org.beangle.serializer.json.AbstractJsonWriter.scala Maven / Gradle / Ivy

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/*
 * Beangle, Agile Development Scaffold and Toolkits.
 *
 * Copyright © 2005, The Beangle Software.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see .
 */
package org.beangle.serializer.json

import java.io.Writer

import org.beangle.serializer.text.io.AbstractWriter
import org.beangle.serializer.text.marshal.Type.{Boolean, Number}
import org.beangle.serializer.text.marshal.{MarshallerRegistry, MarshallingContext}

abstract class AbstractJsonWriter(val writer: Writer, val registry: MarshallerRegistry) extends AbstractWriter {

  private val quotedClazzes: Set[Class[_]] = Set(classOf[String], classOf[Long], classOf[java.lang.Long],
    classOf[java.math.BigInteger], classOf[java.math.BigDecimal],
    classOf[scala.math.BigInt], classOf[scala.math.BigDecimal]
  )

  override def setValue(text: String): Unit = {
    val peekClz = this.pathStack.peek().clazz
    writeText(text.toCharArray, needQuoted(peekClz))
  }

  private def needQuoted(clazz: Class[_]): Boolean = {
    if (quotedClazzes.contains(clazz)) {
      true
    } else {
      val targetType = registry.lookup(clazz).targetType
      targetType != Boolean && targetType != Number
    }
  }

  protected def writeText(text: Array[Char], quoted: Boolean): Unit = {
    val length = text.length
    if (quoted) writer.write("\"")
    (0 until length) foreach { i =>
      val c = text(i)
      c match {
        case '"' => writer.write("\\\"")
        case '\\' => writer.write("\\\\")
        case '\b' => writer.write("\\b")
        case '\f' => writer.write("\\f")
        case '\n' => writer.write("\\n")
        case '\r' => writer.write("\\r")
        case '\t' => writer.write("\\t")
        case _ =>
          if (c > 0x1f) {
            writer.write(c)
          } else {
            writer.write("\\u")
            val hex = "000" + Integer.toHexString(c)
            writer.write(hex.substring(hex.length() - 4))
          }
      }
    }
    if (quoted) writer.write("\"")
  }

  final override def flush(): Unit = {
    writer.flush()
  }

  final override def close(): Unit = {
    writer.close()
  }

  override def start(context: MarshallingContext): Unit = {

  }

  override def end(context: MarshallingContext): Unit = {

  }
}