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• JsonWriter.java

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net.minidev.json.reader.JsonWriter Maven / Gradle / Ivy

package net.minidev.json.reader;

import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Date;
import java.util.LinkedList;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import net.minidev.json.JSONAware;
import net.minidev.json.JSONAwareEx;
import net.minidev.json.JSONStreamAware;
import net.minidev.json.JSONStreamAwareEx;
import net.minidev.json.JSONStyle;
import net.minidev.json.JSONValue;

public class JsonWriter {
	private ConcurrentHashMap, JsonWriterI> data;
	private LinkedList writerInterfaces;

	public JsonWriter() {
		data = new ConcurrentHashMap, JsonWriterI>();
		writerInterfaces = new LinkedList();
		init();
	}

	/**
	 * remap field name in custom classes
	 * 
	 * @param fromJava
	 *            field name in java
	 * @param toJson
	 *            field name in json
	 * @since 2.1.1
	 */
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public  void remapField(Class type, String fromJava, String toJson) {
		JsonWriterI map = this.getWrite(type);
		if (!(map instanceof BeansWriterASMRemap)) {
			map = new BeansWriterASMRemap();
			registerWriter(map, type);
		}
		((BeansWriterASMRemap) map).renameField(fromJava, toJson);
	}

	static class WriterByInterface {
		public Class _interface;
		public JsonWriterI _writer;

		public WriterByInterface(Class _interface, JsonWriterI _writer) {
			this._interface = _interface;
			this._writer = _writer;
		}
	}
	
	/**
	 * try to find a Writer by Cheking implemented interface
	 * @param clazz class to serialize
	 * @return a Writer or null
	 */
	@SuppressWarnings("rawtypes")
	public JsonWriterI getWriterByInterface(Class clazz) {
		for (WriterByInterface w : writerInterfaces) {
			if (w._interface.isAssignableFrom(clazz))
				return w._writer;
		}
		return null;
	}

	@SuppressWarnings("rawtypes")
	public JsonWriterI getWrite(Class cls) {
		return data.get(cls);
	}

	final static public JsonWriterI JSONStreamAwareWriter = new JsonWriterI() {
		public  void writeJSONString(E value, Appendable out, JSONStyle compression) throws IOException {
			value.writeJSONString(out);
		}
	};

	final static public JsonWriterI JSONStreamAwareExWriter = new JsonWriterI() {
		public  void writeJSONString(E value, Appendable out, JSONStyle compression) throws IOException {
			value.writeJSONString(out, compression);
		}
	};

	final static public JsonWriterI JSONJSONAwareExWriter = new JsonWriterI() {
		public  void writeJSONString(E value, Appendable out, JSONStyle compression) throws IOException {
			out.append(value.toJSONString(compression));
		}
	};

	final static public JsonWriterI JSONJSONAwareWriter = new JsonWriterI() {
		public  void writeJSONString(E value, Appendable out, JSONStyle compression) throws IOException {
			out.append(value.toJSONString());
		}
	};

	final static public JsonWriterI> JSONIterableWriter = new JsonWriterI>() {
		public > void writeJSONString(E list, Appendable out, JSONStyle compression) throws IOException {
			boolean first = true;
			compression.arrayStart(out);
			for (Object value : list) {
				if (first) {
					first = false;
					compression.arrayfirstObject(out);
				} else {
					compression.arrayNextElm(out);
				}
				if (value == null)
					out.append("null");
				else
					JSONValue.writeJSONString(value, out, compression);
				compression.arrayObjectEnd(out);
			}
			compression.arrayStop(out);
		}
	};

	final static public JsonWriterI> EnumWriter = new JsonWriterI>() {
		public > void writeJSONString(E value, Appendable out, JSONStyle compression) throws IOException {
			@SuppressWarnings("rawtypes")
			String s = ((Enum) value).name();
			compression.writeString(out, s);
		}
	};

	final static public JsonWriterI> JSONMapWriter = new JsonWriterI>() {
		public > void writeJSONString(E map, Appendable out, JSONStyle compression) throws IOException {
			boolean first = true;
			compression.objectStart(out);
			/**
			 * do not use  to handle non String key maps
			 */
			for (Map.Entry entry : map.entrySet()) {
				Object v = entry.getValue();
				if (v == null && compression.ignoreNull())
					continue;
				if (first) {
					compression.objectFirstStart(out);
					first = false;
				} else {
					compression.objectNext(out);
				}
				JsonWriter.writeJSONKV(entry.getKey().toString(), v, out, compression);
				// compression.objectElmStop(out);
			}
			compression.objectStop(out);
		}
	};

	/**
	 * Json-Smart V2 Beans serialiser
	 * 
	 * Based on ASM
	 */
	final static public JsonWriterI