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package com.fasterxml.jackson.jr.ob.impl;
import java.io.*;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.*;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.core.io.SerializedString;
import com.fasterxml.jackson.jr.ob.JSON;
import com.fasterxml.jackson.jr.ob.JSONObjectException;
import com.fasterxml.jackson.jr.ob.api.ValueWriter;
import static com.fasterxml.jackson.jr.ob.impl.ValueWriterLocator.*;
/**
* Object that handles serialization of simple Objects into underlying
* data format (usually JSON).
* Unlike {@link JSONReader}, writer does actually implement write methods itself
* and uses delegation for only some special cases.
*
* Life-cycle is such that initial instance (called blueprint)
* is constructed first (including possible configuration
* using mutant factory methods). This blueprint object
* acts as a factory, and is never used for direct writing;
* instead, per-call instance is created by calling
* {@link #perOperationInstance}.
*/
public class JSONWriter
{
private final static TimeZone DEFAULT_TIMEZONE = TimeZone.getTimeZone("UTC");
/*
/**********************************************************************
/* Blueprint config
/**********************************************************************
*/
/*
/**********************************************************************
/* Instance config
/**********************************************************************
*/
protected final TreeCodec _treeCodec;
/**
* Object that is used to dynamically find Bean (and custom type) value writers
*/
protected final ValueWriterLocator _writerLocator;
protected final JsonGenerator _generator;
protected final TimeZone _timezone;
protected final int _features;
protected final boolean _writeNullValues;
/*
/**********************************************************************
/* Blueprint construction
/**********************************************************************
*/
/**
* Constructor used for creating differently configured blueprint
* instances
*/
public JSONWriter()
{
_features = 0;
_writeNullValues = false;
_writerLocator = null;
_treeCodec = null;
_generator = null;
_timezone = DEFAULT_TIMEZONE;
}
/**
* Constructor for non-blueprint instances.
*
* @param base Blueprint instance to base settings of the new instance on
* @param features Active features for the write operation
* @param loc Helper object to use for dynamically located value writers
* @param tc TreeCodec to use for writing tree values, if any
* @param g Underlying streaming encoder to use
*/
protected JSONWriter(JSONWriter base, int features,
ValueWriterLocator loc, TreeCodec tc,
JsonGenerator g)
{
_features = features;
_writeNullValues = JSON.Feature.WRITE_NULL_PROPERTIES.isEnabled(features);
_treeCodec = tc;
_writerLocator = loc.perOperationInstance(this, features);
_generator = g;
_timezone = DEFAULT_TIMEZONE;
}
/*
/**********************************************************************
/* Mutant factories for blueprint
/**********************************************************************
*/
public JSONWriter withCacheCheck(int features) {
// int diff = (features ^ _features);
return this;
}
/*
/**********************************************************************
/* New instance creation
/**********************************************************************
*/
public JSONWriter perOperationInstance(int features,
ValueWriterLocator loc, TreeCodec tc,
JsonGenerator g)
{
if (getClass() != JSONWriter.class) { // sanity check
throw new IllegalStateException("Sub-classes MUST override perOperationInstance(...)");
}
return new JSONWriter(this, features, loc, tc, g);
}
/*
/**********************************************************************
/* Simple accessors
/**********************************************************************
*/
/**
* @since 2.11
*/
public boolean isEnabled(JSON.Feature f) {
return f.isEnabled(_features);
}
/**
* @since 2.13
*/
public int features() {
return _features;
}
/*
/**********************************************************************
/* Public write methods
/**********************************************************************
*/
/**
* Main entry point for non-blueprint instances: called for the root value to
* write it out.
*/
public void writeValue(Object value) throws IOException
{
if (value == null) {
writeNullValue();
return;
}
_writeValue(value, _writerLocator.findSerializationType(value.getClass()));
}
public void writeField(String fieldName, Object value, int type) throws IOException
{
switch (type) {
// Structured types:
case SER_MAP:
writeMapField(fieldName, (Map) value);
return;
case SER_LIST:
writeListField(fieldName, (List) value);
return;
case SER_COLLECTION:
writeCollectionField(fieldName, (Collection) value);
return;
case SER_OBJECT_ARRAY:
writeObjectArrayField(fieldName, (Object[]) value);
return;
case SER_INT_ARRAY:
writeIntArrayField(fieldName, (int[]) value);
return;
case SER_LONG_ARRAY:
writeLongArrayField(fieldName, (long[]) value);
return;
case SER_BOOLEAN_ARRAY:
writeBooleanArrayField(fieldName, (boolean[]) value);
return;
case SER_TREE_NODE:
writeTreeNodeField(fieldName, (TreeNode) value);
return;
// Textual types, similar:
case SER_STRING:
writeStringField(fieldName, (String) value);
return;
case SER_CHAR_ARRAY:
writeStringField(fieldName, new String((char[]) value));
return;
case SER_CHARACTER_SEQUENCE:
writeStringField(fieldName, ((CharSequence) value).toString());
return;
case SER_BYTE_ARRAY:
writeBinaryField(fieldName, (byte[]) value);
return;
// Number types:
case SER_NUMBER_BIG_DECIMAL:
writeBigDecimalField(fieldName, (BigDecimal) value);
return;
case SER_NUMBER_BIG_INTEGER:
writeBigIntegerField(fieldName, (BigInteger) value);
return;
case SER_NUMBER_FLOAT: // fall through
case SER_NUMBER_DOUBLE:
writeDoubleField(fieldName, ((Number) value).doubleValue());
return;
case SER_NUMBER_BYTE: // fall through
case SER_NUMBER_SHORT: // fall through
case SER_NUMBER_INTEGER:
writeIntField(fieldName, ((Number) value).intValue());
return;
case SER_NUMBER_LONG:
writeLongField(fieldName, ((Number) value).longValue());
return;
// Scalar types:
case SER_BOOLEAN:
writeBooleanField(fieldName, ((Boolean) value).booleanValue());
return;
case SER_CHAR:
writeStringField(fieldName, String.valueOf(value));
return;
case SER_CALENDAR:
writeDateField(fieldName, ((Calendar) value).getTime());
return;
case SER_DATE:
writeDateField(fieldName, (Date) value);
return;
case SER_ENUM:
writeEnumField(fieldName, (Enum) value);
return;
case SER_CLASS:
writeStringLikeField(fieldName, ((Class) value).getName(), type);
return;
case SER_FILE:
writeStringLikeField(fieldName, ((File) value).getAbsolutePath(), type);
return;
case SER_UUID:
case SER_URL:
case SER_URI:
writeStringLikeField(fieldName, value.toString(), type);
return;
// Others
case SER_ITERABLE:
writeIterableField(fieldName, (Iterable) value);
return;
case SER_UNKNOWN:
writeUnknownField(fieldName, value);
return;
}
if (type < 0) { // Bean type!
ValueWriter writer = _writerLocator.getValueWriter(type);
if (writer != null) { // sanity check
_generator.writeFieldName(fieldName);
writer.writeValue(this, _generator, value);
return;
}
}
_badType(type, value);
}
protected void _writeValue(Object value, int type) throws IOException
{
switch (type) {
// Structured types:
case SER_MAP:
writeMapValue((Map) value);
return;
case SER_LIST:
writeListValue((List) value);
return;
case SER_COLLECTION:
writeCollectionValue((Collection) value);
return;
case SER_OBJECT_ARRAY:
writeObjectArrayValue((Object[]) value);
return;
case SER_INT_ARRAY:
writeIntArrayValue((int[]) value);
return;
case SER_LONG_ARRAY:
writeLongArrayValue((long[]) value);
return;
case SER_BOOLEAN_ARRAY:
writeBooleanArrayValue((boolean[]) value);
return;
case SER_TREE_NODE:
writeTreeNodeValue((TreeNode) value);
return;
// Textual types, related:
case SER_STRING:
writeStringValue((String) value);
return;
case SER_CHAR_ARRAY:
writeStringValue(new String((char[]) value));
return;
case SER_CHARACTER_SEQUENCE:
writeStringValue(((CharSequence) value).toString());
return;
case SER_BYTE_ARRAY:
writeBinaryValue((byte[]) value);
return;
// Number types:
case SER_NUMBER_FLOAT: // fall through
case SER_NUMBER_DOUBLE:
writeDoubleValue(((Number) value).doubleValue());
return;
case SER_NUMBER_BYTE: // fall through
case SER_NUMBER_SHORT: // fall through
case SER_NUMBER_INTEGER:
writeIntValue(((Number) value).intValue());
return;
case SER_NUMBER_LONG:
writeLongValue(((Number) value).longValue());
return;
case SER_NUMBER_BIG_DECIMAL:
writeBigDecimalValue((BigDecimal) value);
return;
case SER_NUMBER_BIG_INTEGER:
writeBigIntegerValue((BigInteger) value);
return;
// Other scalar types:
case SER_BOOLEAN:
writeBooleanValue(((Boolean) value).booleanValue());
return;
case SER_CHAR:
writeStringValue(String.valueOf(value));
return;
case SER_CALENDAR:
writeDateValue(((Calendar) value).getTime());
return;
case SER_DATE:
writeDateValue((Date) value);
return;
case SER_ENUM:
writeEnumValue((Enum) value);
return;
case SER_CLASS:
writeStringLikeValue(((Class) value).getName(), type);
return;
case SER_FILE:
writeStringLikeValue(((File) value).getAbsolutePath(), type);
return;
// these type should be fine using toString()
case SER_UUID:
case SER_URL:
case SER_URI:
writeStringLikeValue(value.toString(), type);
return;
case SER_ITERABLE:
writeIterableValue((Iterable) value);
return;
case SER_UNKNOWN:
writeUnknownValue(value);
return;
}
if (type < 0) { // explicit ValueWriter
ValueWriter writer = _writerLocator.getValueWriter(type);
if (writer != null) { // sanity check
writer.writeValue(this, _generator, value);
return;
}
}
_badType(type, value);
}
/*
/**********************************************************************
/* Overridable concrete typed write methods, structured types
/**********************************************************************
*/
protected void writeCollectionValue(Collection v) throws IOException
{
_generator.writeStartArray();
for (Object ob : v) {
writeValue(ob);
}
_generator.writeEndArray();
}
protected void writeCollectionField(String fieldName, Collection v) throws IOException
{
_generator.writeFieldName(fieldName);
writeCollectionValue(v);
}
protected void writeIterableValue(Iterable v) throws IOException
{
_generator.writeStartArray();
for (Object ob : v) {
writeValue(ob);
}
_generator.writeEndArray();
}
protected void writeIterableField(String fieldName, Iterable v) throws IOException
{
_generator.writeFieldName(fieldName);
writeIterableValue(v);
}
protected void writeListValue(List list) throws IOException
{
_generator.writeStartArray();
for (int i = 0, len = list.size(); i < len; ++i) {
Object value = list.get(i);
if (value == null) {
_generator.writeNull();
continue;
}
_writeValue(value, _writerLocator.findSerializationType(value.getClass()));
}
_generator.writeEndArray();
}
protected void writeListField(String fieldName, List v) throws IOException
{
_generator.writeFieldName(fieldName);
writeListValue(v);
}
protected void writeMapValue(Map v) throws IOException
{
_generator.writeStartObject();
if (!v.isEmpty()) {
for (Map.Entry entry : v.entrySet()) {
String key = keyToString(entry.getKey());
Object value = entry.getValue();
if (value == null) {
if (_writeNullValues) {
writeNullField(key);
}
continue;
}
Class cls = value.getClass();
int type = _writerLocator.findSerializationType(cls);
writeField(key, value, type);
}
}
_generator.writeEndObject();
}
protected void writeMapField(String fieldName, Map v) throws IOException
{
_generator.writeFieldName(fieldName);
writeMapValue(v);
}
protected void writeObjectArrayValue(Object[] v) throws IOException {
_generator.writeStartArray();
for (int i = 0, len = v.length; i < len; ++i) {
writeValue(v[i]);
}
_generator.writeEndArray();
}
protected void writeObjectArrayField(String fieldName, Object[] v) throws IOException {
_generator.writeFieldName(fieldName);
writeObjectArrayValue(v);
}
protected void writeIntArrayValue(int[] v) throws IOException {
_generator.writeStartArray();
for (int i = 0, len = v.length; i < len; ++i) {
_generator.writeNumber(v[i]);
}
_generator.writeEndArray();
}
protected void writeIntArrayField(String fieldName, int[] v) throws IOException {
_generator.writeFieldName(fieldName);
writeIntArrayValue(v);
}
protected void writeLongArrayValue(long[] v) throws IOException {
_generator.writeStartArray();
for (int i = 0, len = v.length; i < len; ++i) {
_generator.writeNumber(v[i]);
}
_generator.writeEndArray();
}
protected void writeLongArrayField(String fieldName, long[] v) throws IOException {
_generator.writeFieldName(fieldName);
writeLongArrayValue(v);
}
protected void writeBooleanArrayValue(boolean[] v) throws IOException {
_generator.writeStartArray();
for (int i = 0, len = v.length; i < len; ++i) {
_generator.writeBoolean(v[i]);
}
_generator.writeEndArray();
}
protected void writeBooleanArrayField(String fieldName, boolean[] v) throws IOException {
_generator.writeFieldName(fieldName);
writeBooleanArrayValue(v);
}
protected void writeTreeNodeValue(TreeNode v) throws IOException {
if (_treeCodec == null) {
throw new JSONObjectException("No `TreeCodec` configured: can not serialize `TreeNode` values");
}
_treeCodec.writeTree(_generator, v);
}
protected void writeTreeNodeField(String fieldName, TreeNode v) throws IOException
{
_generator.writeFieldName(fieldName);
writeTreeNodeValue(v);
}
/*
/**********************************************************************
/* Overridable concrete typed write methods, primitives
/**********************************************************************
*/
protected void writeBooleanValue(boolean v) throws IOException {
_generator.writeBoolean(v);
}
protected void writeBooleanField(String fieldName, boolean v) throws IOException {
_generator.writeBooleanField(fieldName, v);
}
protected void writeIntValue(int v) throws IOException {
_generator.writeNumber(v);
}
protected void writeIntField(String fieldName, int v) throws IOException {
_generator.writeNumberField(fieldName, v);
}
protected void writeLongValue(long v) throws IOException {
_generator.writeNumber(v);
}
protected void writeBigIntegerValue(BigInteger v) throws IOException {
_generator.writeNumber(v);
}
protected void writeBigIntegerField(String fieldName, BigInteger v) throws IOException {
_generator.writeFieldName(fieldName);
writeBigIntegerValue(v);
}
protected void writeLongField(String fieldName, long v) throws IOException {
_generator.writeNumberField(fieldName, v);
}
protected void writeDoubleValue(double v) throws IOException {
_generator.writeNumber(v);
}
protected void writeDoubleField(String fieldName, double v) throws IOException {
_generator.writeNumberField(fieldName, v);
}
protected void writeBigDecimalValue(BigDecimal v) throws IOException {
_generator.writeNumber(v);
}
protected void writeBigDecimalField(String fieldName, BigDecimal v) throws IOException {
_generator.writeNumberField(fieldName, v);
}
/*
/**********************************************************************
/* Overridable concrete typed write methods, textual
/**********************************************************************
*/
protected void writeStringValue(String v) throws IOException {
_generator.writeString(v);
}
protected void writeStringField(String fieldName, String v) throws IOException {
_generator.writeStringField(fieldName, v);
}
protected void writeStringLikeValue(String v, int actualType) throws IOException {
_generator.writeString(v);
}
protected void writeStringLikeField(String fieldName, String v, int actualType) throws IOException {
_generator.writeStringField(fieldName, v);
}
protected void writeBinaryValue(byte[] data) throws IOException {
_generator.writeBinary(data);
}
protected void writeBinaryField(String fieldName, byte[] data) throws IOException {
_generator.writeBinaryField(fieldName, data);
}
/*
/**********************************************************************
/* Overridable concrete typed write methods, other
/**********************************************************************
*/
protected void writeNullValue() throws IOException {
_generator.writeNull();
}
protected void writeNullField(String fieldName) throws IOException {
if (_writeNullValues) {
_generator.writeNullField(fieldName);
}
}
protected void writeNullField(SerializedString fieldName) throws IOException {
if (_writeNullValues) {
_generator.writeFieldName(fieldName);
_generator.writeNull();
}
}
protected void writeDateValue(Date v) throws IOException {
if (JSON.Feature.WRITE_DATES_AS_TIMESTAMP.isEnabled(_features)) {
writeLongValue(v.getTime());
} else {
writeStringValue(dateToString(v));
}
}
protected void writeDateField(String fieldName, Date v) throws IOException {
if (JSON.Feature.WRITE_DATES_AS_TIMESTAMP.isEnabled(_features)) {
writeLongField(fieldName, v.getTime());
} else {
writeStringField(fieldName, dateToString(v));
}
}
protected void writeEnumValue(Enum v) throws IOException {
if (JSON.Feature.WRITE_ENUMS_USING_INDEX.isEnabled(_features)) {
writeIntValue(v.ordinal());
} else {
writeStringValue(v.toString());
}
}
protected void writeEnumField(String fieldName, Enum v) throws IOException {
if (JSON.Feature.WRITE_ENUMS_USING_INDEX.isEnabled(_features)) {
writeIntField(fieldName, v.ordinal());
} else {
writeStringField(fieldName, v.toString());
}
}
public void writeBeanValue(BeanPropertyWriter[] props, Object bean) throws IOException
{
_generator.writeStartObject();
for (int i = 0, end = props.length; i < end; ++i) {
BeanPropertyWriter property = props[i];
SerializedString name = property.name;
Object value = property.getValueFor(bean);
if (value == null) {
if (_writeNullValues) {
writeNullField(name);
}
continue;
}
int typeId = property.typeId;
if (typeId == 0) {
typeId = _writerLocator.findSerializationType(value.getClass());
}
_generator.writeFieldName(name);
_writeValue(value, typeId);
}
_generator.writeEndObject();
}
protected void writeUnknownValue(Object data) throws IOException {
_checkUnknown(data);
writeStringValue(data.toString());
}
protected void writeUnknownField(String fieldName, Object data) throws IOException {
_checkUnknown(data);
writeStringField(fieldName, data.toString());
}
protected void _checkUnknown(Object value) throws IOException
{
if (JSON.Feature.FAIL_ON_UNKNOWN_TYPE_WRITE.isEnabled(_features)) {
throw new JSONObjectException("Unrecognized type ("+value.getClass().getName()
+"), don't know how to write (disable "+JSON.Feature.FAIL_ON_UNKNOWN_TYPE_WRITE
+" to avoid exception)");
}
}
/*
/**********************************************************************
/* Overridable concrete typed write methods; key conversions:
/**********************************************************************
*/
protected String keyToString(Object rawKey)
{
if (rawKey instanceof String) {
return (String) rawKey;
}
return String.valueOf(rawKey);
}
/**
* @since 2.7
*/
protected String dateToString(Date v) {
if (v == null) {
return "";
}
// !!! 01-Dec-2015, tatu: Should really use proper DateFormat or something
// since this relies on system-wide defaults, and hard/impossible to
// change easily
return v.toString();
}
/*
/**********************************************************************
/* Other internal methods
/**********************************************************************
*/
private void _badType(int type, Object value)
{
if (type < 0) {
throw new IllegalStateException(String.format(
"Internal error: missing BeanDefinition for id %d (class %s)",
type, value.getClass().getName()));
}
throw new IllegalStateException(String.format(
"Unsupported type: %s (%s)", type, value.getClass().getName()));
}
}