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P15GEN2\59518

2024-05-29 d4210c7c4b04abde20037ea8aa0f54ef8a2649aa

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package foundation.object.reader;
 
import java.util.Collection;
import java.util.List;
 
import foundation.translator.ITranslator;
import foundation.translator.Translator;
import foundation.util.ContentBuilder;
 
public class CollectionReader extends EntityReader {
 
    protected IEntityReader valueReader;
    protected ITranslator translator;
    
    protected CollectionReader(Class<?> clazz) throws Exception {
        super(clazz);
    }
 
    @Override
    protected void initValueReader(Class<?> dataType) throws Exception {
        if (translator == null && valueReader == null) {
            if (Translator.containsType(dataType)) {
                translator = Translator.getInstance(dataType);
            }
            else {
                valueReader = EntityReader.getInstance(dataType);
            }
        }
    }
    
    @SuppressWarnings("unchecked")
    @Override
    public String getString(Object entity) {
        Collection<Object> collection = (Collection<Object>) entity;
        
        if (collection.isEmpty()) {
            return "[]";
        }
        
        ContentBuilder result = new ContentBuilder();
        result.append("[");
        
        try {
            initValueReader(collection.iterator().next().getClass());
        } catch (Exception e) {
            return e.getMessage();
        }
        
        for (Object value: collection) {
            try {
                if (translator != null) {
                    result.append(translator.toString(value), ", ");
                }
                else {
                    result.append(valueReader.getString(value), ", ");
                }
            }
            catch (Exception e) {
                result.append("error", ",");
            }
        }
        
        result.append("]");
        return result.toString();
    }
 
    @SuppressWarnings("unchecked")
    @Override
    public String getJSONString(Object entity) throws Exception {
        Collection<Object> collection = (Collection<Object>) entity;
        
        if (collection.isEmpty()) {
            return "[]";
        }
        
        ContentBuilder result = new ContentBuilder();
        result.append("[");
        
        try {
            Class<?> clazz = collection.iterator().next().getClass();
            initValueReader(clazz);
        } 
        catch (Exception e) {
            return e.getMessage();
        }
        
        for (Object value: collection) {
            try {
                if (translator != null) {
                    result.append(translator.toJSONString(value), ", ");
                }
                else {
                    result.append(valueReader.getJSONString(value), ", ");
                }
            }
            catch (Exception e) {
                result.append("error", ",");
            }
        }
        
        result.append("]");
        return result.toString();
    }
 
    @Override
    public String getJSONString(Object entity, String defaultValue) {
        try {
            return getJSONString(entity);
        }
        catch (Exception e) {
            return defaultValue;
        }
    }
 
    @Override
    public List<NameValuePair> getValueList(Object entity) throws Exception {
        return null;
    }
 
}