com.alibaba.qlexpress4.runtime.LeftValue Maven / Gradle / Ivy

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package com.alibaba.qlexpress4.runtime;

import com.alibaba.qlexpress4.exception.ErrorReporter;
import com.alibaba.qlexpress4.exception.QLErrorCodes;
import com.alibaba.qlexpress4.runtime.data.convert.ObjTypeConvertor;

/**
 * assignable value
 * 
 * Author: DQinYuan
 */
public interface LeftValue extends Value {

    Class getDefinedType();

    @Override
    default Class getType() {
        Class definedType = getDefinedType();
        return definedType == null? Value.super.getType(): definedType;
    }

    default void set(Object newValue, ErrorReporter errorReporter) {
        Class defineType = getDefinedType();
        ObjTypeConvertor.QConverted result = ObjTypeConvertor.cast(newValue, defineType);
        if (!result.isConvertible()) {
            throw errorReporter.reportFormat(QLErrorCodes.INCOMPATIBLE_ASSIGNMENT_TYPE.name(),
                    QLErrorCodes.INCOMPATIBLE_ASSIGNMENT_TYPE.getErrorMsg(),
                    newValue == null? "null": newValue.getClass().getName(), defineType.getName());
        }
        setInner(result.getConverted());
    }

    void setInner(Object newValue);

    /**
     * @return Nullable
     */
    String getSymbolName();
}