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package io.molr.commons.domain;

import java.util.Objects;

import static java.util.Objects.requireNonNull;

public final class Placeholder {

    private final Class type;
    private final String name;

    private Placeholder(Class type, String name) {
        this.type = requireNonNull(type, "type must not be null");
        this.name = requireNonNull(name, "name must not be null");
    }

    public static final Placeholder aDouble(String name) {
        return new Placeholder<>(Double.class, name);
    }

    public static final Placeholder aBoolean(String name) {
        return new Placeholder<>(Boolean.class, name);
    }

    /* aLong does not work at the moment ... the transport over json always converts into integers
    when numbers fit into integers and then the case fails .. so for the moment we avoid it ;-)*/

    public static final Placeholder anInteger(String name) {
        return new Placeholder<>(Integer.class, name);
    }

    public static final Placeholder aString(String name) {
        return new Placeholder<>(String.class, name);
    }

    public Class type() {
        return this.type;
    }

    public String name() {
        return this.name;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Placeholder that = (Placeholder) o;
        return Objects.equals(type, that.type) &&
                Objects.equals(name, that.name);
    }

    @Override
    public int hashCode() {
        return Objects.hash(type, name);
    }

    @Override
    public String toString() {
        return "Placeholder{" +
                "type=" + type +
                ", name='" + name + '\'' +
                '}';
    }
}