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package org.solovyev.common.text;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.solovyev.common.collections.CollectionsUtils;
import org.solovyev.common.collections.LoopData;

import java.util.ArrayList;
import java.util.List;

/**
 * User: serso
 * Date: 8/7/12
 * Time: 8:24 PM
 */
public class CollectionTransformations {

    /**
     * @param string	- string where stored list of objects separated by delimiter
     * @param delimiter - delimiter with which string will be split
     * @param parser	- object that will create objects of specified type
     * @param        - type of object
     * @return list of objects, not null
     */
    @NotNull
    public static  List split(@Nullable String string, @NotNull String delimiter, @NotNull Parser parser) {
        final List result = new ArrayList();

        if (!StringUtils.isEmpty(string)) {
            @SuppressWarnings({"ConstantConditions"}) final String[] parts = string.split(delimiter);

            if (!CollectionsUtils.isEmpty(parts)) {
                for (String part : parts) {
                    result.add(parser.parseValue(part));
                }
            }
        }

        return result;
    }

    /**
     * @param string	- string where stored list of objects separated by delimiter
     * @param delimiter - delimiter with which string will be split
     * @return list of objects, not null
     */
    @NotNull
    public static List split(@Nullable String string, @NotNull String delimiter) {
        return split(string, delimiter, new StringMapper());
    }

    @Nullable
    public static  String formatValue(@Nullable List values, @NotNull String delimiter, @NotNull org.solovyev.common.text.Formatter formatter) {
        String result = null;
        if (!CollectionsUtils.isEmpty(values)) {
            final StringBuilder sb = new StringBuilder();

            final LoopData ld = new LoopData(values);
            for (T value : values) {
                sb.append(formatter.formatValue(value));
                if (!ld.isLastAndNext()) {
                    sb.append(delimiter);
                }
            }

            result = sb.toString();
        }

        return result;
    }
}