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org.codehaus.jackson.map.deser.ArrayDeserializers Maven / Gradle / Ivy
Data Mapper package is a high-performance data binding package
built on Jackson JSON processor
package org.codehaus.jackson.map.deser;
import java.io.IOException;
import java.util.*;
import org.codehaus.jackson.*;
import org.codehaus.jackson.map.*;
import org.codehaus.jackson.map.type.*;
import org.codehaus.jackson.map.util.ArrayBuilders;
import org.codehaus.jackson.map.util.ObjectBuffer;
import org.codehaus.jackson.type.JavaType;
/**
* Container for deserializers used for instantiating "primitive arrays",
* arrays that contain non-object java primitive types.
*/
public class ArrayDeserializers
{
HashMap> _allDeserializers;
final static ArrayDeserializers instance = new ArrayDeserializers();
private ArrayDeserializers()
{
_allDeserializers = new HashMap>();
// note: we'll use component type as key, not array type
add(boolean.class, new BooleanDeser());
/* ByteDeser is bit special, as it has 2 separate modes of operation;
* one for String input (-> base64 input), the other for
* numeric input
*/
add(byte.class, new ByteDeser());
add(short.class, new ShortDeser());
add(int.class, new IntDeser());
add(long.class, new LongDeser());
add(float.class, new FloatDeser());
add(double.class, new DoubleDeser());
add(String.class, new StringDeser());
/* also: char[] is most likely only used with Strings; doesn't
* seem to make sense to transfer as numbers
*/
add(char.class, new CharDeser());
}
public static HashMap> getAll()
{
return instance._allDeserializers;
}
@SuppressWarnings("unchecked")
private void add(Class cls, JsonDeserializer deser)
{
_allDeserializers.put(TypeFactory.type(cls),
(JsonDeserializer) deser);
}
/*
/////////////////////////////////////////////////////////////
// Actual deserializers: efficient String[], char[] deserializers
/////////////////////////////////////////////////////////////
*/
final static class StringDeser
extends StdDeserializer
{
public StringDeser() { super(String[].class); }
public String[] deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException
{
// Ok: must point to START_ARRAY
if (jp.getCurrentToken() != JsonToken.START_ARRAY) {
throw ctxt.mappingException(_valueClass);
}
final ObjectBuffer buffer = ctxt.leaseObjectBuffer();
Object[] chunk = buffer.resetAndStart();
int ix = 0;
JsonToken t;
while ((t = jp.nextToken()) != JsonToken.END_ARRAY) {
// Ok: no need to convert Strings, but must recognize nulls
String value = (t == JsonToken.VALUE_NULL) ? null : jp.getText();
if (ix >= chunk.length) {
chunk = buffer.appendCompletedChunk(chunk);
ix = 0;
}
chunk[ix++] = value;
}
String[] result = buffer.completeAndClearBuffer(chunk, ix, String.class);
ctxt.returnObjectBuffer(buffer);
return result;
}
}
final static class CharDeser
extends StdDeserializer
{
public CharDeser() { super(char[].class); }
public char[] deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException
{
/* Won't take arrays, must get a String (could also
* convert other tokens to Strings... but let's not bother
* yet, doesn't seem to make sense)
*/
if (jp.getCurrentToken() != JsonToken.VALUE_STRING) {
throw ctxt.mappingException(_valueClass);
}
// note: can NOT return shared internal buffer, must copy:
char[] buffer = jp.getTextCharacters();
int offset = jp.getTextOffset();
int len = jp.getTextLength();
char[] result = new char[len];
System.arraycopy(buffer, offset, result, 0, len);
return result;
}
}
/*
/////////////////////////////////////////////////////////////
// Actual deserializers: primivate array desers
/////////////////////////////////////////////////////////////
*/
final static class BooleanDeser
extends StdDeserializer
{
public BooleanDeser() { super(boolean[].class); }
public boolean[] deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException
{
if (jp.getCurrentToken() != JsonToken.START_ARRAY) {
throw ctxt.mappingException(_valueClass);
}
ArrayBuilders.BooleanBuilder builder = ctxt.getArrayBuilders().getBooleanBuilder();
boolean[] chunk = builder.resetAndStart();
int ix = 0;
while (jp.nextToken() != JsonToken.END_ARRAY) {
// whether we should allow truncating conversions?
boolean value = _parseBoolean(jp, ctxt);
if (ix >= chunk.length) {
chunk = builder.appendCompletedChunk(chunk, ix);
ix = 0;
}
chunk[ix++] = value;
}
return builder.completeAndClearBuffer(chunk, ix);
}
}
/**
* When dealing with byte arrays we have one more alternative (compared
* to int/long/shorts): base64 encoded data.
*/
final static class ByteDeser
extends StdDeserializer
{
public ByteDeser() { super(byte[].class); }
public byte[] deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException
{
JsonToken t = jp.getCurrentToken();
// Most likely case: base64 encoded String?
if (t == JsonToken.VALUE_STRING) {
return jp.getBinaryValue(ctxt.getBase64Variant());
}
// 31-Dec-2009, tatu: Also may be hidden as embedded Object
if (t == JsonToken.VALUE_EMBEDDED_OBJECT) {
Object ob = jp.getEmbeddedObject();
if (ob == null) return null;
if (ob instanceof byte[]) {
return (byte[]) ob;
}
}
if (t != JsonToken.START_ARRAY) {
throw ctxt.mappingException(_valueClass);
}
ArrayBuilders.ByteBuilder builder = ctxt.getArrayBuilders().getByteBuilder();
byte[] chunk = builder.resetAndStart();
int ix = 0;
while ((t = jp.nextToken()) != JsonToken.END_ARRAY) {
// whether we should allow truncating conversions?
byte value;
if (t == JsonToken.VALUE_NUMBER_INT || t == JsonToken.VALUE_NUMBER_FLOAT) {
// should we catch overflow exceptions?
value = jp.getByteValue();
} else {
// [JACKSON-79]: should probably accept nulls as 'false'
if (t != JsonToken.VALUE_NULL) {
throw ctxt.mappingException(_valueClass.getComponentType());
}
value = (byte) 0;
}
if (ix >= chunk.length) {
chunk = builder.appendCompletedChunk(chunk, ix);
ix = 0;
}
chunk[ix++] = value;
}
return builder.completeAndClearBuffer(chunk, ix);
}
}
final static class ShortDeser
extends StdDeserializer
{
public ShortDeser() { super(short[].class); }
public short[] deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException
{
if (jp.getCurrentToken() != JsonToken.START_ARRAY) {
throw ctxt.mappingException(_valueClass);
}
ArrayBuilders.ShortBuilder builder = ctxt.getArrayBuilders().getShortBuilder();
short[] chunk = builder.resetAndStart();
int ix = 0;
while (jp.nextToken() != JsonToken.END_ARRAY) {
short value = _parseShort(jp, ctxt);
if (ix >= chunk.length) {
chunk = builder.appendCompletedChunk(chunk, ix);
ix = 0;
}
chunk[ix++] = value;
}
return builder.completeAndClearBuffer(chunk, ix);
}
}
final static class IntDeser
extends StdDeserializer
{
public IntDeser() { super(int[].class); }
public int[] deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException
{
if (jp.getCurrentToken() != JsonToken.START_ARRAY) {
throw ctxt.mappingException(_valueClass);
}
ArrayBuilders.IntBuilder builder = ctxt.getArrayBuilders().getIntBuilder();
int[] chunk = builder.resetAndStart();
int ix = 0;
while (jp.nextToken() != JsonToken.END_ARRAY) {
// whether we should allow truncating conversions?
int value = _parseInt(jp, ctxt);
if (ix >= chunk.length) {
chunk = builder.appendCompletedChunk(chunk, ix);
ix = 0;
}
chunk[ix++] = value;
}
return builder.completeAndClearBuffer(chunk, ix);
}
}
final static class LongDeser
extends StdDeserializer
{
public LongDeser() { super(long[].class); }
public long[] deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException
{
if (jp.getCurrentToken() != JsonToken.START_ARRAY) {
throw ctxt.mappingException(_valueClass);
}
ArrayBuilders.LongBuilder builder = ctxt.getArrayBuilders().getLongBuilder();
long[] chunk = builder.resetAndStart();
int ix = 0;
while (jp.nextToken() != JsonToken.END_ARRAY) {
long value = _parseLong(jp, ctxt);
if (ix >= chunk.length) {
chunk = builder.appendCompletedChunk(chunk, ix);
ix = 0;
}
chunk[ix++] = value;
}
return builder.completeAndClearBuffer(chunk, ix);
}
}
final static class FloatDeser
extends StdDeserializer
{
public FloatDeser() { super(float[].class); }
public float[] deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException
{
if (jp.getCurrentToken() != JsonToken.START_ARRAY) {
throw ctxt.mappingException(_valueClass);
}
ArrayBuilders.FloatBuilder builder = ctxt.getArrayBuilders().getFloatBuilder();
float[] chunk = builder.resetAndStart();
int ix = 0;
while (jp.nextToken() != JsonToken.END_ARRAY) {
// whether we should allow truncating conversions?
float value = _parseFloat(jp, ctxt);
if (ix >= chunk.length) {
chunk = builder.appendCompletedChunk(chunk, ix);
ix = 0;
}
chunk[ix++] = value;
}
return builder.completeAndClearBuffer(chunk, ix);
}
}
final static class DoubleDeser
extends StdDeserializer
{
public DoubleDeser() { super(double[].class); }
public double[] deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException
{
if (jp.getCurrentToken() != JsonToken.START_ARRAY) {
throw ctxt.mappingException(_valueClass);
}
ArrayBuilders.DoubleBuilder builder = ctxt.getArrayBuilders().getDoubleBuilder();
double[] chunk = builder.resetAndStart();
int ix = 0;
while (jp.nextToken() != JsonToken.END_ARRAY) {
double value = _parseDouble(jp, ctxt);
if (ix >= chunk.length) {
chunk = builder.appendCompletedChunk(chunk, ix);
ix = 0;
}
chunk[ix++] = value;
}
return builder.completeAndClearBuffer(chunk, ix);
}
}
}
