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A connector library for the insanely fast HEXONET backend API.
package net.hexonet.apiconnector;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* Response covers all functionality to wrap a Backend API Response like accessing data
*
* @author Kai Schwarz
* @version %I%, %G%
* @since 2.0
*/
public class Response extends ResponseTemplate {
/**
* The API Command used within this request
*/
private Map command;
/**
* Column names available in this responsse NOTE: this includes also FIRST, LAST, LIMIT, COUNT,
* TOTAL and maybe further specific columns in case of a list query
*/
private ArrayList columnkeys;
/**
* Container of Column Instances
*/
private ArrayList columns;
/**
* Record Index we currently point to in record list
*/
private int recordIndex;
/**
* Record List (List of rows)
*/
private ArrayList records;
/**
* Constructor
*
* @param raw API plain response
* @param cmd API command used within this request
*/
@SuppressWarnings("unchecked") // not really a good way ...
public Response(String raw, Map cmd) {
super(raw);
this.command = new HashMap(cmd);
this.columnkeys = new ArrayList();
this.columns = new ArrayList();
this.recordIndex = 0;
this.records = new ArrayList();
Object property = this.hash.get("PROPERTY");
if (property != null) {
Map> p = (HashMap>) property;
Iterator>> it = p.entrySet().iterator();
int count = 0;
while (it.hasNext()) {
Map.Entry> pair = it.next();
this.addColumn(pair.getKey(), pair.getValue());
int len = pair.getValue().size();
if (len > count) {
count = len;
}
}
for (int i = 0; i < count; i++) {
Map d = new HashMap();
for (String key : this.columnkeys) {
Column col = this.getColumn(key);
if (col != null) {
String v = col.getDataByIndex(i);
if (v != null) {
d.put(key, v);
}
}
}
this.addRecord(d);
}
}
}
/**
* Add a column to the column list
*
* @param key column name
* @param data array of column data
* @return Current Response Instance for method chaining
*/
public Response addColumn(String key, ArrayList data) {
Column col = new Column(key, data);
this.columns.add(col);
this.columnkeys.add(key);
return this;
}
/**
* Add a record to the record list
*
* @param h row data
* @return Current Response Instance for method chaining
*/
public Response addRecord(Map h) {
this.records.add(new Record(h));
return this;
}
/**
* Get column by column name
*
* @param key column name
* @return column instance or null if column does not exist
*/
public Column getColumn(String key) {
if (this.hasColumn(key)) {
return this.columns.get(this.columnkeys.indexOf(key));
}
return null;
}
/**
* Get Data by Column Name and Index
*
* @param colkey column name
* @param index column data index
* @return column data at index or null if not found
*/
public String getColumnIndex(String colkey, int index) {
Column col = this.getColumn(colkey);
if (col != null) {
return col.getDataByIndex(index);
}
return null;
}
/**
* Get Column Names
*
* @return Array of Column Names
*/
public ArrayList getColumnKeys() {
return this.columnkeys;
}
/**
* Get List of Columns
*
* @return Array of Columns
*/
public ArrayList getColumns() {
return this.columns;
}
/**
* Get Command used in this request
*
* @return command
*/
public Map getCommand() {
return this.command;
}
/**
* Get Page Number of current List Query
*
* @return page number or -1 in case of a non-list response
*/
public int getCurrentPageNumber() {
int first = this.getFirstRecordIndex();
int limit = this.getRecordsLimitation();
if ((first != -1) && (limit > 0)) {
return (int) Math.floor((double) first / (double) limit) + 1;
}
return -1;
}
/**
* Get Record of current record index
*
* @return Record or null in case of a non-list response
*/
public Record getCurrentRecord() {
if (this.hasCurrentRecord()) {
return this.records.get(this.recordIndex);
}
return null;
}
/**
* Get Index of first row in this response
*
* @return first row index; -1 if record list is empty
*/
public int getFirstRecordIndex() {
Column col = this.getColumn("FIRST");
if (col != null) {
String f = col.getDataByIndex(0);
if (f != null) {
return Integer.parseInt(f);
}
}
if (this.records.size() > 0) {
return 0;
}
return -1;
}
/**
* Get last record index of the current list query
*
* @return record index or -1 for a non-list response
*/
public int getLastRecordIndex() {
Column col = this.getColumn("LAST");
if (col != null) {
String l = col.getDataByIndex(0);
if (l != null) {
return Integer.parseInt(l);
}
}
int len = this.getRecordsCount();
if (len > 0) {
return (len - 1);
}
return -1;
}
/**
* Get Response as List Hash including useful meta data for tables
*
* @return hash including list meta data and array of rows in hash notation
*/
public Map getListHash() {
ArrayList> lh = new ArrayList>();
ArrayList recs = this.getRecords();
for (Record rec : recs) {
lh.add(rec.getData());
}
HashMap hm = new HashMap();
HashMap me = new HashMap();
me.put("columns", this.getColumnKeys());
me.put("pg", this.getPagination());
hm.put("LIST", lh);
hm.put("meta", me);
return hm;
}
/**
* Get next record in record list
*
* @return Record or null in case there's no further record
*/
public Record getNextRecord() {
if (this.hasNextRecord()) {
return this.records.get(++this.recordIndex);
}
return null;
}
/**
* Get Page Number of next list query
*
* @return page number or -1 if there's no next page
*/
public int getNextPageNumber() {
int cp = this.getCurrentPageNumber();
if (cp == -1) {
return -1;
}
int page = cp + 1;
int pages = this.getNumberOfPages();
return (page <= pages ? page : pages);
}
/**
* Get the number of pages available for this list query
*
* @return number of pages
*/
public int getNumberOfPages() {
int t = this.getRecordsTotalCount();
int limit = this.getRecordsLimitation();
if (t > 0 && limit > 0) {
return (int) Math.ceil((double) t / (double) this.getRecordsLimitation());
}
return 0;
}
/**
* Get object containing all paging data
*
* @return paginator data
*/
public Map getPagination() {
Map mp = new HashMap();
mp.put("COUNT", this.getRecordsCount());
mp.put("CURRENTPAGE", this.getCurrentPageNumber());
mp.put("FIRST", this.getFirstRecordIndex());
mp.put("LAST", this.getLastRecordIndex());
mp.put("LIMIT", this.getRecordsLimitation());
mp.put("NEXTPAGE", this.getNextPageNumber());
mp.put("PAGES", this.getNumberOfPages());
mp.put("PREVIOUSPAGE", this.getPreviousPageNumber());
mp.put("TOTAL", this.getRecordsTotalCount());
return mp;
}
/**
* Get Page Number of previous list query
*
* @return page number or -1 if there's no previous page
*/
public int getPreviousPageNumber() {
int cp = this.getCurrentPageNumber();
if (cp == -1) {
return -1;
}
int pp = cp - 1;
if (pp > 0) {
return pp;
}
return -1;
}
/**
* Get previous record in record list
*
* @return Record or null if there's no previous record
*/
public Record getPreviousRecord() {
if (this.hasPreviousRecord()) {
return this.records.get(--this.recordIndex);
}
return null;
}
/**
* Get Record at given index
*
* @param idx record index
* @return Record or null if index does not exist
*/
public Record getRecord(int idx) {
if (idx >= 0 && this.records.size() > idx) {
return this.records.get(idx);
}
return null;
}
/**
* Get all Records
*
* @return list of records
*/
public ArrayList getRecords() {
return this.records;
}
/**
* Get count of rows in this response
*
* @return count of rows
*/
public int getRecordsCount() {
return this.records.size();
}
/**
* Get total count of records available for the list query
*
* @return total count of records or count of records for a non-list response
*/
public int getRecordsTotalCount() {
Column col = this.getColumn("TOTAL");
if (col != null) {
String t = col.getDataByIndex(0);
if (t != null) {
return Integer.parseInt(t);
}
}
return this.getRecordsCount();
}
/**
* Get limit(ation) setting of the current list query This is the count of requested rows
*
* @return limit setting or count requested rows
*/
public int getRecordsLimitation() {
Column col = this.getColumn("LIMIT");
if (col != null) {
String l = col.getDataByIndex(0);
if (l != null) {
return Integer.parseInt(l);
}
}
return this.getRecordsCount();
}
/**
* Check if this list query has a next page
*
* @return boolean result
*/
public boolean hasNextPage() {
int cp = this.getCurrentPageNumber();
if (cp == -1) {
return false;
}
return (cp + 1 <= this.getNumberOfPages());
}
/**
* Check if this list query has a previous page
*
* @return boolean result
*/
public boolean hasPreviousPage() {
int cp = this.getCurrentPageNumber();
if (cp == -1) {
return false;
}
return ((cp - 1) > 0);
}
/**
* Reset index in record list back to zero
*
* @return Current Response Instance for method chaining
*/
public Response rewindRecordList() {
this.recordIndex = 0;
return this;
}
/**
* Check if column exists in response
*
* @param key column name
* @return boolean result
*/
private boolean hasColumn(String key) {
return (this.columnkeys.indexOf(key) != -1);
}
/**
* Check if the record list contains a record for the current record index in use
*
* @return boolean result
*/
private boolean hasCurrentRecord() {
int len = this.records.size();
return (len > 0 && this.recordIndex >= 0 && this.recordIndex < len);
}
/**
* Check if the record list contains a next record for the current record index in use
*
* @return boolean result
*/
private boolean hasNextRecord() {
int next = this.recordIndex + 1;
return (this.hasCurrentRecord() && (next < this.records.size()));
}
/**
* Check if the record list contains a previous record for the current record index in use
*
* @return boolean result
*/
private boolean hasPreviousRecord() {
return (this.recordIndex > 0 && this.hasCurrentRecord());
}
}