com.javonet.core.handler.ArraySetItemHandler Maven / Gradle / Ivy

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package com.javonet.core.handler;

import com.javonet.utils.Command;

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

public class ArraySetItemHandler extends AbstractHandler {
    @Override
    Object process(Command command) throws Exception {
        if (command.getPayload()[0] instanceof Object[]) {
            return setArrayElement(command);
        } else if (command.getPayload()[0] instanceof List) {
            return setListElement(command);
        } else if (command.getPayload()[0] instanceof Map) {
            return setMapElement(command);
        } else if (command.getPayload()[0] instanceof Dictionary) {
            return setDictionaryElement(command);
        } else {
            throw new Exception(String.format("Cannot set element from %s", command.getPayload()[0]));
        }
    }

    private Object setArrayElement(Command command) throws Exception {
        Object array = command.getPayload()[0];
        Object[] indexes;
        if (command.getPayload()[1] instanceof Object[]) {
            indexes = (Object[]) command.getPayload()[1];
        } else {
            indexes = new Object[]{command.getPayload()[1]};
        }

        Object value = command.getPayload()[2];

        switch (indexes.length) {
            case 1:
                ((Object[]) array)[(Integer) indexes[0]] = value;
                break;
            case 2:
                ((Object[][]) array)[(Integer) indexes[0]][(Integer) indexes[1]] = value;
                break;
            case 3:
                ((Object[][][]) array)[(Integer) indexes[0]][(Integer) indexes[1]][(Integer) indexes[2]] = value;
                break;
            default:
                throw new Exception("ArrayGetItemHandler exception");
        }
        return 0;
    }

    private Object setListElement(Command command) {
        List list = (List) command.getPayload()[0];
        Integer index = (Integer) command.getPayload()[1];
        Object value = command.getPayload()[2];
        return list.set(index, value);
    }

    private Object setMapElement(Command command) {
        Map map = (Map) command.getPayload()[0];
        Object key = command.getPayload()[1];
        Object value = command.getPayload()[2];
        return map.put(key, value);
    }

    private Object setDictionaryElement(Command command) {
        Dictionary dict = (Dictionary) command.getPayload()[0];
        Object key = command.getPayload()[1];
        Object value = command.getPayload()[2];
        return dict.put(key, value);
    }


}