TypeAdapters.java

package com.google.gson.internal.bind;

import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonIOException;
import com.google.gson.JsonNull;
import com.google.gson.JsonObject;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSyntaxException;
import com.google.gson.TypeAdapter;
import com.google.gson.TypeAdapterFactory;
import com.google.gson.annotations.SerializedName;
import com.google.gson.internal.LazilyParsedNumber;
import com.google.gson.reflect.TypeToken;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;
import java.io.IOException;
import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.net.InetAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.sql.Timestamp;
import java.util.BitSet;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
import java.util.StringTokenizer;
import java.util.UUID;

public final class TypeAdapters
{
  public static final TypeAdapter<Class> CLASS = new TypeAdapter()
  {
    public void write(JsonWriter out, Class value) throws IOException {
      throw new UnsupportedOperationException("Attempted to serialize java.lang.Class: " + value.getName() + ". Forgot to register a type adapter?");
    }

    public Class read(JsonReader in) throws IOException
    {
      throw new UnsupportedOperationException("Attempted to deserialize a java.lang.Class. Forgot to register a type adapter?");
    }
  };

  public static final TypeAdapterFactory CLASS_FACTORY = newFactory(Class.class, CLASS);

  public static final TypeAdapter<BitSet> BIT_SET = new TypeAdapter() {
    public BitSet read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }

      BitSet bitset = new BitSet();
      in.beginArray();
      int i = 0;
      JsonToken tokenType = in.peek();
      while (tokenType != JsonToken.END_ARRAY)
      {
        boolean set;
        switch (TypeAdapters.32.$SwitchMap$com$google$gson$stream$JsonToken[tokenType.ordinal()]) {
        case 1:
          set = in.nextInt() != 0;
          break;
        case 2:
          set = in.nextBoolean();
          break;
        case 3:
          String stringValue = in.nextString();
          try {
            set = Integer.parseInt(stringValue) != 0;
          } catch (NumberFormatException e) {
            throw new JsonSyntaxException("Error: Expecting: bitset number value (1, 0), Found: " + stringValue);
          }

        default:
          throw new JsonSyntaxException("Invalid bitset value type: " + tokenType);
        }
        if (set) {
          bitset.set(i);
        }
        i++;
        tokenType = in.peek();
      }
      in.endArray();
      return bitset;
    }

    public void write(JsonWriter out, BitSet src) throws IOException {
      if (src == null) {
        out.nullValue();
        return;
      }

      out.beginArray();
      for (int i = 0; i < src.length(); i++) {
        int value = src.get(i) ? 1 : 0;
        out.value(value);
      }
      out.endArray();
    }
  };

  public static final TypeAdapterFactory BIT_SET_FACTORY = newFactory(BitSet.class, BIT_SET);

  public static final TypeAdapter<Boolean> BOOLEAN = new TypeAdapter()
  {
    public Boolean read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }if (in.peek() == JsonToken.STRING)
      {
        return Boolean.valueOf(Boolean.parseBoolean(in.nextString()));
      }
      return Boolean.valueOf(in.nextBoolean());
    }

    public void write(JsonWriter out, Boolean value) throws IOException {
      if (value == null) {
        out.nullValue();
        return;
      }
      out.value(value.booleanValue());
    }
  };

  public static final TypeAdapter<Boolean> BOOLEAN_AS_STRING = new TypeAdapter() {
    public Boolean read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      return Boolean.valueOf(in.nextString());
    }

    public void write(JsonWriter out, Boolean value) throws IOException {
      out.value(value == null ? "null" : value.toString());
    }
  };

  public static final TypeAdapterFactory BOOLEAN_FACTORY = newFactory(Boolean.TYPE, Boolean.class, BOOLEAN);

  public static final TypeAdapter<Number> BYTE = new TypeAdapter()
  {
    public Number read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      try {
        int intValue = in.nextInt();
        return Byte.valueOf((byte)intValue);
      } catch (NumberFormatException e) {
        throw new JsonSyntaxException(e);
      }
    }

    public void write(JsonWriter out, Number value) throws IOException {
      out.value(value);
    }
  };

  public static final TypeAdapterFactory BYTE_FACTORY = newFactory(Byte.TYPE, Byte.class, BYTE);

  public static final TypeAdapter<Number> SHORT = new TypeAdapter()
  {
    public Number read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      try {
        return Short.valueOf((short)in.nextInt());
      } catch (NumberFormatException e) {
        throw new JsonSyntaxException(e);
      }
    }

    public void write(JsonWriter out, Number value) throws IOException {
      out.value(value);
    }
  };

  public static final TypeAdapterFactory SHORT_FACTORY = newFactory(Short.TYPE, Short.class, SHORT);

  public static final TypeAdapter<Number> INTEGER = new TypeAdapter()
  {
    public Number read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      try {
        return Integer.valueOf(in.nextInt());
      } catch (NumberFormatException e) {
        throw new JsonSyntaxException(e);
      }
    }

    public void write(JsonWriter out, Number value) throws IOException {
      out.value(value);
    }
  };

  public static final TypeAdapterFactory INTEGER_FACTORY = newFactory(Integer.TYPE, Integer.class, INTEGER);

  public static final TypeAdapter<Number> LONG = new TypeAdapter()
  {
    public Number read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      try {
        return Long.valueOf(in.nextLong());
      } catch (NumberFormatException e) {
        throw new JsonSyntaxException(e);
      }
    }

    public void write(JsonWriter out, Number value) throws IOException {
      out.value(value);
    }
  };

  public static final TypeAdapter<Number> FLOAT = new TypeAdapter()
  {
    public Number read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      return Float.valueOf((float)in.nextDouble());
    }

    public void write(JsonWriter out, Number value) throws IOException {
      out.value(value);
    }
  };

  public static final TypeAdapter<Number> DOUBLE = new TypeAdapter()
  {
    public Number read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      return Double.valueOf(in.nextDouble());
    }

    public void write(JsonWriter out, Number value) throws IOException {
      out.value(value);
    }
  };

  public static final TypeAdapter<Number> NUMBER = new TypeAdapter()
  {
    public Number read(JsonReader in) throws IOException {
      JsonToken jsonToken = in.peek();
      switch (TypeAdapters.32.$SwitchMap$com$google$gson$stream$JsonToken[jsonToken.ordinal()]) {
      case 4:
        in.nextNull();
        return null;
      case 1:
        return new LazilyParsedNumber(in.nextString());
      }
      throw new JsonSyntaxException("Expecting number, got: " + jsonToken);
    }

    public void write(JsonWriter out, Number value) throws IOException
    {
      out.value(value);
    }
  };

  public static final TypeAdapterFactory NUMBER_FACTORY = newFactory(Number.class, NUMBER);

  public static final TypeAdapter<Character> CHARACTER = new TypeAdapter()
  {
    public Character read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      String str = in.nextString();
      if (str.length() != 1) {
        throw new JsonSyntaxException("Expecting character, got: " + str);
      }
      return Character.valueOf(str.charAt(0));
    }

    public void write(JsonWriter out, Character value) throws IOException {
      out.value(value == null ? null : String.valueOf(value));
    }
  };

  public static final TypeAdapterFactory CHARACTER_FACTORY = newFactory(Character.TYPE, Character.class, CHARACTER);

  public static final TypeAdapter<String> STRING = new TypeAdapter()
  {
    public String read(JsonReader in) throws IOException {
      JsonToken peek = in.peek();
      if (peek == JsonToken.NULL) {
        in.nextNull();
        return null;
      }

      if (peek == JsonToken.BOOLEAN) {
        return Boolean.toString(in.nextBoolean());
      }
      return in.nextString();
    }

    public void write(JsonWriter out, String value) throws IOException {
      out.value(value);
    }
  };

  public static final TypeAdapter<BigDecimal> BIG_DECIMAL = new TypeAdapter() {
    public BigDecimal read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      try {
        return new BigDecimal(in.nextString());
      } catch (NumberFormatException e) {
        throw new JsonSyntaxException(e);
      }
    }

    public void write(JsonWriter out, BigDecimal value) throws IOException {
      out.value(value);
    }
  };

  public static final TypeAdapter<BigInteger> BIG_INTEGER = new TypeAdapter() {
    public BigInteger read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      try {
        return new BigInteger(in.nextString());
      } catch (NumberFormatException e) {
        throw new JsonSyntaxException(e);
      }
    }

    public void write(JsonWriter out, BigInteger value) throws IOException {
      out.value(value);
    }
  };

  public static final TypeAdapterFactory STRING_FACTORY = newFactory(String.class, STRING);

  public static final TypeAdapter<StringBuilder> STRING_BUILDER = new TypeAdapter()
  {
    public StringBuilder read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      return new StringBuilder(in.nextString());
    }

    public void write(JsonWriter out, StringBuilder value) throws IOException {
      out.value(value == null ? null : value.toString());
    }
  };

  public static final TypeAdapterFactory STRING_BUILDER_FACTORY = newFactory(StringBuilder.class, STRING_BUILDER);

  public static final TypeAdapter<StringBuffer> STRING_BUFFER = new TypeAdapter()
  {
    public StringBuffer read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      return new StringBuffer(in.nextString());
    }

    public void write(JsonWriter out, StringBuffer value) throws IOException {
      out.value(value == null ? null : value.toString());
    }
  };

  public static final TypeAdapterFactory STRING_BUFFER_FACTORY = newFactory(StringBuffer.class, STRING_BUFFER);

  public static final TypeAdapter<URL> URL = new TypeAdapter()
  {
    public URL read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      String nextString = in.nextString();
      return "null".equals(nextString) ? null : new URL(nextString);
    }

    public void write(JsonWriter out, URL value) throws IOException {
      out.value(value == null ? null : value.toExternalForm());
    }
  };

  public static final TypeAdapterFactory URL_FACTORY = newFactory(URL.class, URL);

  public static final TypeAdapter<URI> URI = new TypeAdapter()
  {
    public URI read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      try {
        String nextString = in.nextString();
        return "null".equals(nextString) ? null : new URI(nextString);
      } catch (URISyntaxException e) {
        throw new JsonIOException(e);
      }
    }

    public void write(JsonWriter out, URI value) throws IOException {
      out.value(value == null ? null : value.toASCIIString());
    }
  };

  public static final TypeAdapterFactory URI_FACTORY = newFactory(URI.class, URI);

  public static final TypeAdapter<InetAddress> INET_ADDRESS = new TypeAdapter()
  {
    public InetAddress read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }

      return InetAddress.getByName(in.nextString());
    }

    public void write(JsonWriter out, InetAddress value) throws IOException {
      out.value(value == null ? null : value.getHostAddress());
    }
  };

  public static final TypeAdapterFactory INET_ADDRESS_FACTORY = newTypeHierarchyFactory(InetAddress.class, INET_ADDRESS);

  public static final TypeAdapter<UUID> UUID = new TypeAdapter()
  {
    public UUID read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      return UUID.fromString(in.nextString());
    }

    public void write(JsonWriter out, UUID value) throws IOException {
      out.value(value == null ? null : value.toString());
    }
  };

  public static final TypeAdapterFactory UUID_FACTORY = newFactory(UUID.class, UUID);

  public static final TypeAdapterFactory TIMESTAMP_FACTORY = new TypeAdapterFactory()
  {
    public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
      if (typeToken.getRawType() != Timestamp.class) {
        return null;
      }

      final TypeAdapter dateTypeAdapter = gson.getAdapter(Date.class);
      return new TypeAdapter() {
        public Timestamp read(JsonReader in) throws IOException {
          Date date = (Date)dateTypeAdapter.read(in);
          return date != null ? new Timestamp(date.getTime()) : null;
        }

        public void write(JsonWriter out, Timestamp value) throws IOException {
          dateTypeAdapter.write(out, value);
        }
      };
    }
  };

  public static final TypeAdapter<Calendar> CALENDAR = new TypeAdapter()
  {
    public Calendar read(JsonReader in)
      throws IOException
    {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      in.beginObject();
      int year = 0;
      int month = 0;
      int dayOfMonth = 0;
      int hourOfDay = 0;
      int minute = 0;
      int second = 0;
      while (in.peek() != JsonToken.END_OBJECT) {
        String name = in.nextName();
        int value = in.nextInt();
        if ("year".equals(name))
          year = value;
        else if ("month".equals(name))
          month = value;
        else if ("dayOfMonth".equals(name))
          dayOfMonth = value;
        else if ("hourOfDay".equals(name))
          hourOfDay = value;
        else if ("minute".equals(name))
          minute = value;
        else if ("second".equals(name)) {
          second = value;
        }
      }
      in.endObject();
      return new GregorianCalendar(year, month, dayOfMonth, hourOfDay, minute, second);
    }

    public void write(JsonWriter out, Calendar value) throws IOException
    {
      if (value == null) {
        out.nullValue();
        return;
      }
      out.beginObject();
      out.name("year");
      out.value(value.get(1));
      out.name("month");
      out.value(value.get(2));
      out.name("dayOfMonth");
      out.value(value.get(5));
      out.name("hourOfDay");
      out.value(value.get(11));
      out.name("minute");
      out.value(value.get(12));
      out.name("second");
      out.value(value.get(13));
      out.endObject();
    }
  };

  public static final TypeAdapterFactory CALENDAR_FACTORY = newFactoryForMultipleTypes(Calendar.class, GregorianCalendar.class, CALENDAR);

  public static final TypeAdapter<Locale> LOCALE = new TypeAdapter()
  {
    public Locale read(JsonReader in) throws IOException {
      if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      String locale = in.nextString();
      StringTokenizer tokenizer = new StringTokenizer(locale, "_");
      String language = null;
      String country = null;
      String variant = null;
      if (tokenizer.hasMoreElements()) {
        language = tokenizer.nextToken();
      }
      if (tokenizer.hasMoreElements()) {
        country = tokenizer.nextToken();
      }
      if (tokenizer.hasMoreElements()) {
        variant = tokenizer.nextToken();
      }
      if ((country == null) && (variant == null))
        return new Locale(language);
      if (variant == null) {
        return new Locale(language, country);
      }
      return new Locale(language, country, variant);
    }

    public void write(JsonWriter out, Locale value) throws IOException
    {
      out.value(value == null ? null : value.toString());
    }
  };

  public static final TypeAdapterFactory LOCALE_FACTORY = newFactory(Locale.class, LOCALE);

  public static final TypeAdapter<JsonElement> JSON_ELEMENT = new TypeAdapter() {
    public JsonElement read(JsonReader in) throws IOException {
      switch (TypeAdapters.32.$SwitchMap$com$google$gson$stream$JsonToken[in.peek().ordinal()]) {
      case 3:
        return new JsonPrimitive(in.nextString());
      case 1:
        String number = in.nextString();
        return new JsonPrimitive(new LazilyParsedNumber(number));
      case 2:
        return new JsonPrimitive(Boolean.valueOf(in.nextBoolean()));
      case 4:
        in.nextNull();
        return JsonNull.INSTANCE;
      case 5:
        JsonArray array = new JsonArray();
        in.beginArray();
        while (in.hasNext()) {
          array.add(read(in));
        }
        in.endArray();
        return array;
      case 6:
        JsonObject object = new JsonObject();
        in.beginObject();
        while (in.hasNext()) {
          object.add(in.nextName(), read(in));
        }
        in.endObject();
        return object;
      case 7:
      case 8:
      case 9:
      case 10:
      }
      throw new IllegalArgumentException();
    }

    public void write(JsonWriter out, JsonElement value) throws IOException
    {
      if ((value == null) || (value.isJsonNull())) {
        out.nullValue();
      } else if (value.isJsonPrimitive()) {
        JsonPrimitive primitive = value.getAsJsonPrimitive();
        if (primitive.isNumber())
          out.value(primitive.getAsNumber());
        else if (primitive.isBoolean())
          out.value(primitive.getAsBoolean());
        else {
          out.value(primitive.getAsString());
        }
      }
      else if (value.isJsonArray()) {
        out.beginArray();
        for (JsonElement e : value.getAsJsonArray()) {
          write(out, e);
        }
        out.endArray();
      }
      else if (value.isJsonObject()) {
        out.beginObject();
        for (Map.Entry e : value.getAsJsonObject().entrySet()) {
          out.name((String)e.getKey());
          write(out, (JsonElement)e.getValue());
        }
        out.endObject();
      }
      else {
        throw new IllegalArgumentException("Couldn't write " + value.getClass());
      }
    }
  };

  public static final TypeAdapterFactory JSON_ELEMENT_FACTORY = newFactory(JsonElement.class, JSON_ELEMENT);

  public static final TypeAdapterFactory ENUM_FACTORY = newEnumTypeHierarchyFactory();

  public static TypeAdapterFactory newEnumTypeHierarchyFactory() {
    return new TypeAdapterFactory()
    {
      public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
        Class rawType = typeToken.getRawType();
        if ((!Enum.class.isAssignableFrom(rawType)) || (rawType == Enum.class)) {
          return null;
        }
        if (!rawType.isEnum()) {
          rawType = rawType.getSuperclass();
        }
        return new TypeAdapters.EnumTypeAdapter(rawType);
      }
    };
  }

  public static <TT> TypeAdapterFactory newFactory(TypeToken<TT> type, final TypeAdapter<TT> typeAdapter)
  {
    return new TypeAdapterFactory()
    {
      public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
        return typeToken.equals(this.val$type) ? typeAdapter : null;
      }
    };
  }

  public static <TT> TypeAdapterFactory newFactory(Class<TT> type, final TypeAdapter<TT> typeAdapter)
  {
    return new TypeAdapterFactory()
    {
      public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
        return typeToken.getRawType() == this.val$type ? typeAdapter : null;
      }
      public String toString() {
        return "Factory[type=" + this.val$type.getName() + ",adapter=" + typeAdapter + "]";
      }
    };
  }

  public static <TT> TypeAdapterFactory newFactory(Class<TT> unboxed, final Class<TT> boxed, final TypeAdapter<? super TT> typeAdapter)
  {
    return new TypeAdapterFactory()
    {
      public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
        Class rawType = typeToken.getRawType();
        return (rawType == this.val$unboxed) || (rawType == boxed) ? typeAdapter : null;
      }
      public String toString() {
        return "Factory[type=" + boxed.getName() + "+" + this.val$unboxed.getName() + ",adapter=" + typeAdapter + "]";
      }
    };
  }

  public static <TT> TypeAdapterFactory newFactoryForMultipleTypes(Class<TT> base, final Class<? extends TT> sub, final TypeAdapter<? super TT> typeAdapter)
  {
    return new TypeAdapterFactory()
    {
      public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
        Class rawType = typeToken.getRawType();
        return (rawType == this.val$base) || (rawType == sub) ? typeAdapter : null;
      }
      public String toString() {
        return "Factory[type=" + this.val$base.getName() + "+" + sub.getName() + ",adapter=" + typeAdapter + "]";
      }
    };
  }

  public static <TT> TypeAdapterFactory newTypeHierarchyFactory(Class<TT> clazz, final TypeAdapter<TT> typeAdapter)
  {
    return new TypeAdapterFactory()
    {
      public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
        return this.val$clazz.isAssignableFrom(typeToken.getRawType()) ? typeAdapter : null;
      }
      public String toString() {
        return "Factory[typeHierarchy=" + this.val$clazz.getName() + ",adapter=" + typeAdapter + "]";
      }
    };
  }

  private static final class EnumTypeAdapter<T extends Enum<T>> extends TypeAdapter<T>
  {
    private final Map<String, T> nameToConstant = new HashMap();
    private final Map<T, String> constantToName = new HashMap();

    public EnumTypeAdapter(Class<T> classOfT) {
      try {
        for (Enum constant : (Enum[])classOfT.getEnumConstants()) {
          String name = constant.name();
          SerializedName annotation = (SerializedName)classOfT.getField(name).getAnnotation(SerializedName.class);
          if (annotation != null) {
            name = annotation.value();
          }
          this.nameToConstant.put(name, constant);
          this.constantToName.put(constant, name);
        }
      } catch (NoSuchFieldException e) {
        throw new AssertionError();
      }
    }

    public T read(JsonReader in) throws IOException { if (in.peek() == JsonToken.NULL) {
        in.nextNull();
        return null;
      }
      return (Enum)this.nameToConstant.get(in.nextString()); }

    public void write(JsonWriter out, T value) throws IOException
    {
      out.value(value == null ? null : (String)this.constantToName.get(value));
    }
  }
}