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package net.sf.basedb.reggie.plugins.release; |
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import java.time.LocalDateTime; |
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import java.time.temporal.ChronoField; |
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import java.util.Collection; |
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import java.util.Collections; |
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import java.util.List; |
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import org.json.simple.JSONArray; |
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|
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import net.sf.basedb.core.DbControl; |
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import net.sf.basedb.core.Nameable; |
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import net.sf.basedb.reggie.dao.ReggieItem; |
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import net.sf.basedb.util.Values; |
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import net.sf.basedb.util.formatter.Formatter; |
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/** |
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Abstract base class for writing cohort data tables. |
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Subclasses must implement the {@link #writeCohortData(CohortItem)} |
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method and make sure the header line is written first. |
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|
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Implementing classes need to be thread-safe since they are |
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used with multiple exporter threads at the same time. |
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See {@link ReleaseExporter#exportCohortData()}. |
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|
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@author nicklas |
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@since 4.5 |
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*/ |
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public abstract class CohortWriter |
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{ |
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|
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/** |
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Formatter for displaying the name of ReggieItem:s |
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*/ |
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public static final Formatter<ReggieItem<?>> ITEM_TO_NAME = new Formatter<ReggieItem<?>>() |
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{ |
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@Override |
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public String format(ReggieItem<?> item) |
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{ |
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return item == null ? null : item.getName(); |
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} |
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@Override |
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public ReggieItem<?> parseString(String s) |
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{ |
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return null; |
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} |
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}; |
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/** |
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Checks if a (non-null) date+time is at midnight or not. |
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@since 4.10 |
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*/ |
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public static boolean atMidnight(LocalDateTime dateTime) |
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{ |
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return dateTime.get(ChronoField.MINUTE_OF_DAY) == 0; |
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} |
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private final DbControl dc; |
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private final ReleaseWriterOptions options; |
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|
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protected CohortWriter(DbControl dc, ReleaseWriterOptions options) |
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{ |
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this.dc = dc; |
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this.options = options; |
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} |
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|
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/** |
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Get the DbControl used in the writing transaction. It should not be used |
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for reading cohort item data since that may consume too much memory as the |
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cache in Hibernate is filled. |
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*/ |
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public DbControl getDbControl() |
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{ |
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return dc; |
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} |
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|
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/** |
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Get the options for this release writer. |
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*/ |
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public ReleaseWriterOptions getOptions() |
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{ |
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return options; |
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} |
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/** |
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Get item data as a JSON object. Subclasses that |
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wants to return JSON data should override this |
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method and may return any number of objects. |
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|
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@param item The cohort item |
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@return A JSON object, or null if no JSON should |
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be exported |
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@since 4.21 |
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*/ |
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public abstract JSONArray toJSONObjects(CohortItem item); |
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|
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/** |
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Get type definitions that are output as part of |
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JSON data in {@link #toJSONObject(CohortItem)}. |
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The information from all writers are collected into |
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"typedefs.json" file which is stored together with |
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the exported files and used for automatic creation of |
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types on the import side. |
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|
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The default implementation return an empty list. |
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Subclasses that need to define types should override |
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this method. |
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@since 4.10 |
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*/ |
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public List<CohortTypeDef> getTypeDefsInJSON() |
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{ |
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return Collections.emptyList(); |
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} |
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/** |
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Helper method for getting the name of an item. |
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Return null if the item is null. |
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*/ |
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public String getName(Nameable item) |
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{ |
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return item == null ? null : item.getName(); |
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} |
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|
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/** |
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Helper method for getting the name of an item. |
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Return null if the item is null. |
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@since 4.44 |
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*/ |
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public String getName(ReggieItem<?> item) |
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{ |
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return item == null ? null : item.getName(); |
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} |
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|
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/** |
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Helper method for getting the name of |
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multiple items as a comma-separated list. |
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*/ |
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public String getNames(Collection<? extends ReggieItem<?>> items) |
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{ |
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return Values.getString(items, ",", true, ITEM_TO_NAME); |
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} |
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|
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} |