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

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

/**
 * Subclass of {@link Parser} for byte-based parsers.
 *
 * <h5 class='topic'>Description</h5>
 *
 * This class is typically the parent class of all byte-based parsers.
 * It has 1 abstract method to implement...
 * <ul>
 * 	<li><c>parse(InputStream, ClassMeta, Parser)</c>
 * </ul>
  */
@ConfigurableContext
public abstract class InputStreamParser extends Parser {

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

	static final String PREFIX = "InputStreamParser";

	/**
	 * Configuration property:  Binary input format.
	 *
	 * <h5 class='section'>Property:</h5>
	 * <ul>
	 * 	<li><b>ID:</b>  {@link org.apache.juneau.parser.InputStreamParser#ISPARSER_binaryFormat ISPARSER_binaryFormat}
	 * 	<li><b>Name:</b>  <js>"InputStreamParser.binaryFormat.s"</js>
	 * 	<li><b>Data type:</b>  {@link org.apache.juneau.BinaryFormat}
	 * 	<li><b>System property:</b>  <c>InputStreamParser.binaryFormat</c>
	 * 	<li><b>Environment variable:</b>  <c>INPUTSTREAMFORMAT_BINARYFORMAT</c>
	 * 	<li><b>Default:</b>  {@link org.apache.juneau.BinaryFormat#HEX}
	 * 	<li><b>Session property:</b>  <jk>false</jk>
	 * 	<li><b>Annotations:</b>
	 * 		<ul>
	 * 			<li class='ja'>{@link org.apache.juneau.parser.annotation.ParserConfig#binaryFormat()}
	 * 		</ul>
	 * 	<li><b>Methods:</b>
	 * 		<ul>
	 * 			<li class='jm'>{@link org.apache.juneau.parser.InputStreamParserBuilder#binaryFormat(BinaryFormat)}
	 * 		</ul>
	 * </ul>
	 *
	 * <h5 class='section'>Description:</h5>
	 * <p>
	 * When using the {@link #parse(Object,Class)} method on stream-based parsers and the input is a string, this defines the format to use
	 * when converting the string into a byte array.
	 *
	 *
	 * <h5 class='section'>Example:</h5>
	 * <p class='bcode w800'>
	 * 	<jc>// Create a parser that parses from BASE64.</jc>
	 * 	InputStreamParser p = MsgPackParser
	 * 		.<jsm>create</jsm>()
	 * 		.binaryFormat(<jsf>BASE64</jsf>)
	 * 		.build();
	 *
	 * 	<jc>// Same, but use property.</jc>
	 * 	InputStreamParser p = MsgPackParser
	 * 		.<jsm>create</jsm>()
	 * 		.set(<jsf>ISPARSER_binaryFormat</jsf>, <js>"BASE64"</js>)
	 * 		.build();
	 * </p>
	 */
	public static final String ISPARSER_binaryFormat = PREFIX + ".binaryFormat.s";

	static final InputStreamParser DEFAULT = new InputStreamParser(PropertyStore.create().build(), "") {
		@Override
		public InputStreamParserSession createSession(ParserSessionArgs args) {
			throw new NoSuchMethodError();
		}
	};

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

	private final BinaryFormat binaryFormat;

	/**
	 * Constructor.
	 *
	 * @param ps The property store containing all the settings for this object.
	 * @param consumes The list of media types that this parser consumes (e.g. <js>"application/json"</js>).
	 */
	protected InputStreamParser(PropertyStore ps, String...consumes) {
		super(ps, consumes);
		binaryFormat = getProperty(ISPARSER_binaryFormat, BinaryFormat.class, BinaryFormat.HEX);
	}

	@Override /* Parser */
	public final boolean isReaderParser() {
		return false;
	}

	//-----------------------------------------------------------------------------------------------------------------
	// Properties
	//-----------------------------------------------------------------------------------------------------------------

	/**
	 * Configuration property:  Binary input format.
	 *
	 * @see #ISPARSER_binaryFormat
	 * @return
	 * 	The format to use when converting strings to byte arrays.
	 */
	protected final BinaryFormat getBinaryFormat() {
		return binaryFormat;
	}

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

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