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    • prerna.util.gson.QueryCustomOrderByAdapter Maven / Gradle / Ivy

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    package prerna.util.gson;

import java.io.IOException;
import java.util.List;
import java.util.Vector;

import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;

import prerna.query.querystruct.selectors.IQuerySelector;
import prerna.query.querystruct.selectors.IQuerySort;
import prerna.query.querystruct.selectors.QueryColumnSelector;
import prerna.query.querystruct.selectors.QueryCustomOrderBy;

public class QueryCustomOrderByAdapter extends AbstractSemossTypeAdapter implements IQuerySortAdapterHelper {

	@Override 
	public QueryCustomOrderBy read(JsonReader in) throws IOException {
		if (in.peek() == JsonToken.NULL) {
			in.nextNull();
			return null;
		}

		// remove the beginning objects
		in.beginObject();
		in.nextName();
		in.nextString();
		in.nextName();
		
		// now we read the actual content
		QueryCustomOrderBy value = readContent(in);
		in.endObject();
		return value;
	}

	@Override
	public QueryCustomOrderBy readContent(JsonReader in) throws IOException {
		QueryCustomOrderBy value = new QueryCustomOrderBy();
		
		in.beginObject();
		while(in.hasNext()) {
			String key = in.nextName();
			if(key.equals("columnToSort")) {
				IQuerySelectorAdapter selectorAdapter = new IQuerySelectorAdapter();
				IQuerySelector selector = selectorAdapter.read(in);
				value.setColumnToSort((QueryColumnSelector) selector);
			} else if(key.equals("values")) {
				List customOrder = new Vector<>();
				in.beginArray();
				while(in.hasNext()) {
					JsonToken type = in.peek();
					if(type == JsonToken.NULL) {
						customOrder.add(null);
						in.nextNull();
					} else if(type == JsonToken.NUMBER) {
						// assume integer
						try {
							int obj = in.nextInt();
							customOrder.add(obj);
						} catch(Exception e) {
							// ignore
							double obj = in.nextDouble();
							customOrder.add(obj);
						}
					} else {
						// should be a string
						customOrder.add(in.nextString());
					}
				}
				in.endArray();
				value.setCustomOrder(customOrder);
			}
		}
		in.endObject();
		return value;
	}

	@Override 
	public void write(JsonWriter out, QueryCustomOrderBy value) throws IOException {
		if (value == null) {
			out.nullValue();
			return;
		}
		
		// always start with the type of the query selector
		out.beginObject();
		out.name("type").value(IQuerySort.QUERY_SORT_TYPE.CUSTOM.toString());
		out.name("content");
		// content object
		out.beginObject();
		out.name("columnToSort");
		// generic selector output
		IQuerySelector s = value.getColumnToSort();
		TypeAdapter adapter = IQuerySelector.getAdapterForSelector(s.getSelectorType());
		adapter.write(out, s);
		out.name("values");
		List customOrder = value.getCustomOrder();
		out.beginArray();
		for(Object obj : customOrder) {
			if(obj == null) {
				out.nullValue();
			} else if(obj instanceof Integer) {
				out.value((Integer) obj);
			} else if(obj instanceof Double) {
				out.value((Double) obj);
			} else {
				out.value(obj.toString());
			}
		}
		out.endArray();
		out.endObject();
		out.endObject();
	}
}    
    
    
    

    




    
    
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