juneau-core/juneau-marshall/src/main/java/org/apache/juneau/csv/CsvParser.java

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// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
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package org.apache.juneau.csv;

import java.util.*;
import java.util.concurrent.*;

import org.apache.juneau.*;
import org.apache.juneau.annotation.*;
import org.apache.juneau.parser.*;

/**
 * TODO - Work in progress.  CSV parser.
 */
@ConfigurableContext
public class CsvParser extends ReaderParser implements CsvMetaProvider, CsvCommon {

	//-------------------------------------------------------------------------------------------------------------------
	// Configurable properties
	//-------------------------------------------------------------------------------------------------------------------

	static final String PREFIX = "CsvParser";

	//-------------------------------------------------------------------------------------------------------------------
	// Predefined instances
	//-------------------------------------------------------------------------------------------------------------------

	/** Default parser, all default settings.*/
	public static final CsvParser DEFAULT = new CsvParser(PropertyStore.DEFAULT);


	//-------------------------------------------------------------------------------------------------------------------
	// Instance
	//-------------------------------------------------------------------------------------------------------------------

	private final Map<ClassMeta<?>,CsvClassMeta> csvClassMetas = new ConcurrentHashMap<>();
	private final Map<BeanPropertyMeta,CsvBeanPropertyMeta> csvBeanPropertyMetas = new ConcurrentHashMap<>();

	/**
	 * Constructor.
	 *
	 * @param ps The property store containing all the settings for this object.
	 */
	public CsvParser(PropertyStore ps) {
		super(ps, "text/csv");
	}

	@Override /* Context */
	public CsvParserBuilder builder() {
		return new CsvParserBuilder(getPropertyStore());
	}

	/**
	 * Instantiates a new clean-slate {@link CsvParserBuilder} object.
	 *
	 * <p>
	 * Note that this method creates a builder initialized to all default settings, whereas {@link #builder()} copies
	 * the settings of the object called on.
	 *
	 * @return A new {@link CsvParserBuilder} object.
	 */
	public static CsvParserBuilder create() {
		return new CsvParserBuilder();
	}

	@Override /* Parser */
	public CsvParserSession createSession() {
		return createSession(createDefaultSessionArgs());
	}

	@Override /* Parser */
	public CsvParserSession createSession(ParserSessionArgs args) {
		return new CsvParserSession(this, args);
	}

	//-----------------------------------------------------------------------------------------------------------------
	// Extended metadata
	//-----------------------------------------------------------------------------------------------------------------

	@Override /* CsvMetaProvider */
	public CsvClassMeta getCsvClassMeta(ClassMeta<?> cm) {
		CsvClassMeta m = csvClassMetas.get(cm);
		if (m == null) {
			m = new CsvClassMeta(cm, this);
			csvClassMetas.put(cm, m);
		}
		return m;
	}

	@Override /* CsvMetaProvider */
	public CsvBeanPropertyMeta getCsvBeanPropertyMeta(BeanPropertyMeta bpm) {
		if (bpm == null)
			return CsvBeanPropertyMeta.DEFAULT;
		CsvBeanPropertyMeta m = csvBeanPropertyMetas.get(bpm);
		if (m == null) {
			m = new CsvBeanPropertyMeta(bpm.getDelegateFor(), this);
			csvBeanPropertyMetas.put(bpm, m);
		}
		return m;
	}

	//-----------------------------------------------------------------------------------------------------------------
	// Other methods
	//-----------------------------------------------------------------------------------------------------------------

	@Override /* Context */
	public ObjectMap toMap() {
		return super.toMap()
			.append("CsvParser", new DefaultFilteringObjectMap());
	}
}