io.odysz.transact.sql.PageInf Maven / Gradle / Ivy

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package io.odysz.transact.sql;

import static io.odysz.common.LangExt.eq;
import static io.odysz.common.LangExt.isNull;
import static io.odysz.common.LangExt.len;

import java.util.ArrayList;
import java.util.HashMap;

import io.odysz.anson.Anson;

/**
 * DB records' page information.
 * 
 * This type should presented in all request with A = records in the near future.
 * 
 * Use case:
 * 1. Semantic.jserv/io.oz.spreadsheet.SpreadsheetReq.pageInf,

 *    Anclient.ts:

 *    curriculum/views/north/AllDecissionsComp.conds

 *    curriculum/views/north/MyComp.conds

 *    ...

 *    
 * 2. Docsync.jserv/io.oz.jserv.dbsync.DBSyncReq.pageInf,

 *    Anclient.java:

 *    Docsync.jserv/io.oz.jserv.dbsync.DBWorker#syncTabl()

 *    
 * 3. Sandbox, Album-jserv/Streetier.stree
 * 
 * 4. ...
 * @author [email protected]
 *
 */
public class PageInf extends Anson {

	public long page;
	public long size;
	public long total;
	public ArrayList arrCondts;
	public HashMap mapCondts;
	
	public PageInf() {
		this.arrCondts = new ArrayList();
		this.mapCondts = new HashMap();
	}
	
	/**
	 * @param page
	 * @param size
	 * @param condt n0, v0, n1, v1, ...
	 */
	public PageInf(long page, long size, String... condt) {
		this.page = page;
		this.size = size;
		this.arrCondts = new ArrayList();

		if (!isNull(condt))
			// arrCondts.add(condt);
			for (int cx = 0; cx < condt.length; cx+=2)
				arrCondts.add(new String[] {condt[cx], condt[cx+1]});

		mapCondts = new HashMap();
	}

	/**
	 * condts = [[...arg0s], string[] other-args]
	 * @param arg0s
	 * @return this
	 */
	public PageInf insertCondt(String... arg0s) {
		this.arrCondts.add(0, arg0s);
		return this;
	}

	public PageInf mergeArgs() {
		if (len(mapCondts) > 0)
			for (String k : mapCondts.keySet())
				arrCondts.add(new String[] {k, (String)mapCondts.get(k)});
		mapCondts.clear();
		return this;
	}

	/**
	 * Reshape 2D array of n-v pairs to string array for string.format().
	 * 
	 * @return args array
	 */
	public String[] arrCondts2args() {
		ArrayList args = new ArrayList(arrCondts.size());
		for (String[] arg : arrCondts) {
			args.add(isNull(arg) ? "" : arg[arg.length - 1]);
		}
		return args.toArray(new String[0]);
	}
	
	public String getArg(String argName) {
		if (mapCondts != null && mapCondts.containsKey(argName))
			return (String)mapCondts.get(argName);
		else if (arrCondts != null) {
			for (String[] nv : arrCondts)
				if (eq(nv[0], argName))
					return nv[1];
		}
		return null;
	}
}