juneau-core/juneau-marshall/src/main/java/org/apache/juneau/html/HtmlParser.java

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package org.apache.juneau.html;

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

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

/**
 * Parses text generated by the {@link HtmlSerializer} class back into a POJO model.
 *
 * <h5 class='topic'>Media types</h5>
 *
 * Handles <c>Content-Type</c> types:  <bc>text/html</bc>
 *
 * <h5 class='topic'>Description</h5>
 *
 * See the {@link HtmlSerializer} class for a description of the HTML generated.
 * <p>
 * This class is used primarily for automated testing of the {@link HtmlSerializer} class.
 */
@ConfigurableContext
public class HtmlParser extends XmlParser implements HtmlMetaProvider {

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

	static final String PREFIX = "HtmlParser";

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

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


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

	private final Map<ClassMeta<?>,HtmlClassMeta> htmlClassMetas = new ConcurrentHashMap<>();
	private final Map<BeanPropertyMeta,HtmlBeanPropertyMeta> htmlBeanPropertyMetas = new ConcurrentHashMap<>();

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

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

	/**
	 * Instantiates a new clean-slate {@link HtmlParserBuilder} object.
	 *
	 * <p>
	 * This is equivalent to simply calling <code><jk>new</jk> HtmlParserBuilder()</code>.
	 *
	 * <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 HtmlParserBuilder} object.
	 */
	public static HtmlParserBuilder create() {
		return new HtmlParserBuilder();
	}

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

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

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

	@Override /* HtmlMetaProvider */
	public HtmlClassMeta getHtmlClassMeta(ClassMeta<?> cm) {
		HtmlClassMeta m = htmlClassMetas.get(cm);
		if (m == null) {
			m = new HtmlClassMeta(cm, this);
			htmlClassMetas.put(cm, m);
		}
		return m;
	}

	@Override /* HtmlMetaProvider */
	public HtmlBeanPropertyMeta getHtmlBeanPropertyMeta(BeanPropertyMeta bpm) {
		if (bpm == null)
			return HtmlBeanPropertyMeta.DEFAULT;
		HtmlBeanPropertyMeta m = htmlBeanPropertyMetas.get(bpm);
		if (m == null) {
			m = new HtmlBeanPropertyMeta(bpm.getDelegateFor(), this);
			htmlBeanPropertyMetas.put(bpm, m);
		}
		return m;
	}

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

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