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The BellaDati SDK allows accessing a BellaDati server from 3rd-party applications using Java. This project contains the implementation for standard Java.
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package com.belladati.sdk.impl;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.Locale;

import com.belladati.sdk.dataset.Attribute;
import com.belladati.sdk.dataset.DataSet;
import com.belladati.sdk.dataset.Indicator;
import com.belladati.sdk.dataset.data.DataTable;
import com.belladati.sdk.dataset.source.DataSource;
import com.belladati.sdk.impl.AttributeImpl.InvalidAttributeException;
import com.belladati.sdk.impl.IndicatorImpl.InvalidIndicatorException;
import com.belladati.sdk.impl.ReportInfoImpl.InvalidReportException;
import com.belladati.sdk.report.ReportInfo;
import com.belladati.sdk.util.CachedList;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ArrayNode;

class DataSetImpl implements DataSet {

	private final BellaDatiServiceImpl service;

	private final String id;
	private final String name;
	private final String description;
	private final String ownerName;
	private final Date lastChange;
	private final List attributes;
	private final List indicators;
	private final List reports;
	private final LocalizationImpl localization;

	DataSetImpl(BellaDatiServiceImpl service, JsonNode json) {
		this.service = service;

		this.id = json.get("id").asText();
		this.name = json.get("name").asText();
		this.description = json.hasNonNull("description") ? json.get("description").asText() : "";
		this.ownerName = json.get("owner").asText();

		if (json.hasNonNull("lastChange")) {
			SimpleDateFormat format = new SimpleDateFormat(BellaDatiServiceImpl.DATE_TIME_FORMAT);
			Date lastChange;
			try {
				lastChange = format.parse(json.get("lastChange").asText());
			} catch (ParseException e) {
				lastChange = null;
			}
			this.lastChange = lastChange;
		} else {
			this.lastChange = null;
		}

		List attributes = new ArrayList();
		if (json.hasNonNull("attributes") && json.get("attributes") instanceof ArrayNode) {
			for (JsonNode attribute : (ArrayNode) json.get("attributes")) {
				try {
					attributes.add(new AttributeImpl(service, id, attribute));
				} catch (InvalidAttributeException e) {
					// nothing to do, just ignore the attribute
				}
			}
		}
		this.attributes = Collections.unmodifiableList(attributes);

		List indicators = new ArrayList();
		if (json.hasNonNull("indicators") && json.get("indicators") instanceof ArrayNode) {
			for (JsonNode indicator : (ArrayNode) json.get("indicators")) {
				try {
					indicators.add(new IndicatorImpl(indicator));
				} catch (InvalidIndicatorException e) {
					// nothing to do, just ignore the indicator
				}
			}
		}
		this.indicators = Collections.unmodifiableList(indicators);

		List reports = new ArrayList();
		if (json.hasNonNull("reports") && json.get("reports") instanceof ArrayNode) {
			for (JsonNode report : (ArrayNode) json.get("reports")) {
				try {
					reports.add(new ReportInfoImpl(service, report));
				} catch (InvalidReportException e) {
					// nothing to do, just ignore the report
				}
			}
		}
		this.reports = Collections.unmodifiableList(reports);

		this.localization = new LocalizationImpl(json);
	}

	@Override
	public String getId() {
		return id;
	}

	@Override
	public String getName() {
		return name;
	}

	@Override
	public String getName(Locale locale) {
		return localization.getName(locale);
	}

	@Override
	public boolean hasLocalization(Locale locale) {
		return localization.hasLocalization(locale);
	}

	@Override
	public String getDescription() {
		return description;
	}

	@Override
	public String getOwnerName() {
		return ownerName;
	}

	@Override
	public Date getLastChange() {
		return lastChange != null ? (Date) lastChange.clone() : null;
	}

	@Override
	public String toString() {
		return name;
	}

	@Override
	public boolean equals(Object obj) {
		if (obj instanceof DataSetImpl) {
			return id.equals(((DataSetImpl) obj).id);
		}
		return false;
	}

	@Override
	public int hashCode() {
		return id.hashCode();
	}

	@Override
	public List getAttributes() {
		return attributes;
	}

	@Override
	public List getIndicators() {
		return indicators;
	}

	@Override
	public List getReports() {
		return reports;
	}

	@Override
	public CachedList getDataSources() {
		return service.getDataSources(id);
	}

	@Override
	public DataTable createDataTable() {
		List columns = new ArrayList();
		for (Attribute attribute : attributes) {
			columns.add(attribute.getCode());
		}
		for (Indicator indicator : indicators) {
			columns.add(indicator.getCode());
		}
		return DataTable.createBasicInstance(columns);
	}

	@Override
	public DataSet uploadData(DataTable data) {
		service.uploadData(id, data);
		return this;
	}
}