intValue());
                        return new ComposerForLongFunction(f92);
                    case INT:
                        final LongFunction f93 =
                                (long l) -> ((IntFunction) outer).apply(((LongFunction) inner).apply(l));
                        return new ComposerForLongFunction(f93);
                    default:
                        final LongFunction f94 =
                                (long l) -> ((IntFunction) outer).apply(Double.valueOf(((LongFunction) inner).apply(l).toString()).intValue());
                        return new ComposerForLongFunction(f94);
                }
            case double_double:
                switch (itype) {
                    case LONG:
                        final LongToDoubleFunction f101 =
                                (long l) -> ((DoubleUnaryOperator) outer).applyAsDouble(((LongFunction) inner).apply(l));
                        return new ComposerForLongToDoubleFunction(f101);
                    case DOUBLE:
                        final LongToDoubleFunction f102 =
                                (long l) -> ((DoubleUnaryOperator) outer).applyAsDouble(((LongFunction) inner).apply(l));
                        return new ComposerForLongToDoubleFunction(f102);
                    case INT:
                        final LongToDoubleFunction f103 =
                                (long l) -> ((DoubleUnaryOperator) outer).applyAsDouble(((LongFunction) inner).apply(l));
                        return new ComposerForLongToDoubleFunction(f103);
                    default:
                        final LongToDoubleFunction f104 =
                                (long l) -> ((DoubleUnaryOperator) outer).applyAsDouble(Double.valueOf(((LongFunction) inner).apply(l).toString()));
                        return new ComposerForLongToDoubleFunction(f104);
                }
            case double_long:
                switch (itype) {
                    case LONG:
                        final LongUnaryOperator f111 =
                                (long l) -> ((DoubleToLongFunction) outer).applyAsLong(((LongFunction) inner).apply(l));
                        return new ComposerForLongUnaryOperator(f111);
                    case INT:
                        final LongUnaryOperator f112 =
                                (long l) -> ((DoubleToLongFunction) outer).applyAsLong(((LongFunction) inner).apply(l));
                        return new ComposerForLongUnaryOperator(f112);
                    case DOUBLE:
                        final LongUnaryOperator f113 =
                                (long l) -> ((DoubleToLongFunction) outer).applyAsLong(((LongFunction) inner).apply(l));
                        return new ComposerForLongUnaryOperator(f113);
                    default:
                        final LongUnaryOperator f114 =
                                (long l) -> ((DoubleToLongFunction) outer).applyAsLong(Double.valueOf(((LongFunction) inner).apply(l).toString()));
                        return new ComposerForLongUnaryOperator(f114);
                }
            case double_int:
                switch (itype) {
                    case LONG:
                        final LongToIntFunction f121 =
                                (long l) -> ((DoubleToIntFunction) outer).applyAsInt(((LongFunction) inner).apply(l));
                        return new ComposerForLongToIntFunction(f121);
                    case INT:
                        final LongToIntFunction f122 =
                                (long l) -> ((DoubleToIntFunction) outer).applyAsInt(((LongFunction) inner).apply(l));
                        return new ComposerForLongToIntFunction(f122);
                    case DOUBLE:
                        final LongToIntFunction f123 =
                                (long l) -> ((DoubleToIntFunction) outer).applyAsInt(((LongFunction) inner).apply(l));
                        return new ComposerForLongToIntFunction(f123);
                    default:
                        final LongToIntFunction f124 =
                                (long l) -> ((DoubleToIntFunction) outer).applyAsInt(Double.valueOf(((LongFunction) inner).apply(l).toString()));
                        return new ComposerForLongToIntFunction(f124);
                }

            case double_T:
                switch (itype) {
                    case LONG:
                        final LongFunction f131 =
                                (long l) -> ((DoubleFunction) outer).apply(((LongFunction) inner).apply(l));
                        return new ComposerForLongFunction(f131);
                    case DOUBLE:
                        final LongFunction f133 =
                                (long l) -> ((DoubleFunction) outer).apply(((LongFunction) inner).apply(l));
                        return new ComposerForLongFunction(f133);
                    case INT:
                        final LongFunction f132 =
                                (long l) -> ((DoubleFunction) outer).apply(((LongFunction) inner).apply(l));
                        return new ComposerForLongFunction(f132);
                    default:
                        final LongFunction f134 =
                                (long l) -> ((DoubleFunction) outer).apply(Double.valueOf(((LongFunction) inner).apply(l).toString()));
                        return new ComposerForLongFunction(f134);
                }
            default:
                throw new RuntimeException(functionType + " is not recognized");

        }
    }
}
 















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