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MetaObjects for Model-driven development - MetaData Libraries

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package com.draagon.meta.io.util;

import com.draagon.meta.MetaData;
import com.draagon.meta.MetaDataAware;
import com.draagon.meta.loader.MetaDataLoader;
import com.draagon.meta.object.MetaObject;
import com.draagon.meta.object.MetaObjectAware;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public class IOUtil {

    public static MetaObject getMetaObjectFor(MetaDataLoader loader, Object o) {
        if ( o instanceof MetaDataAware ) return (MetaObject) ((MetaDataAware) o).getMetaData();
        return loader.getMetaObjectFor( o );
    }

    public static String toCamelCase( String text, boolean capitalizeFirstChar ) {

        if (text == null || text.isEmpty()) {
            return text;
        }

        StringBuilder converted = new StringBuilder();

        boolean first = true;
        boolean convertNext = false;
        for (char ch : text.toCharArray()) {
            if (ch == '-') {
                convertNext = true;
            }
            else if (convertNext) {
                ch = Character.toTitleCase(ch);
                convertNext = false;
                converted.append(ch);
            }
            else if (first && capitalizeFirstChar) {
                ch = Character.toTitleCase(ch);
                converted.append(ch);
            }
            else {
                converted.append(ch);
            }
            if ( first ) first = false;
        }

        return converted.toString();
    }

    public static List getUniquePackages(Collection filtered ) throws IOException {
        List pkgs = new ArrayList<>();

        filtered.forEach( md -> {
            if ( md instanceof MetaObject
                    && !pkgs.contains( md.getPackage() )) {
                pkgs.add( md.getPackage() );
            }
        });

        return pkgs;
    }

    public static boolean isAbstract( MetaData md ) {
        if ( md.hasMetaAttr("_isAbstract")
                && Boolean.TRUE.equals( md.getMetaAttr( "_isAbstract" ).getValue())) {
            return true;
        }
        return false;
    }
}