fun.langel.cql.resolve.RvResolver Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of cave-sql Show documentation

The newest version!

package fun.langel.cql.resolve;

import fun.langel.cql.node.Column;
import fun.langel.cql.node.Function;
import fun.langel.cql.rv.Number;
import fun.langel.cql.rv.ReturnValue;
import fun.langel.cql.rv.Row;

import java.util.List;
import java.util.Map;

/**
 * @author [email protected](GuHan)
 * @since 2022/4/26 17:16
 **/
public interface RvResolver {
    ReturnValue resolve(F from, List columns);

    default ReturnValue resolveObj(Object v) {
        if (v == null) {
            return null;
        }
        if (v instanceof String) {
            return fun.langel.cql.rv.String.of((String) v);
        }
        if (int.class.isAssignableFrom(v.getClass()) || (v instanceof Integer)) {
            return Number.of((Integer) v);
        }
        if (long.class.isAssignableFrom(v.getClass()) || (v instanceof Long)) {
            return Number.of((Long) v);
        }
        if (float.class.isAssignableFrom(v.getClass()) || (v instanceof Float)) {
            return Number.of((Float) v);
        }
        if (double.class.isAssignableFrom(v.getClass()) || (v instanceof Double)) {
            return Number.of((Double) v);
        }
        return fun.langel.cql.rv.String.of(String.valueOf(v));
    }

    default Row resolve(Map r) {
        Row row = new Row();
        for (Map.Entry entry : r.entrySet()) {
            final String key = entry.getKey();
            Object value = entry.getValue();
            row.put(key, resolveObj(value));
        }
        return row;
    }
}