com.alibaba.qlexpress4.runtime.instruction.NewArrayInstruction Maven / Gradle / Ivy

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package com.alibaba.qlexpress4.runtime.instruction;

import com.alibaba.qlexpress4.QLOptions;
import com.alibaba.qlexpress4.exception.ErrorReporter;
import com.alibaba.qlexpress4.exception.QLErrorCodes;
import com.alibaba.qlexpress4.runtime.Parameters;
import com.alibaba.qlexpress4.runtime.QContext;
import com.alibaba.qlexpress4.runtime.QResult;
import com.alibaba.qlexpress4.runtime.data.DataValue;
import com.alibaba.qlexpress4.runtime.data.convert.ObjTypeConvertor;
import com.alibaba.qlexpress4.utils.PrintlnUtils;

import java.lang.reflect.Array;
import java.util.function.Consumer;

/**
 * new int[] {1,2,3}
 * Operation: new array with init items
 * Input: ${length}
 * Output: 1
 * Author: DQinYuan
 */
public class NewArrayInstruction extends QLInstruction {

    private final Class clz;

    private final int length;

    public NewArrayInstruction(ErrorReporter errorReporter, Class clz, int length) {
        super(errorReporter);
        this.clz = clz;
        this.length = length;
    }

    @Override
    public QResult execute(QContext qContext, QLOptions qlOptions) {
        if (!qlOptions.checkArrLen(length)) {
            throw errorReporter.reportFormat(QLErrorCodes.EXCEED_MAX_ARR_LENGTH.name(),
                    QLErrorCodes.EXCEED_MAX_ARR_LENGTH.getErrorMsg(), length, qlOptions.getMaxArrLength());
        }
        Object array = Array.newInstance(clz, length);
        Parameters initItems = qContext.pop(length);
        for (int i = 0; i < initItems.size(); i++) {
            Object initItemObj = initItems.get(i).get();
            ObjTypeConvertor.QConverted qlConvertResult = ObjTypeConvertor.cast(initItemObj, clz);
            if (!qlConvertResult.isConvertible()) {
                throw errorReporter.reportFormat(QLErrorCodes.INCOMPATIBLE_ARRAY_ITEM_TYPE.name(),
                        QLErrorCodes.INCOMPATIBLE_ARRAY_ITEM_TYPE.getErrorMsg(), i,
                        initItemObj == null? "null": initItemObj.getClass().getName(), clz.getName());
            }
            Array.set(array, i, qlConvertResult.getConverted());
        }
        qContext.push(new DataValue(array));
        return QResult.NEXT_INSTRUCTION;
    }

    public Class getClz() {
        return clz;
    }

    @Override
    public int stackInput() {
        return length;
    }

    @Override
    public int stackOutput() {
        return 1;
    }

    @Override
    public void println(int index, int depth, Consumer debug) {
        PrintlnUtils.printlnByCurDepth(depth, index + ": NewArray with length " + length, debug);
    }
}