package com.fasterxml.jackson.databind.ser.std;

import java.io.IOException;
import java.lang.reflect.Type;
import java.util.HashMap;

import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.core.type.WritableTypeId;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.annotation.JacksonStdImpl;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatVisitorWrapper;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatTypes;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.fasterxml.jackson.databind.ser.ContainerSerializer;
import com.fasterxml.jackson.databind.type.TypeFactory;

Dummy container class to group standard homogenous array serializer implementations (primitive arrays and String array).
/** * Dummy container class to group standard homogenous array serializer implementations * (primitive arrays and String array). */
@SuppressWarnings("serial") public class StdArraySerializers { protected final static HashMap<String, JsonSerializer<?>> _arraySerializers = new HashMap<String, JsonSerializer<?>>(); static { // Arrays of various types (including common object types) _arraySerializers.put(boolean[].class.getName(), new StdArraySerializers.BooleanArraySerializer()); _arraySerializers.put(byte[].class.getName(), new ByteArraySerializer()); _arraySerializers.put(char[].class.getName(), new StdArraySerializers.CharArraySerializer()); _arraySerializers.put(short[].class.getName(), new StdArraySerializers.ShortArraySerializer()); _arraySerializers.put(int[].class.getName(), new StdArraySerializers.IntArraySerializer()); _arraySerializers.put(long[].class.getName(), new StdArraySerializers.LongArraySerializer()); _arraySerializers.put(float[].class.getName(), new StdArraySerializers.FloatArraySerializer()); _arraySerializers.put(double[].class.getName(), new StdArraySerializers.DoubleArraySerializer()); } protected StdArraySerializers() { }
Accessor for checking to see if there is a standard serializer for given primitive value type.
/** * Accessor for checking to see if there is a standard serializer for * given primitive value type. */
public static JsonSerializer<?> findStandardImpl(Class<?> cls) { return _arraySerializers.get(cls.getName()); } /* **************************************************************** /* Intermediate base classes **************************************************************** */
Intermediate base class used for cases where we may add type information (excludes boolean/int/double arrays).
/** * Intermediate base class used for cases where we may add * type information (excludes boolean/int/double arrays). */
protected abstract static class TypedPrimitiveArraySerializer<T> extends ArraySerializerBase<T> { protected TypedPrimitiveArraySerializer(Class<T> cls) { super(cls); } protected TypedPrimitiveArraySerializer(TypedPrimitiveArraySerializer<T> src, BeanProperty prop, Boolean unwrapSingle) { super(src, prop, unwrapSingle); } // 01-Dec-2016, tatu: Only now realized that due strong typing of Java arrays, // we cannot really ever have value type serializers @Override public final ContainerSerializer<?> _withValueTypeSerializer(TypeSerializer vts) { // throw exception or just do nothing? return this; } } /* /**************************************************************** /* Concrete serializers, arrays /**************************************************************** */ @JacksonStdImpl public static class BooleanArraySerializer extends ArraySerializerBase<boolean[]> { // as above, assuming no one re-defines primitive/wrapper types @SuppressWarnings("deprecation") private final static JavaType VALUE_TYPE = TypeFactory.defaultInstance().uncheckedSimpleType(Boolean.class); public BooleanArraySerializer() { super(boolean[].class); } protected BooleanArraySerializer(BooleanArraySerializer src, BeanProperty prop, Boolean unwrapSingle) { super(src, prop, unwrapSingle); } @Override public JsonSerializer<?> _withResolved(BeanProperty prop, Boolean unwrapSingle) { return new BooleanArraySerializer(this, prop, unwrapSingle); }
Booleans never add type info; hence, even if type serializer is suggested, we'll ignore it...
/** * Booleans never add type info; hence, even if type serializer is suggested, * we'll ignore it... */
@Override public ContainerSerializer<?> _withValueTypeSerializer(TypeSerializer vts) { return this; } @Override public JavaType getContentType() { return VALUE_TYPE; } @Override public JsonSerializer<?> getContentSerializer() { // 14-Jan-2012, tatu: We could refer to an actual serializer if absolutely necessary return null; } @Override public boolean isEmpty(SerializerProvider prov, boolean[] value) { return value.length == 0; } @Override public boolean hasSingleElement(boolean[] value) { return (value.length == 1); } @Override public final void serialize(boolean[] value, JsonGenerator g, SerializerProvider provider) throws IOException { final int len = value.length; if ((len == 1) && _shouldUnwrapSingle(provider)) { serializeContents(value, g, provider); return; } g.writeStartArray(value, len); serializeContents(value, g, provider); g.writeEndArray(); } @Override public void serializeContents(boolean[] value, JsonGenerator g, SerializerProvider provider) throws IOException { for (int i = 0, len = value.length; i < len; ++i) { g.writeBoolean(value[i]); } } @Override public JsonNode getSchema(SerializerProvider provider, Type typeHint) { ObjectNode o = createSchemaNode("array", true); o.set("items", createSchemaNode("boolean")); return o; } @Override public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException { visitArrayFormat(visitor, typeHint, JsonFormatTypes.BOOLEAN); } } @JacksonStdImpl public static class ShortArraySerializer extends TypedPrimitiveArraySerializer<short[]> { // as above, assuming no one re-defines primitive/wrapper types @SuppressWarnings("deprecation") private final static JavaType VALUE_TYPE = TypeFactory.defaultInstance().uncheckedSimpleType(Short.TYPE); public ShortArraySerializer() { super(short[].class); } public ShortArraySerializer(ShortArraySerializer src, BeanProperty prop, Boolean unwrapSingle) { super(src, prop, unwrapSingle); } @Override public JsonSerializer<?> _withResolved(BeanProperty prop,Boolean unwrapSingle) { return new ShortArraySerializer(this, prop, unwrapSingle); } @Override public JavaType getContentType() { return VALUE_TYPE; } @Override public JsonSerializer<?> getContentSerializer() { // 14-Jan-2012, tatu: We could refer to an actual serializer if absolutely necessary return null; } @Override public boolean isEmpty(SerializerProvider prov, short[] value) { return value.length == 0; } @Override public boolean hasSingleElement(short[] value) { return (value.length == 1); } @Override public final void serialize(short[] value, JsonGenerator g, SerializerProvider provider) throws IOException { final int len = value.length; if ((len == 1) && _shouldUnwrapSingle(provider)) { serializeContents(value, g, provider); return; } g.writeStartArray(value, len); serializeContents(value, g, provider); g.writeEndArray(); } @SuppressWarnings("cast") @Override public void serializeContents(short[] value, JsonGenerator g, SerializerProvider provider) throws IOException { for (int i = 0, len = value.length; i < len; ++i) { g.writeNumber((int)value[i]); } } @Override public JsonNode getSchema(SerializerProvider provider, Type typeHint) { //no "short" type defined by json ObjectNode o = createSchemaNode("array", true); return o.set("items", createSchemaNode("integer")); } @Override public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException { visitArrayFormat(visitor, typeHint, JsonFormatTypes.INTEGER); } }
Character arrays are different from other integral number arrays in that they are most likely to be textual data, and should be written as Strings, not arrays of entries.

NOTE: since it is NOT serialized as an array, cannot use AsArraySerializer as base

/** * Character arrays are different from other integral number arrays in that * they are most likely to be textual data, and should be written as * Strings, not arrays of entries. *<p> * NOTE: since it is NOT serialized as an array, cannot use AsArraySerializer as base */
@JacksonStdImpl public static class CharArraySerializer extends StdSerializer<char[]> { public CharArraySerializer() { super(char[].class); } @Override public boolean isEmpty(SerializerProvider prov, char[] value) { return value.length == 0; } @Override public void serialize(char[] value, JsonGenerator g, SerializerProvider provider) throws IOException { // [JACKSON-289] allows serializing as 'sparse' char array too: if (provider.isEnabled(SerializationFeature.WRITE_CHAR_ARRAYS_AS_JSON_ARRAYS)) { g.writeStartArray(value, value.length); _writeArrayContents(g, value); g.writeEndArray(); } else { g.writeString(value, 0, value.length); } } @Override public void serializeWithType(char[] value, JsonGenerator g, SerializerProvider provider, TypeSerializer typeSer) throws IOException { // [JACKSON-289] allows serializing as 'sparse' char array too: final boolean asArray = provider.isEnabled(SerializationFeature.WRITE_CHAR_ARRAYS_AS_JSON_ARRAYS); WritableTypeId typeIdDef; if (asArray) { typeIdDef = typeSer.writeTypePrefix(g, typeSer.typeId(value, JsonToken.START_ARRAY)); _writeArrayContents(g, value); } else { // default is to write as simple String typeIdDef = typeSer.writeTypePrefix(g, typeSer.typeId(value, JsonToken.VALUE_STRING)); g.writeString(value, 0, value.length); } typeSer.writeTypeSuffix(g, typeIdDef); } private final void _writeArrayContents(JsonGenerator g, char[] value) throws IOException { for (int i = 0, len = value.length; i < len; ++i) { g.writeString(value, i, 1); } } @Override public JsonNode getSchema(SerializerProvider provider, Type typeHint) { ObjectNode o = createSchemaNode("array", true); ObjectNode itemSchema = createSchemaNode("string"); itemSchema.put("type", "string"); return o.set("items", itemSchema); } @Override public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException { visitArrayFormat(visitor, typeHint, JsonFormatTypes.STRING); } } @JacksonStdImpl public static class IntArraySerializer extends ArraySerializerBase<int[]> { // as above, assuming no one re-defines primitive/wrapper types @SuppressWarnings("deprecation") private final static JavaType VALUE_TYPE = TypeFactory.defaultInstance().uncheckedSimpleType(Integer.TYPE); public IntArraySerializer() { super(int[].class); }
Since:2.6
/** * @since 2.6 */
protected IntArraySerializer(IntArraySerializer src, BeanProperty prop, Boolean unwrapSingle) { super(src, prop, unwrapSingle); } @Override public JsonSerializer<?> _withResolved(BeanProperty prop, Boolean unwrapSingle) { return new IntArraySerializer(this, prop, unwrapSingle); }
Ints never add type info; hence, even if type serializer is suggested, we'll ignore it...
/** * Ints never add type info; hence, even if type serializer is suggested, * we'll ignore it... */
@Override public ContainerSerializer<?> _withValueTypeSerializer(TypeSerializer vts) { return this; } @Override public JavaType getContentType() { return VALUE_TYPE; } @Override public JsonSerializer<?> getContentSerializer() { // 14-Jan-2012, tatu: We could refer to an actual serializer if absolutely necessary return null; } @Override public boolean isEmpty(SerializerProvider prov, int[] value) { return value.length == 0; } @Override public boolean hasSingleElement(int[] value) { return (value.length == 1); } @Override public final void serialize(int[] value, JsonGenerator g, SerializerProvider provider) throws IOException { final int len = value.length; if ((len == 1) && _shouldUnwrapSingle(provider)) { serializeContents(value, g, provider); return; } // 11-May-2016, tatu: As per [core#277] we have efficient `writeArray(...)` available g.writeArray(value, 0, value.length); } @Override public void serializeContents(int[] value, JsonGenerator g, SerializerProvider provider) throws IOException { for (int i = 0, len = value.length; i < len; ++i) { g.writeNumber(value[i]); } } @Override public JsonNode getSchema(SerializerProvider provider, Type typeHint) { return createSchemaNode("array", true).set("items", createSchemaNode("integer")); } @Override public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException { visitArrayFormat(visitor, typeHint, JsonFormatTypes.INTEGER); } } @JacksonStdImpl public static class LongArraySerializer extends TypedPrimitiveArraySerializer<long[]> { // as above, assuming no one re-defines primitive/wrapper types @SuppressWarnings("deprecation") private final static JavaType VALUE_TYPE = TypeFactory.defaultInstance().uncheckedSimpleType(Long.TYPE); public LongArraySerializer() { super(long[].class); } public LongArraySerializer(LongArraySerializer src, BeanProperty prop, Boolean unwrapSingle) { super(src, prop, unwrapSingle); } @Override public JsonSerializer<?> _withResolved(BeanProperty prop,Boolean unwrapSingle) { return new LongArraySerializer(this, prop, unwrapSingle); } @Override public JavaType getContentType() { return VALUE_TYPE; } @Override public JsonSerializer<?> getContentSerializer() { // 14-Jan-2012, tatu: We could refer to an actual serializer if absolutely necessary return null; } @Override public boolean isEmpty(SerializerProvider prov, long[] value) { return value.length == 0; } @Override public boolean hasSingleElement(long[] value) { return (value.length == 1); } @Override public final void serialize(long[] value, JsonGenerator g, SerializerProvider provider) throws IOException { final int len = value.length; if ((len == 1) && _shouldUnwrapSingle(provider)) { serializeContents(value, g, provider); return; } // 11-May-2016, tatu: As per [core#277] we have efficient `writeArray(...)` available g.writeArray(value, 0, value.length); } @Override public void serializeContents(long[] value, JsonGenerator g, SerializerProvider provider) throws IOException { for (int i = 0, len = value.length; i < len; ++i) { g.writeNumber(value[i]); } } @Override public JsonNode getSchema(SerializerProvider provider, Type typeHint) { return createSchemaNode("array", true) .set("items", createSchemaNode("number", true)); } @Override public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException { visitArrayFormat(visitor, typeHint, JsonFormatTypes.NUMBER); } } @JacksonStdImpl public static class FloatArraySerializer extends TypedPrimitiveArraySerializer<float[]> { // as above, assuming no one re-defines primitive/wrapper types @SuppressWarnings("deprecation") private final static JavaType VALUE_TYPE = TypeFactory.defaultInstance().uncheckedSimpleType(Float.TYPE); public FloatArraySerializer() { super(float[].class); } public FloatArraySerializer(FloatArraySerializer src, BeanProperty prop, Boolean unwrapSingle) { super(src, prop, unwrapSingle); } @Override public JsonSerializer<?> _withResolved(BeanProperty prop,Boolean unwrapSingle) { return new FloatArraySerializer(this, prop, unwrapSingle); } @Override public JavaType getContentType() { return VALUE_TYPE; } @Override public JsonSerializer<?> getContentSerializer() { // 14-Jan-2012, tatu: We could refer to an actual serializer if absolutely necessary return null; } @Override public boolean isEmpty(SerializerProvider prov, float[] value) { return value.length == 0; } @Override public boolean hasSingleElement(float[] value) { return (value.length == 1); } @Override public final void serialize(float[] value, JsonGenerator g, SerializerProvider provider) throws IOException { final int len = value.length; if ((len == 1) && _shouldUnwrapSingle(provider)) { serializeContents(value, g, provider); return; } g.writeStartArray(value, len); serializeContents(value, g, provider); g.writeEndArray(); } @Override public void serializeContents(float[] value, JsonGenerator g, SerializerProvider provider) throws IOException { for (int i = 0, len = value.length; i < len; ++i) { g.writeNumber(value[i]); } } @Override public JsonNode getSchema(SerializerProvider provider, Type typeHint) { return createSchemaNode("array", true).set("items", createSchemaNode("number")); } @Override public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException { visitArrayFormat(visitor, typeHint, JsonFormatTypes.NUMBER); } } @JacksonStdImpl public static class DoubleArraySerializer extends ArraySerializerBase<double[]> { // as above, assuming no one re-defines primitive/wrapper types @SuppressWarnings("deprecation") private final static JavaType VALUE_TYPE = TypeFactory.defaultInstance().uncheckedSimpleType(Double.TYPE); public DoubleArraySerializer() { super(double[].class); }
Since:2.6
/** * @since 2.6 */
protected DoubleArraySerializer(DoubleArraySerializer src, BeanProperty prop, Boolean unwrapSingle) { super(src, prop, unwrapSingle); } @Override public JsonSerializer<?> _withResolved(BeanProperty prop, Boolean unwrapSingle) { return new DoubleArraySerializer(this, prop, unwrapSingle); }
Doubles never add type info; hence, even if type serializer is suggested, we'll ignore it...
/** * Doubles never add type info; hence, even if type serializer is suggested, * we'll ignore it... */
@Override public ContainerSerializer<?> _withValueTypeSerializer(TypeSerializer vts) { return this; } @Override public JavaType getContentType() { return VALUE_TYPE; } @Override public JsonSerializer<?> getContentSerializer() { // 14-Jan-2012, tatu: We could refer to an actual serializer if absolutely necessary return null; } @Override public boolean isEmpty(SerializerProvider prov, double[] value) { return value.length == 0; } @Override public boolean hasSingleElement(double[] value) { return (value.length == 1); } @Override public final void serialize(double[] value, JsonGenerator g, SerializerProvider provider) throws IOException { final int len = value.length; if ((len == 1) && _shouldUnwrapSingle(provider)) { serializeContents(value, g, provider); return; } // 11-May-2016, tatu: As per [core#277] we have efficient `writeArray(...)` available g.writeArray(value, 0, value.length); } @Override public void serializeContents(double[] value, JsonGenerator g, SerializerProvider provider) throws IOException { for (int i = 0, len = value.length; i < len; ++i) { g.writeNumber(value[i]); } } @Override public JsonNode getSchema(SerializerProvider provider, Type typeHint) { return createSchemaNode("array", true).set("items", createSchemaNode("number")); } @Override public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint) throws JsonMappingException { visitArrayFormat(visitor, typeHint, JsonFormatTypes.NUMBER); } } }