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    • io.polyglotted.elastic.search.Expression Maven / Gradle / Ivy

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    package io.polyglotted.elastic.search;

import io.polyglotted.common.model.MapResult.ImmutableResult;
import lombok.RequiredArgsConstructor;

import java.util.List;
import java.util.Objects;

import static io.polyglotted.common.model.MapResult.immutableResult;
import static io.polyglotted.common.util.BaseSerializer.serialize;
import static io.polyglotted.common.util.ListBuilder.immutableList;
import static io.polyglotted.common.util.StrUtil.nullOrEmpty;
import static java.util.Objects.requireNonNull;

@RequiredArgsConstructor
public final class Expression {
    static final Expression NilExpression = new Expression("_nil_", "_nil_", immutableResult());
    static final String ValueKey = "_val";
    public final String operation;
    public final String label;
    public final ImmutableResult args;

    static Expression withMap(String operation, String label, ImmutableResult args) {
        return new Expression(requireNonNull(operation), requireNonNull(label), args);
    }

    static Expression withValue(String expressionType, String label, Object valueArg) {
        return new Expression(expressionType, requireNonNull(label), immutableResult(ValueKey, valueArg));
    }

    static > Expression withArray(String expressionType, String label, List valueArg) {
        return new Expression(expressionType, requireNonNull(label), immutableResult(ValueKey, valueArg));
    }

    static Expression withLabel(String expressionType, String label) {
        return new Expression(expressionType, requireNonNull(label), immutableResult());
    }

     T valueArg() { return argFor(ValueKey, null); }

    List arrayArg() { return argFor(ValueKey, immutableList()); }

    String stringArg(String key) { return argFor(key, null); }

     T argFor(String key) { return requireNonNull(argFor(key, null)); }

    @SuppressWarnings("unchecked") private  T argFor(String key, T defValue) { return args.containsKey(key) ? (T) args.get(key) : defValue; }

    @Override public boolean equals(Object o) { return this == o || o != null && getClass() == o.getClass() && serialize(this).equals(serialize(o)); }

    @Override public int hashCode() { return Objects.hash(operation, label, args); }

    @Override public String toString() { return (nullOrEmpty(label) ? "" : label + " ") + operation + (args.isEmpty() ? "" : " " + args); }
}    
    
    
    

    




    
    
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