com.fasterxml.jackson.databind.ser.std.StdArraySerializers Maven / Gradle / Ivy
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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.databind.*;
import com.fasterxml.jackson.databind.annotation.JacksonStdImpl;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonArrayFormatVisitor;
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).
*/
public class StdArraySerializers
{
protected final static HashMap> _arraySerializers =
new HashMap>();
static {
// Arrays of various types (including common object types)
_arraySerializers.put(boolean[].class.getName(), new StdArraySerializers.BooleanArraySerializer());
_arraySerializers.put(byte[].class.getName(), new StdArraySerializers.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.
*/
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).
*/
protected abstract static class TypedPrimitiveArraySerializer
extends ArraySerializerBase
{
/**
* Type serializer to use for values, if any.
*/
protected final TypeSerializer _valueTypeSerializer;
protected TypedPrimitiveArraySerializer(Class cls) {
super(cls);
_valueTypeSerializer = null;
}
protected TypedPrimitiveArraySerializer(TypedPrimitiveArraySerializer src,
BeanProperty prop, TypeSerializer vts) {
super(src, prop);
_valueTypeSerializer = vts;
}
}
/*
/****************************************************************
/* Concrete serializers, arrays
/****************************************************************
*/
@JacksonStdImpl
public final static class BooleanArraySerializer
extends ArraySerializerBase
{
// as above, assuming no one re-defines primitive/wrapper types
private final static JavaType VALUE_TYPE = TypeFactory.defaultInstance().uncheckedSimpleType(Boolean.class);
public BooleanArraySerializer() { super(boolean[].class, null); }
/**
* 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(boolean[] value) {
return (value == null) || (value.length == 0);
}
@Override
public boolean hasSingleElement(boolean[] value) {
return (value.length == 1);
}
@Override
public void serializeContents(boolean[] value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
for (int i = 0, len = value.length; i < len; ++i) {
jgen.writeBoolean(value[i]);
}
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
ObjectNode o = createSchemaNode("array", true);
o.put("items", createSchemaNode("boolean"));
return o;
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
if (visitor != null) {
JsonArrayFormatVisitor v2 = visitor.expectArrayFormat(typeHint);
if (v2 != null) {
v2.itemsFormat(JsonFormatTypes.BOOLEAN);
}
}
}
}
/**
* Unlike other integral number array serializers, we do not just print out byte values
* as numbers. Instead, we assume that it would make more sense to output content
* as base64 encoded bytes (using default base64 encoding).
*
* NOTE: since it is NOT serialized as an array, can not use AsArraySerializer as base
*/
@JacksonStdImpl
public final static class ByteArraySerializer
extends StdSerializer
{
public ByteArraySerializer() {
super(byte[].class);
}
@Override
public boolean isEmpty(byte[] value) {
return (value == null) || (value.length == 0);
}
@Override
public void serialize(byte[] value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
jgen.writeBinary(provider.getConfig().getBase64Variant(),
value, 0, value.length);
}
@Override
public void serializeWithType(byte[] value, JsonGenerator jgen, SerializerProvider provider,
TypeSerializer typeSer)
throws IOException, JsonGenerationException
{
typeSer.writeTypePrefixForScalar(value, jgen);
jgen.writeBinary(provider.getConfig().getBase64Variant(),
value, 0, value.length);
typeSer.writeTypeSuffixForScalar(value, jgen);
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
ObjectNode o = createSchemaNode("array", true);
ObjectNode itemSchema = createSchemaNode("string"); //binary values written as strings?
o.put("items", itemSchema);
return o;
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
if (visitor != null) {
JsonArrayFormatVisitor v2 = visitor.expectArrayFormat(typeHint);
if (v2 != null) {
v2.itemsFormat(JsonFormatTypes.STRING);
}
}
}
}
@JacksonStdImpl
public final static class ShortArraySerializer
extends TypedPrimitiveArraySerializer
{
// as above, assuming no one re-defines primitive/wrapper types
private final static JavaType VALUE_TYPE = TypeFactory.defaultInstance().uncheckedSimpleType(Short.TYPE);
public ShortArraySerializer() { super(short[].class); }
public ShortArraySerializer(ShortArraySerializer src, BeanProperty prop, TypeSerializer vts) {
super(src, prop, vts);
}
@Override
public ContainerSerializer _withValueTypeSerializer(TypeSerializer vts) {
return new ShortArraySerializer(this, _property, vts);
}
@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(short[] value) {
return (value == null) || (value.length == 0);
}
@Override
public boolean hasSingleElement(short[] value) {
return (value.length == 1);
}
@SuppressWarnings("cast")
@Override
public void serializeContents(short[] value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
if (_valueTypeSerializer != null) {
for (int i = 0, len = value.length; i < len; ++i) {
_valueTypeSerializer.writeTypePrefixForScalar(null, jgen, Short.TYPE);
jgen.writeNumber(value[i]);
_valueTypeSerializer.writeTypeSuffixForScalar(null, jgen);
}
return;
}
for (int i = 0, len = value.length; i < len; ++i) {
jgen.writeNumber((int)value[i]);
}
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
//no "short" type defined by json
ObjectNode o = createSchemaNode("array", true);
o.put("items", createSchemaNode("integer"));
return o;
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
if (visitor != null) {
JsonArrayFormatVisitor v2 = visitor.expectArrayFormat(typeHint);
if (v2 != null) {
v2.itemsFormat(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, can not use AsArraySerializer as base
*/
@JacksonStdImpl
public final static class CharArraySerializer
extends StdSerializer
{
public CharArraySerializer() { super(char[].class); }
@Override
public boolean isEmpty(char[] value) {
return (value == null) || (value.length == 0);
}
@Override
public void serialize(char[] value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
// [JACKSON-289] allows serializing as 'sparse' char array too:
if (provider.isEnabled(SerializationFeature.WRITE_CHAR_ARRAYS_AS_JSON_ARRAYS)) {
jgen.writeStartArray();
_writeArrayContents(jgen, value);
jgen.writeEndArray();
} else {
jgen.writeString(value, 0, value.length);
}
}
@Override
public void serializeWithType(char[] value, JsonGenerator jgen, SerializerProvider provider,
TypeSerializer typeSer)
throws IOException, JsonGenerationException
{
// [JACKSON-289] allows serializing as 'sparse' char array too:
if (provider.isEnabled(SerializationFeature.WRITE_CHAR_ARRAYS_AS_JSON_ARRAYS)) {
typeSer.writeTypePrefixForArray(value, jgen);
_writeArrayContents(jgen, value);
typeSer.writeTypeSuffixForArray(value, jgen);
} else { // default is to write as simple String
typeSer.writeTypePrefixForScalar(value, jgen);
jgen.writeString(value, 0, value.length);
typeSer.writeTypeSuffixForScalar(value, jgen);
}
}
private final void _writeArrayContents(JsonGenerator jgen, char[] value)
throws IOException, JsonGenerationException
{
for (int i = 0, len = value.length; i < len; ++i) {
jgen.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");
o.put("items", itemSchema);
return o;
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
if (visitor != null) {
JsonArrayFormatVisitor v2 = visitor.expectArrayFormat(typeHint);
if (v2 != null) {
v2.itemsFormat(JsonFormatTypes.STRING);
}
}
}
}
@JacksonStdImpl
public final static class IntArraySerializer
extends ArraySerializerBase
{
// as above, assuming no one re-defines primitive/wrapper types
private final static JavaType VALUE_TYPE = TypeFactory.defaultInstance().uncheckedSimpleType(Integer.TYPE);
public IntArraySerializer() { super(int[].class, null); }
/**
* 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(int[] value) {
return (value == null) || (value.length == 0);
}
@Override
public boolean hasSingleElement(int[] value) {
return (value.length == 1);
}
@Override
public void serializeContents(int[] value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
for (int i = 0, len = value.length; i < len; ++i) {
jgen.writeNumber(value[i]);
}
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
ObjectNode o = createSchemaNode("array", true);
o.put("items", createSchemaNode("integer"));
return o;
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
if (visitor != null) {
JsonArrayFormatVisitor v2 = visitor.expectArrayFormat(typeHint);
if (v2 != null) {
v2.itemsFormat(JsonFormatTypes.INTEGER);
}
}
}
}
@JacksonStdImpl
public final static class LongArraySerializer
extends TypedPrimitiveArraySerializer
{
// as above, assuming no one re-defines primitive/wrapper types
private final static JavaType VALUE_TYPE = TypeFactory.defaultInstance().uncheckedSimpleType(Long.TYPE);
public LongArraySerializer() { super(long[].class); }
public LongArraySerializer(LongArraySerializer src, BeanProperty prop,
TypeSerializer vts) {
super(src, prop, vts);
}
@Override
public ContainerSerializer _withValueTypeSerializer(TypeSerializer vts) {
return new LongArraySerializer(this, _property, vts);
}
@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(long[] value) {
return (value == null) || (value.length == 0);
}
@Override
public boolean hasSingleElement(long[] value) {
return (value.length == 1);
}
@Override
public void serializeContents(long[] value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
if (_valueTypeSerializer != null) {
for (int i = 0, len = value.length; i < len; ++i) {
_valueTypeSerializer.writeTypePrefixForScalar(null, jgen, Long.TYPE);
jgen.writeNumber(value[i]);
_valueTypeSerializer.writeTypeSuffixForScalar(null, jgen);
}
return;
}
for (int i = 0, len = value.length; i < len; ++i) {
jgen.writeNumber(value[i]);
}
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
ObjectNode o = createSchemaNode("array", true);
o.put("items", createSchemaNode("number", true));
return o;
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
if (visitor != null) {
JsonArrayFormatVisitor v2 = visitor.expectArrayFormat(typeHint);
if (v2 != null) {
v2.itemsFormat(JsonFormatTypes.NUMBER);
}
}
}
}
@JacksonStdImpl
public final static class FloatArraySerializer
extends TypedPrimitiveArraySerializer
{
// as above, assuming no one re-defines primitive/wrapper types
private final static JavaType VALUE_TYPE = TypeFactory.defaultInstance().uncheckedSimpleType(Float.TYPE);
public FloatArraySerializer() {
super(float[].class);
}
public FloatArraySerializer(FloatArraySerializer src, BeanProperty prop,
TypeSerializer vts) {
super(src, prop, vts);
}
@Override
public ContainerSerializer _withValueTypeSerializer(TypeSerializer vts) {
return new FloatArraySerializer(this, _property, vts);
}
@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(float[] value) {
return (value == null) || (value.length == 0);
}
@Override
public boolean hasSingleElement(float[] value) {
return (value.length == 1);
}
@Override
public void serializeContents(float[] value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
if (_valueTypeSerializer != null) {
for (int i = 0, len = value.length; i < len; ++i) {
_valueTypeSerializer.writeTypePrefixForScalar(null, jgen, Float.TYPE);
jgen.writeNumber(value[i]);
_valueTypeSerializer.writeTypeSuffixForScalar(null, jgen);
}
return;
}
for (int i = 0, len = value.length; i < len; ++i) {
jgen.writeNumber(value[i]);
}
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
ObjectNode o = createSchemaNode("array", true);
o.put("items", createSchemaNode("number"));
return o;
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
if (visitor != null) {
JsonArrayFormatVisitor v2 = visitor.expectArrayFormat(typeHint);
if (v2 != null) {
v2.itemsFormat(JsonFormatTypes.NUMBER);
}
}
}
}
@JacksonStdImpl
public final static class DoubleArraySerializer
extends ArraySerializerBase
{
// as above, assuming no one re-defines primitive/wrapper types
private final static JavaType VALUE_TYPE = TypeFactory.defaultInstance().uncheckedSimpleType(Double.TYPE);
public DoubleArraySerializer() { super(double[].class, null); }
/**
* 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(double[] value) {
return (value == null) || (value.length == 0);
}
@Override
public boolean hasSingleElement(double[] value) {
return (value.length == 1);
}
@Override
public void serializeContents(double[] value, JsonGenerator jgen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
for (int i = 0, len = value.length; i < len; ++i) {
jgen.writeNumber(value[i]);
}
}
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint)
{
ObjectNode o = createSchemaNode("array", true);
o.put("items", createSchemaNode("number"));
return o;
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
if (visitor != null) {
JsonArrayFormatVisitor v2 = visitor.expectArrayFormat(typeHint);
if (v2 != null) {
v2.itemsFormat(JsonFormatTypes.NUMBER);
}
}
}
}
}