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package com.avaje.ebean.text.json;

import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;

import com.avaje.ebeaninternal.server.type.ModifyAwareList;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;

/**
 * Utility that converts between JSON content and simple java Maps/Lists.
 */
public class EJson {

  /**
   * Write the nested Map/List as json.
   */
  public static String write(Object object) throws IOException {
    return EJsonWriter.write(object);
  }
  
  /**
   * Write the nested Map/List as json to the writer.
   */
  public static void write(Object object, Writer writer) throws IOException {
    EJsonWriter.write(object, writer);
  }
  
  /**
   * Write the nested Map/List as json to the jsonGenerator.
   */
  public static void write(Object object, JsonGenerator jsonGenerator) throws IOException {
    EJsonWriter.write(object, jsonGenerator);
  }

  /**
   * Write the collection as json array to the jsonGenerator.
   */
  public static void writeCollection(Collection collection, JsonGenerator jsonGenerator) throws IOException {
    EJsonWriter.writeCollection(collection, jsonGenerator);
  }

  /**
   * Parse the json and return as a Map additionally specifying if the returned map should
   * be modify aware meaning that it can detect when it has been modified.
   */
  public static Map parseObject(String json, boolean modifyAware) throws IOException {
    return EJsonReader.parseObject(json, modifyAware);
  }

  /**
   * Parse the json and return as a Map.
   */
  public static Map parseObject(String json) throws IOException {
    return EJsonReader.parseObject(json);
  }

  /**
   * Parse the json and return as a Map taking a reader.
   */
  public static Map parseObject(Reader reader, boolean modifyAware) throws IOException {
    return EJsonReader.parseObject(reader, modifyAware);
  }

  /**
   * Parse the json and return as a Map taking a reader.
   */
  public static Map parseObject(Reader reader) throws IOException {
    return EJsonReader.parseObject(reader);
  }
  
  /**
   * Parse the json and return as a Map taking a JsonParser.
   */
  public static Map parseObject(JsonParser parser) throws IOException {
    return EJsonReader.parseObject(parser);
  }

  /**
   * Parse the json and return as a Map taking a JsonParser and a starting token.
   * 

* Used when the first token is checked to see if the value is null prior to calling this. *

*/ public static Map parseObject(JsonParser parser, JsonToken token) throws IOException { return EJsonReader.parseObject(parser, token); } /** * Parse the json and return as a modify aware List. */ public static List parseList(String json, boolean modifyAware) throws IOException { return EJsonReader.parseList(json, modifyAware); } /** * Parse the json and return as a List. */ public static List parseList(String json) throws IOException { return EJsonReader.parseList(json); } /** * Parse the json and return as a List taking a Reader. */ public static List parseList(Reader reader) throws IOException { return EJsonReader.parseList(reader); } /** * Parse the json and return as a List taking a JsonParser. */ public static List parseList(JsonParser parser) throws IOException { return EJsonReader.parseList(parser, false); } /** * Parse the json returning as a List taking into account the current token. */ public static List parseList(JsonParser parser, JsonToken currentToken) throws IOException { return (List)EJsonReader.parse(parser, currentToken, false); } /** * Parse the json and return as a List or Map. */ public static Object parse(String json) throws IOException { return EJsonReader.parse(json); } /** * Parse the json and return as a List or Map. */ public static Object parse(Reader reader) throws IOException { return EJsonReader.parse(reader); } /** * Parse the json and return as a List or Map. */ public static Object parse(JsonParser parser) throws IOException { return EJsonReader.parse(parser); } /** * Parse the json returning a Set that might be modify aware. */ public static Set parseSet(String json, boolean modifyAware) throws IOException { List list = parseList(json, modifyAware); if (list == null) { return null; } return ((ModifyAwareList)list).asSet(); } }