source: java/main/src/main/java/com/framsticks/params/types/UniqueListParam.java @ 77

package com.framsticks.params.types;

import com.framsticks.params.AccessInterface;
import com.framsticks.params.CastFailure;
import com.framsticks.params.UniqueListAccess;
import com.framsticks.util.Numbers;

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

/**
 * @author Piotr Sniegowski
 */
public class UniqueListParam extends ListParam {

    final String uidName;

    public UniqueListParam(String containedTypeName, String uidName) {
        super(containedTypeName);
        this.uidName = uidName;
    }

    @Override
    public String computeAccessId() {
        return "l " + containedTypeName + " " + uidName;
    }


    @Override
    public Class getStorageType() {
        return Map.class;
    }

    @Override
    public AccessInterface prepareAccessInterface(AccessInterface access) {
        return new UniqueListAccess(access, uidName);
    }


    @Override
    public Object reassign(Object newValue, Object oldValue) throws CastFailure {
        if (newValue instanceof Map) {
            return newValue;
        }
        Integer size = Numbers.cast(newValue, Integer.class);
        if (size != null) {
            //return oldValue;
            /*
            the integer value should be ignored, because this may cause, that object is created before
            information about it's elements is available, which would break resolution flow
            */
            if (oldValue != null) {
                return oldValue;
            }
            return new HashMap();
        }

        throw new CastFailure();
    }

    @Override
    public String getType() {
        return "l " + containedTypeName + " " + uidName;
    }


}