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package org.apache.juneau.marshaller;

import java.io.*;
import java.lang.reflect.*;

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

/**
 * A subclass of {@link Marshaller} for stream-based serializers and parsers.
 *
 * <h5 class='section'>See Also:</h5><ul>
 *    <li class='link'><a class="doclink" href="../../../../index.html#jm.Marshallers">Marshallers</a>
 * </ul>
 */
public class StreamMarshaller extends Marshaller {

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

   private final OutputStreamSerializer s;
   private final InputStreamParser p;

   /**
    * Constructor.
    *
    * @param s
    *    The serializer to use for serializing output.
    *    <br>Must not be <jk>null</jk>.
    * @param p
    *    The parser to use for parsing input.
    *    <br>Must not be <jk>null</jk>.
    */
   public StreamMarshaller(OutputStreamSerializer s, InputStreamParser p) {
      super(s, p);
      this.s = s;
      this.p = p;
   }

   /**
    * Same as {@link #read(Object,Class)} but reads from a byte array and thus doesn't throw an <c>IOException</c>.
    *
    * <p>
    * This is the preferred parse method for simple types since you don't need to cast the results.
    *
    * <h5 class='section'>Examples:</h5>
    * <p class='bjava'>
    *    Marshaller <jv>marshaller</jv>  = Json.<jsf>DEFAULT</jsf>;
    *
    *    <jc>// Parse into a string.</jc>
    *    String <jv>string</jv> = <jv>marshaller</jv> .read(<jv>json</jv>, String.<jk>class</jk>);
    *
    *    <jc>// Parse into a bean.</jc>
    *    MyBean <jv>bean</jv> = <jv>marshaller</jv> .read(<jv>json</jv>, MyBean.<jk>class</jk>);
    *
    *    <jc>// Parse into a bean array.</jc>
    *    MyBean[] <jv>beanArray</jv> = <jv>marshaller</jv> .read(<jv>json</jv>, MyBean[].<jk>class</jk>);
    *
    *    <jc>// Parse into a linked-list of objects.</jc>
    *    List <jv>list</jv> = <jv>marshaller</jv> .read(<jv>json</jv>, LinkedList.<jk>class</jk>);
    *
    *    <jc>// Parse into a map of object keys/values.</jc>
    *    Map <jv>map</jv> = <jv>marshaller</jv> .read(<jv>json</jv>, TreeMap.<jk>class</jk>);
    * </p>
    *
    * @param <T> The class type of the object being created.
    * @param input The input.
    * @param type The object type to create.
    * @return The parsed object.
    * @throws ParseException Malformed input encountered.
    */
   public final <T> T read(byte[] input, Class<T> type) throws ParseException {
      try {
         return p.parse(input, type);
      } catch (IOException e) {
         throw new ParseException(e);
      }
   }

   /**
    * Same as {@link #read(Object,Type,Type...)} but reads from a byte array and thus doesn't throw an <c>IOException</c>.
    *
    * @param <T> The class type of the object to create.
    * @param input The input.
    * @param type
    *    The object type to create.
    *    <br>Can be any of the following: {@link ClassMeta}, {@link Class}, {@link ParameterizedType}, {@link GenericArrayType}
    * @param args
    *    The type arguments of the class if it's a collection or map.
    *    <br>Can be any of the following: {@link ClassMeta}, {@link Class}, {@link ParameterizedType}, {@link GenericArrayType}
    *    <br>Ignored if the main type is not a map or collection.
    * @return The parsed object.
    * @throws ParseException Malformed input encountered.
    * @see BeanSession#getClassMeta(Type,Type...) for argument syntax for maps and collections.
    */
   public final <T> T read(byte[] input, Type type, Type...args) throws ParseException {
      try {
         return p.parse(input, type, args);
      } catch (IOException e) { throw new ParseException(e); }
   }

   /**
    * Serializes a POJO directly to a <code><jk>byte</jk>[]</code>.
    *
    * @param o The object to serialize.
    * @return
    *    The serialized object.
    * @throws SerializeException If a problem occurred trying to convert the output.
    */
   public final byte[] write(Object o) throws SerializeException {
      return s.serialize(o);
   }
}