| package com.fasterxml.jackson.databind.deser.std; |
| |
| import java.io.IOException; |
| import java.util.*; |
| |
| import com.fasterxml.jackson.annotation.JsonFormat; |
| import com.fasterxml.jackson.annotation.Nulls; |
| import com.fasterxml.jackson.core.*; |
| import com.fasterxml.jackson.core.exc.InputCoercionException; |
| import com.fasterxml.jackson.core.io.NumberInput; |
| import com.fasterxml.jackson.databind.*; |
| import com.fasterxml.jackson.databind.annotation.JacksonStdImpl; |
| import com.fasterxml.jackson.databind.deser.BeanDeserializerBase; |
| import com.fasterxml.jackson.databind.deser.NullValueProvider; |
| import com.fasterxml.jackson.databind.deser.SettableBeanProperty; |
| import com.fasterxml.jackson.databind.deser.ValueInstantiator; |
| import com.fasterxml.jackson.databind.deser.impl.NullsAsEmptyProvider; |
| import com.fasterxml.jackson.databind.deser.impl.NullsConstantProvider; |
| import com.fasterxml.jackson.databind.deser.impl.NullsFailProvider; |
| import com.fasterxml.jackson.databind.introspect.AnnotatedMember; |
| import com.fasterxml.jackson.databind.jsontype.TypeDeserializer; |
| import com.fasterxml.jackson.databind.util.AccessPattern; |
| import com.fasterxml.jackson.databind.util.ClassUtil; |
| import com.fasterxml.jackson.databind.util.Converter; |
| |
| /** |
| * Base class for common deserializers. Contains shared |
| * base functionality for dealing with primitive values, such |
| * as (re)parsing from String. |
| */ |
| public abstract class StdDeserializer<T> |
| extends JsonDeserializer<T> |
| implements java.io.Serializable |
| { |
| private static final long serialVersionUID = 1L; |
| |
| /** |
| * Bitmask that covers {@link DeserializationFeature#USE_BIG_INTEGER_FOR_INTS} |
| * and {@link DeserializationFeature#USE_LONG_FOR_INTS}, used for more efficient |
| * cheks when coercing integral values for untyped deserialization. |
| * |
| * @since 2.6 |
| */ |
| protected final static int F_MASK_INT_COERCIONS = |
| DeserializationFeature.USE_BIG_INTEGER_FOR_INTS.getMask() |
| | DeserializationFeature.USE_LONG_FOR_INTS.getMask(); |
| |
| // @since 2.9 |
| protected final static int F_MASK_ACCEPT_ARRAYS = |
| DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS.getMask() | |
| DeserializationFeature.ACCEPT_EMPTY_ARRAY_AS_NULL_OBJECT.getMask(); |
| |
| |
| /** |
| * Type of values this deserializer handles: sometimes |
| * exact types, other time most specific supertype of |
| * types deserializer handles (which may be as generic |
| * as {@link Object} in some case) |
| */ |
| final protected Class<?> _valueClass; |
| |
| final protected JavaType _valueType; |
| |
| protected StdDeserializer(Class<?> vc) { |
| _valueClass = vc; |
| _valueType = null; |
| } |
| |
| protected StdDeserializer(JavaType valueType) { |
| // 26-Sep-2017, tatu: [databind#1764] need to add null-check back until 3.x |
| _valueClass = (valueType == null) ? Object.class : valueType.getRawClass(); |
| _valueType = valueType; |
| } |
| |
| /** |
| * Copy-constructor for sub-classes to use, most often when creating |
| * new instances for {@link com.fasterxml.jackson.databind.deser.ContextualDeserializer}. |
| * |
| * @since 2.5 |
| */ |
| protected StdDeserializer(StdDeserializer<?> src) { |
| _valueClass = src._valueClass; |
| _valueType = src._valueType; |
| } |
| |
| /* |
| /********************************************************** |
| /* Accessors |
| /********************************************************** |
| */ |
| |
| @Override |
| public Class<?> handledType() { return _valueClass; } |
| |
| /* |
| /********************************************************** |
| /* Extended API |
| /********************************************************** |
| */ |
| |
| /** |
| * @deprecated Since 2.3 use {@link #handledType} instead |
| */ |
| @Deprecated |
| public final Class<?> getValueClass() { return _valueClass; } |
| |
| /** |
| * Exact structured type this deserializer handles, if known. |
| */ |
| public JavaType getValueType() { return _valueType; } |
| |
| /** |
| * Convenience method for getting handled type as {@link JavaType}, regardless |
| * of whether deserializer has one already resolved (and accessible via |
| * {@link #getValueType()}) or not: equivalent to: |
| *<pre> |
| * if (getValueType() != null) { |
| * return getValueType(); |
| * } |
| * return ctxt.constructType(handledType()); |
| *</pre> |
| * |
| * @since 2.10 |
| */ |
| public JavaType getValueType(DeserializationContext ctxt) { |
| if (_valueType != null) { |
| return _valueType; |
| } |
| return ctxt.constructType(_valueClass); |
| } |
| |
| /** |
| * Method that can be called to determine if given deserializer is the default |
| * deserializer Jackson uses; as opposed to a custom deserializer installed by |
| * a module or calling application. Determination is done using |
| * {@link JacksonStdImpl} annotation on deserializer class. |
| */ |
| protected boolean isDefaultDeserializer(JsonDeserializer<?> deserializer) { |
| return ClassUtil.isJacksonStdImpl(deserializer); |
| } |
| |
| protected boolean isDefaultKeyDeserializer(KeyDeserializer keyDeser) { |
| return ClassUtil.isJacksonStdImpl(keyDeser); |
| } |
| |
| /* |
| /********************************************************** |
| /* Partial JsonDeserializer implementation |
| /********************************************************** |
| */ |
| |
| /** |
| * Base implementation that does not assume specific type |
| * inclusion mechanism. Sub-classes are expected to override |
| * this method if they are to handle type information. |
| */ |
| @Override |
| public Object deserializeWithType(JsonParser p, DeserializationContext ctxt, |
| TypeDeserializer typeDeserializer) throws IOException { |
| return typeDeserializer.deserializeTypedFromAny(p, ctxt); |
| } |
| |
| /* |
| /********************************************************** |
| /* Helper methods for sub-classes, parsing: while mostly |
| /* useful for numeric types, can be also useful for dealing |
| /* with things serialized as numbers (such as Dates). |
| /********************************************************** |
| */ |
| |
| protected final boolean _parseBooleanPrimitive(JsonParser p, DeserializationContext ctxt) throws IOException |
| { |
| JsonToken t = p.getCurrentToken(); |
| if (t == JsonToken.VALUE_TRUE) return true; |
| if (t == JsonToken.VALUE_FALSE) return false; |
| if (t == JsonToken.VALUE_NULL) { |
| _verifyNullForPrimitive(ctxt); |
| return false; |
| } |
| |
| // should accept ints too, (0 == false, otherwise true) |
| if (t == JsonToken.VALUE_NUMBER_INT) { |
| return _parseBooleanFromInt(p, ctxt); |
| } |
| // And finally, let's allow Strings to be converted too |
| if (t == JsonToken.VALUE_STRING) { |
| String text = p.getText().trim(); |
| // [databind#422]: Allow aliases |
| if ("true".equals(text) || "True".equals(text)) { |
| return true; |
| } |
| if ("false".equals(text) || "False".equals(text)) { |
| return false; |
| } |
| if (_isEmptyOrTextualNull(text)) { |
| _verifyNullForPrimitiveCoercion(ctxt, text); |
| return false; |
| } |
| Boolean b = (Boolean) ctxt.handleWeirdStringValue(_valueClass, text, |
| "only \"true\" or \"false\" recognized"); |
| return Boolean.TRUE.equals(b); |
| } |
| // [databind#381] |
| if (t == JsonToken.START_ARRAY && ctxt.isEnabled(DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS)) { |
| p.nextToken(); |
| final boolean parsed = _parseBooleanPrimitive(p, ctxt); |
| _verifyEndArrayForSingle(p, ctxt); |
| return parsed; |
| } |
| // Otherwise, no can do: |
| return ((Boolean) ctxt.handleUnexpectedToken(_valueClass, p)).booleanValue(); |
| } |
| |
| protected boolean _parseBooleanFromInt(JsonParser p, DeserializationContext ctxt) |
| throws IOException |
| { |
| // 13-Oct-2016, tatu: As per [databind#1324], need to be careful wrt |
| // degenerate case of huge integers, legal in JSON. |
| // ... this is, on the other hand, probably wrong/sub-optimal for non-JSON |
| // input. For now, no rea |
| _verifyNumberForScalarCoercion(ctxt, p); |
| // Anyway, note that since we know it's valid (JSON) integer, it can't have |
| // extra whitespace to trim. |
| return !"0".equals(p.getText()); |
| } |
| |
| protected final byte _parseBytePrimitive(JsonParser p, DeserializationContext ctxt) |
| throws IOException |
| { |
| int value = _parseIntPrimitive(p, ctxt); |
| // So far so good: but does it fit? |
| if (_byteOverflow(value)) { |
| Number v = (Number) ctxt.handleWeirdStringValue(_valueClass, String.valueOf(value), |
| "overflow, value cannot be represented as 8-bit value"); |
| return _nonNullNumber(v).byteValue(); |
| } |
| return (byte) value; |
| } |
| |
| protected final short _parseShortPrimitive(JsonParser p, DeserializationContext ctxt) |
| throws IOException |
| { |
| int value = _parseIntPrimitive(p, ctxt); |
| // So far so good: but does it fit? |
| if (_shortOverflow(value)) { |
| Number v = (Number) ctxt.handleWeirdStringValue(_valueClass, String.valueOf(value), |
| "overflow, value cannot be represented as 16-bit value"); |
| return _nonNullNumber(v).shortValue(); |
| } |
| return (short) value; |
| } |
| |
| protected final int _parseIntPrimitive(JsonParser p, DeserializationContext ctxt) |
| throws IOException |
| { |
| if (p.hasToken(JsonToken.VALUE_NUMBER_INT)) { |
| return p.getIntValue(); |
| } |
| switch (p.getCurrentTokenId()) { |
| case JsonTokenId.ID_STRING: |
| String text = p.getText().trim(); |
| if (_isEmptyOrTextualNull(text)) { |
| _verifyNullForPrimitiveCoercion(ctxt, text); |
| return 0; |
| } |
| return _parseIntPrimitive(ctxt, text); |
| case JsonTokenId.ID_NUMBER_FLOAT: |
| if (!ctxt.isEnabled(DeserializationFeature.ACCEPT_FLOAT_AS_INT)) { |
| _failDoubleToIntCoercion(p, ctxt, "int"); |
| } |
| return p.getValueAsInt(); |
| case JsonTokenId.ID_NULL: |
| _verifyNullForPrimitive(ctxt); |
| return 0; |
| case JsonTokenId.ID_START_ARRAY: |
| if (ctxt.isEnabled(DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS)) { |
| p.nextToken(); |
| final int parsed = _parseIntPrimitive(p, ctxt); |
| _verifyEndArrayForSingle(p, ctxt); |
| return parsed; |
| } |
| break; |
| default: |
| } |
| // Otherwise, no can do: |
| return ((Number) ctxt.handleUnexpectedToken(_valueClass, p)).intValue(); |
| } |
| |
| /** |
| * @since 2.9 |
| */ |
| protected final int _parseIntPrimitive(DeserializationContext ctxt, String text) throws IOException |
| { |
| try { |
| if (text.length() > 9) { |
| long l = Long.parseLong(text); |
| if (_intOverflow(l)) { |
| Number v = (Number) ctxt.handleWeirdStringValue(_valueClass, text, |
| "Overflow: numeric value (%s) out of range of int (%d -%d)", |
| text, Integer.MIN_VALUE, Integer.MAX_VALUE); |
| return _nonNullNumber(v).intValue(); |
| } |
| return (int) l; |
| } |
| return NumberInput.parseInt(text); |
| } catch (IllegalArgumentException iae) { |
| Number v = (Number) ctxt.handleWeirdStringValue(_valueClass, text, |
| "not a valid int value"); |
| return _nonNullNumber(v).intValue(); |
| } |
| } |
| |
| protected final long _parseLongPrimitive(JsonParser p, DeserializationContext ctxt) |
| throws IOException |
| { |
| if (p.hasToken(JsonToken.VALUE_NUMBER_INT)) { |
| return p.getLongValue(); |
| } |
| switch (p.getCurrentTokenId()) { |
| case JsonTokenId.ID_STRING: |
| String text = p.getText().trim(); |
| if (_isEmptyOrTextualNull(text)) { |
| _verifyNullForPrimitiveCoercion(ctxt, text); |
| return 0L; |
| } |
| return _parseLongPrimitive(ctxt, text); |
| case JsonTokenId.ID_NUMBER_FLOAT: |
| if (!ctxt.isEnabled(DeserializationFeature.ACCEPT_FLOAT_AS_INT)) { |
| _failDoubleToIntCoercion(p, ctxt, "long"); |
| } |
| return p.getValueAsLong(); |
| case JsonTokenId.ID_NULL: |
| _verifyNullForPrimitive(ctxt); |
| return 0L; |
| case JsonTokenId.ID_START_ARRAY: |
| if (ctxt.isEnabled(DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS)) { |
| p.nextToken(); |
| final long parsed = _parseLongPrimitive(p, ctxt); |
| _verifyEndArrayForSingle(p, ctxt); |
| return parsed; |
| } |
| break; |
| } |
| return ((Number) ctxt.handleUnexpectedToken(_valueClass, p)).longValue(); |
| } |
| |
| /** |
| * @since 2.9 |
| */ |
| protected final long _parseLongPrimitive(DeserializationContext ctxt, String text) throws IOException |
| { |
| try { |
| return NumberInput.parseLong(text); |
| } catch (IllegalArgumentException iae) { } |
| { |
| Number v = (Number) ctxt.handleWeirdStringValue(_valueClass, text, |
| "not a valid long value"); |
| return _nonNullNumber(v).longValue(); |
| } |
| } |
| |
| protected final float _parseFloatPrimitive(JsonParser p, DeserializationContext ctxt) |
| throws IOException |
| { |
| if (p.hasToken(JsonToken.VALUE_NUMBER_FLOAT)) { |
| return p.getFloatValue(); |
| } |
| switch (p.getCurrentTokenId()) { |
| case JsonTokenId.ID_STRING: |
| String text = p.getText().trim(); |
| if (_isEmptyOrTextualNull(text)) { |
| _verifyNullForPrimitiveCoercion(ctxt, text); |
| return 0.0f; |
| } |
| return _parseFloatPrimitive(ctxt, text); |
| case JsonTokenId.ID_NUMBER_INT: |
| return p.getFloatValue(); |
| case JsonTokenId.ID_NULL: |
| _verifyNullForPrimitive(ctxt); |
| return 0.0f; |
| case JsonTokenId.ID_START_ARRAY: |
| if (ctxt.isEnabled(DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS)) { |
| p.nextToken(); |
| final float parsed = _parseFloatPrimitive(p, ctxt); |
| _verifyEndArrayForSingle(p, ctxt); |
| return parsed; |
| } |
| break; |
| } |
| // Otherwise, no can do: |
| return ((Number) ctxt.handleUnexpectedToken(_valueClass, p)).floatValue(); |
| } |
| |
| /** |
| * @since 2.9 |
| */ |
| protected final float _parseFloatPrimitive(DeserializationContext ctxt, String text) |
| throws IOException |
| { |
| switch (text.charAt(0)) { |
| case 'I': |
| if (_isPosInf(text)) { |
| return Float.POSITIVE_INFINITY; |
| } |
| break; |
| case 'N': |
| if (_isNaN(text)) { return Float.NaN; } |
| break; |
| case '-': |
| if (_isNegInf(text)) { |
| return Float.NEGATIVE_INFINITY; |
| } |
| break; |
| } |
| try { |
| return Float.parseFloat(text); |
| } catch (IllegalArgumentException iae) { } |
| Number v = (Number) ctxt.handleWeirdStringValue(_valueClass, text, |
| "not a valid float value"); |
| return _nonNullNumber(v).floatValue(); |
| } |
| |
| protected final double _parseDoublePrimitive(JsonParser p, DeserializationContext ctxt) |
| throws IOException |
| { |
| if (p.hasToken(JsonToken.VALUE_NUMBER_FLOAT)) { |
| return p.getDoubleValue(); |
| } |
| switch (p.getCurrentTokenId()) { |
| case JsonTokenId.ID_STRING: |
| String text = p.getText().trim(); |
| if (_isEmptyOrTextualNull(text)) { |
| _verifyNullForPrimitiveCoercion(ctxt, text); |
| return 0.0; |
| } |
| return _parseDoublePrimitive(ctxt, text); |
| case JsonTokenId.ID_NUMBER_INT: |
| return p.getDoubleValue(); |
| case JsonTokenId.ID_NULL: |
| _verifyNullForPrimitive(ctxt); |
| return 0.0; |
| case JsonTokenId.ID_START_ARRAY: |
| if (ctxt.isEnabled(DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS)) { |
| p.nextToken(); |
| final double parsed = _parseDoublePrimitive(p, ctxt); |
| _verifyEndArrayForSingle(p, ctxt); |
| return parsed; |
| } |
| break; |
| } |
| // Otherwise, no can do: |
| return ((Number) ctxt.handleUnexpectedToken(_valueClass, p)).doubleValue(); |
| } |
| |
| /** |
| * @since 2.9 |
| */ |
| protected final double _parseDoublePrimitive(DeserializationContext ctxt, String text) |
| throws IOException |
| { |
| switch (text.charAt(0)) { |
| case 'I': |
| if (_isPosInf(text)) { |
| return Double.POSITIVE_INFINITY; |
| } |
| break; |
| case 'N': |
| if (_isNaN(text)) { |
| return Double.NaN; |
| } |
| break; |
| case '-': |
| if (_isNegInf(text)) { |
| return Double.NEGATIVE_INFINITY; |
| } |
| break; |
| } |
| try { |
| return parseDouble(text); |
| } catch (IllegalArgumentException iae) { } |
| Number v = (Number) ctxt.handleWeirdStringValue(_valueClass, text, |
| "not a valid double value (as String to convert)"); |
| return _nonNullNumber(v).doubleValue(); |
| } |
| |
| protected java.util.Date _parseDate(JsonParser p, DeserializationContext ctxt) |
| throws IOException |
| { |
| switch (p.getCurrentTokenId()) { |
| case JsonTokenId.ID_STRING: |
| return _parseDate(p.getText().trim(), ctxt); |
| case JsonTokenId.ID_NUMBER_INT: |
| { |
| long ts; |
| try { |
| ts = p.getLongValue(); |
| // 16-Jan-2019, tatu: 2.10 uses InputCoercionException, earlier JsonParseException |
| // (but leave both until 3.0) |
| } catch (JsonParseException | InputCoercionException e) { |
| Number v = (Number) ctxt.handleWeirdNumberValue(_valueClass, p.getNumberValue(), |
| "not a valid 64-bit long for creating `java.util.Date`"); |
| ts = v.longValue(); |
| } |
| return new java.util.Date(ts); |
| } |
| case JsonTokenId.ID_NULL: |
| return (java.util.Date) getNullValue(ctxt); |
| case JsonTokenId.ID_START_ARRAY: |
| return _parseDateFromArray(p, ctxt); |
| } |
| return (java.util.Date) ctxt.handleUnexpectedToken(_valueClass, p); |
| } |
| |
| // @since 2.9 |
| protected java.util.Date _parseDateFromArray(JsonParser p, DeserializationContext ctxt) |
| throws IOException |
| { |
| JsonToken t; |
| if (ctxt.hasSomeOfFeatures(F_MASK_ACCEPT_ARRAYS)) { |
| t = p.nextToken(); |
| if (t == JsonToken.END_ARRAY) { |
| if (ctxt.isEnabled(DeserializationFeature.ACCEPT_EMPTY_ARRAY_AS_NULL_OBJECT)) { |
| return (java.util.Date) getNullValue(ctxt); |
| } |
| } |
| if (ctxt.isEnabled(DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS)) { |
| final Date parsed = _parseDate(p, ctxt); |
| _verifyEndArrayForSingle(p, ctxt); |
| return parsed; |
| } |
| } else { |
| t = p.getCurrentToken(); |
| } |
| return (java.util.Date) ctxt.handleUnexpectedToken(_valueClass, t, p, null); |
| } |
| |
| /** |
| * @since 2.8 |
| */ |
| protected java.util.Date _parseDate(String value, DeserializationContext ctxt) |
| throws IOException |
| { |
| try { |
| // Take empty Strings to mean 'empty' Value, usually 'null': |
| if (_isEmptyOrTextualNull(value)) { |
| return (java.util.Date) getNullValue(ctxt); |
| } |
| return ctxt.parseDate(value); |
| } catch (IllegalArgumentException iae) { |
| return (java.util.Date) ctxt.handleWeirdStringValue(_valueClass, value, |
| "not a valid representation (error: %s)", |
| ClassUtil.exceptionMessage(iae)); |
| } |
| } |
| |
| /** |
| * Helper method for encapsulating calls to low-level double value parsing; single place |
| * just because we need a work-around that must be applied to all calls. |
| */ |
| protected final static double parseDouble(String numStr) throws NumberFormatException |
| { |
| // avoid some nasty float representations... but should it be MIN_NORMAL or MIN_VALUE? |
| if (NumberInput.NASTY_SMALL_DOUBLE.equals(numStr)) { |
| return Double.MIN_NORMAL; // since 2.7; was MIN_VALUE prior |
| } |
| return Double.parseDouble(numStr); |
| } |
| |
| /** |
| * Helper method used for accessing String value, if possible, doing |
| * necessary conversion or throwing exception as necessary. |
| * |
| * @since 2.1 |
| */ |
| protected final String _parseString(JsonParser p, DeserializationContext ctxt) throws IOException |
| { |
| JsonToken t = p.getCurrentToken(); |
| if (t == JsonToken.VALUE_STRING) { |
| return p.getText(); |
| } |
| // 07-Nov-2016, tatu: Caller should take care of unwrapping and there shouldn't |
| // be need for extra pass here... |
| /* |
| // [databind#381] |
| if ((t == JsonToken.START_ARRAY) && ctxt.isEnabled(DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS)) { |
| p.nextToken(); |
| final String parsed = _parseString(p, ctxt); |
| _verifyEndArrayForSingle(p, ctxt); |
| return parsed; |
| } |
| */ |
| String value = p.getValueAsString(); |
| if (value != null) { |
| return value; |
| } |
| return (String) ctxt.handleUnexpectedToken(String.class, p); |
| } |
| |
| /** |
| * Helper method that may be used to support fallback for Empty String / Empty Array |
| * non-standard representations; usually for things serialized as JSON Objects. |
| * |
| * @since 2.5 |
| */ |
| @SuppressWarnings("unchecked") |
| protected T _deserializeFromEmpty(JsonParser p, DeserializationContext ctxt) |
| throws IOException |
| { |
| JsonToken t = p.getCurrentToken(); |
| if (t == JsonToken.START_ARRAY) { |
| if (ctxt.isEnabled(DeserializationFeature.ACCEPT_EMPTY_ARRAY_AS_NULL_OBJECT)) { |
| t = p.nextToken(); |
| if (t == JsonToken.END_ARRAY) { |
| return null; |
| } |
| return (T) ctxt.handleUnexpectedToken(handledType(), p); |
| } |
| } else if (t == JsonToken.VALUE_STRING) { |
| if (ctxt.isEnabled(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT)) { |
| String str = p.getText().trim(); |
| if (str.isEmpty()) { |
| return null; |
| } |
| } |
| } |
| return (T) ctxt.handleUnexpectedToken(handledType(), p); |
| } |
| |
| /** |
| * Helper method called to determine if we are seeing String value of |
| * "null", and, further, that it should be coerced to null just like |
| * null token. |
| * |
| * @since 2.3 |
| */ |
| protected boolean _hasTextualNull(String value) { |
| return "null".equals(value); |
| } |
| |
| /** |
| * @since 2.9 |
| */ |
| protected boolean _isEmptyOrTextualNull(String value) { |
| return value.isEmpty() || "null".equals(value); |
| } |
| |
| protected final boolean _isNegInf(String text) { |
| return "-Infinity".equals(text) || "-INF".equals(text); |
| } |
| |
| protected final boolean _isPosInf(String text) { |
| return "Infinity".equals(text) || "INF".equals(text); |
| } |
| |
| protected final boolean _isNaN(String text) { return "NaN".equals(text); } |
| |
| /* |
| /********************************************************** |
| /* Helper methods for sub-classes regarding decoding from |
| /* alternate representations |
| /********************************************************** |
| */ |
| |
| /** |
| * Helper method that allows easy support for array-related {@link DeserializationFeature}s |
| * `ACCEPT_EMPTY_ARRAY_AS_NULL_OBJECT` and `UNWRAP_SINGLE_VALUE_ARRAYS`: checks for either |
| * empty array, or single-value array-wrapped value (respectively), and either reports |
| * an exception (if no match, or feature(s) not enabled), or returns appropriate |
| * result value. |
| *<p> |
| * This method should NOT be called if Array representation is explicitly supported |
| * for type: it should only be called in case it is otherwise unrecognized. |
| *<p> |
| * NOTE: in case of unwrapped single element, will handle actual decoding |
| * by calling {@link #_deserializeWrappedValue}, which by default calls |
| * {@link #deserialize(JsonParser, DeserializationContext)}. |
| * |
| * @since 2.9 |
| */ |
| protected T _deserializeFromArray(JsonParser p, DeserializationContext ctxt) throws IOException |
| { |
| JsonToken t; |
| if (ctxt.hasSomeOfFeatures(F_MASK_ACCEPT_ARRAYS)) { |
| t = p.nextToken(); |
| if (t == JsonToken.END_ARRAY) { |
| if (ctxt.isEnabled(DeserializationFeature.ACCEPT_EMPTY_ARRAY_AS_NULL_OBJECT)) { |
| return getNullValue(ctxt); |
| } |
| } |
| if (ctxt.isEnabled(DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS)) { |
| final T parsed = deserialize(p, ctxt); |
| if (p.nextToken() != JsonToken.END_ARRAY) { |
| handleMissingEndArrayForSingle(p, ctxt); |
| } |
| return parsed; |
| } |
| } else { |
| t = p.getCurrentToken(); |
| } |
| @SuppressWarnings("unchecked") |
| T result = (T) ctxt.handleUnexpectedToken(getValueType(ctxt), p.getCurrentToken(), p, null); |
| return result; |
| } |
| |
| /** |
| * Helper called to support {@link DeserializationFeature#UNWRAP_SINGLE_VALUE_ARRAYS}: |
| * default implementation simply calls |
| * {@link #deserialize(JsonParser, DeserializationContext)}, |
| * but handling may be overridden. |
| * |
| * @since 2.9 |
| */ |
| protected T _deserializeWrappedValue(JsonParser p, DeserializationContext ctxt) throws IOException |
| { |
| // 23-Mar-2017, tatu: Let's specifically block recursive resolution to avoid |
| // either supporting nested arrays, or to cause infinite looping. |
| if (p.hasToken(JsonToken.START_ARRAY)) { |
| String msg = String.format( |
| "Cannot deserialize instance of %s out of %s token: nested Arrays not allowed with %s", |
| ClassUtil.nameOf(_valueClass), JsonToken.START_ARRAY, |
| "DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS"); |
| @SuppressWarnings("unchecked") |
| T result = (T) ctxt.handleUnexpectedToken(getValueType(ctxt), p.getCurrentToken(), p, msg); |
| return result; |
| } |
| return (T) deserialize(p, ctxt); |
| } |
| |
| /* |
| /**************************************************** |
| /* Helper methods for sub-classes, coercions |
| /**************************************************** |
| */ |
| |
| protected void _failDoubleToIntCoercion(JsonParser p, DeserializationContext ctxt, |
| String type) throws IOException |
| { |
| ctxt.reportInputMismatch(handledType(), |
| "Cannot coerce a floating-point value ('%s') into %s (enable `DeserializationFeature.ACCEPT_FLOAT_AS_INT` to allow)", |
| p.getValueAsString(), type); |
| } |
| |
| /** |
| * Helper method called in case where an integral number is encountered, but |
| * config settings suggest that a coercion may be needed to "upgrade" |
| * {@link java.lang.Number} into "bigger" type like {@link java.lang.Long} or |
| * {@link java.math.BigInteger} |
| * |
| * @see DeserializationFeature#USE_BIG_INTEGER_FOR_INTS |
| * @see DeserializationFeature#USE_LONG_FOR_INTS |
| * |
| * @since 2.6 |
| */ |
| protected Object _coerceIntegral(JsonParser p, DeserializationContext ctxt) throws IOException |
| { |
| int feats = ctxt.getDeserializationFeatures(); |
| if (DeserializationFeature.USE_BIG_INTEGER_FOR_INTS.enabledIn(feats)) { |
| return p.getBigIntegerValue(); |
| } |
| if (DeserializationFeature.USE_LONG_FOR_INTS.enabledIn(feats)) { |
| return p.getLongValue(); |
| } |
| return p.getBigIntegerValue(); // should be optimal, whatever it is |
| } |
| |
| /** |
| * Method to call when JSON `null` token is encountered. Note: only called when |
| * this deserializer encounters it but NOT when reached via property |
| * |
| * @since 2.9 |
| */ |
| protected Object _coerceNullToken(DeserializationContext ctxt, boolean isPrimitive) throws JsonMappingException |
| { |
| if (isPrimitive) { |
| _verifyNullForPrimitive(ctxt); |
| } |
| return getNullValue(ctxt); |
| } |
| |
| /** |
| * Method called when JSON String with value "null" is encountered. |
| * |
| * @since 2.9 |
| */ |
| protected Object _coerceTextualNull(DeserializationContext ctxt, boolean isPrimitive) throws JsonMappingException |
| { |
| Enum<?> feat; |
| boolean enable; |
| |
| if (!ctxt.isEnabled(MapperFeature.ALLOW_COERCION_OF_SCALARS)) { |
| feat = MapperFeature.ALLOW_COERCION_OF_SCALARS; |
| enable = true; |
| } else if (isPrimitive && ctxt.isEnabled(DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES)) { |
| feat = DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES; |
| enable = false; |
| } else { |
| return getNullValue(ctxt); |
| } |
| _reportFailedNullCoerce(ctxt, enable, feat, "String \"null\""); |
| return null; |
| } |
| |
| /** |
| * Method called when JSON String with value "" (that is, zero length) is encountered. |
| * |
| * @since 2.9 |
| */ |
| protected Object _coerceEmptyString(DeserializationContext ctxt, boolean isPrimitive) throws JsonMappingException |
| { |
| Enum<?> feat; |
| boolean enable; |
| |
| if (!ctxt.isEnabled(MapperFeature.ALLOW_COERCION_OF_SCALARS)) { |
| feat = MapperFeature.ALLOW_COERCION_OF_SCALARS; |
| enable = true; |
| } else if (isPrimitive && ctxt.isEnabled(DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES)) { |
| feat = DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES; |
| enable = false; |
| } else { |
| return getNullValue(ctxt); |
| } |
| _reportFailedNullCoerce(ctxt, enable, feat, "empty String (\"\")"); |
| return null; |
| } |
| |
| // @since 2.9 |
| protected final void _verifyNullForPrimitive(DeserializationContext ctxt) throws JsonMappingException |
| { |
| if (ctxt.isEnabled(DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES)) { |
| ctxt.reportInputMismatch(this, |
| "Cannot coerce `null` %s (disable `DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES` to allow)", |
| _coercedTypeDesc()); |
| } |
| } |
| |
| // NOTE: only for primitive Scalars |
| // @since 2.9 |
| protected final void _verifyNullForPrimitiveCoercion(DeserializationContext ctxt, String str) throws JsonMappingException |
| { |
| Enum<?> feat; |
| boolean enable; |
| |
| if (!ctxt.isEnabled(MapperFeature.ALLOW_COERCION_OF_SCALARS)) { |
| feat = MapperFeature.ALLOW_COERCION_OF_SCALARS; |
| enable = true; |
| } else if (ctxt.isEnabled(DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES)) { |
| feat = DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES; |
| enable = false; |
| } else { |
| return; |
| } |
| String strDesc = str.isEmpty() ? "empty String (\"\")" : String.format("String \"%s\"", str); |
| _reportFailedNullCoerce(ctxt, enable, feat, strDesc); |
| } |
| |
| // NOTE: for non-primitive Scalars |
| // @since 2.9 |
| protected final void _verifyNullForScalarCoercion(DeserializationContext ctxt, String str) throws JsonMappingException |
| { |
| if (!ctxt.isEnabled(MapperFeature.ALLOW_COERCION_OF_SCALARS)) { |
| String strDesc = str.isEmpty() ? "empty String (\"\")" : String.format("String \"%s\"", str); |
| _reportFailedNullCoerce(ctxt, true, MapperFeature.ALLOW_COERCION_OF_SCALARS, strDesc); |
| } |
| } |
| |
| // @since 2.9 |
| protected void _verifyStringForScalarCoercion(DeserializationContext ctxt, String str) throws JsonMappingException |
| { |
| MapperFeature feat = MapperFeature.ALLOW_COERCION_OF_SCALARS; |
| if (!ctxt.isEnabled(feat)) { |
| ctxt.reportInputMismatch(this, "Cannot coerce String \"%s\" %s (enable `%s.%s` to allow)", |
| str, _coercedTypeDesc(), feat.getClass().getSimpleName(), feat.name()); |
| } |
| } |
| |
| // @since 2.9 |
| protected void _verifyNumberForScalarCoercion(DeserializationContext ctxt, JsonParser p) throws IOException |
| { |
| MapperFeature feat = MapperFeature.ALLOW_COERCION_OF_SCALARS; |
| if (!ctxt.isEnabled(feat)) { |
| // 31-Mar-2017, tatu: Since we don't know (or this deep, care) about exact type, |
| // access as a String: may require re-encoding by parser which should be fine |
| String valueDesc = p.getText(); |
| ctxt.reportInputMismatch(this, "Cannot coerce Number (%s) %s (enable `%s.%s` to allow)", |
| valueDesc, _coercedTypeDesc(), feat.getClass().getSimpleName(), feat.name()); |
| } |
| } |
| |
| protected void _reportFailedNullCoerce(DeserializationContext ctxt, boolean state, Enum<?> feature, |
| String inputDesc) throws JsonMappingException |
| { |
| String enableDesc = state ? "enable" : "disable"; |
| ctxt.reportInputMismatch(this, "Cannot coerce %s to Null value %s (%s `%s.%s` to allow)", |
| inputDesc, _coercedTypeDesc(), enableDesc, feature.getClass().getSimpleName(), feature.name()); |
| } |
| |
| /** |
| * Helper method called to get a description of type into which a scalar value coercion |
| * is (most likely) being applied, to be used for constructing exception messages |
| * on coerce failure. |
| * |
| * @return Message with backtick-enclosed name of type this deserializer supports |
| * |
| * @since 2.9 |
| */ |
| protected String _coercedTypeDesc() { |
| boolean structured; |
| String typeDesc; |
| |
| JavaType t = getValueType(); |
| if ((t != null) && !t.isPrimitive()) { |
| structured = (t.isContainerType() || t.isReferenceType()); |
| // 21-Jul-2017, tatu: Probably want to change this (JavaType.toString() not very good) but... |
| typeDesc = "'"+t.toString()+"'"; |
| } else { |
| Class<?> cls = handledType(); |
| structured = cls.isArray() || Collection.class.isAssignableFrom(cls) |
| || Map.class.isAssignableFrom(cls); |
| typeDesc = ClassUtil.nameOf(cls); |
| } |
| if (structured) { |
| return "as content of type "+typeDesc; |
| } |
| return "for type "+typeDesc; |
| } |
| |
| /* |
| /**************************************************** |
| /* Helper methods for sub-classes, resolving dependencies |
| /**************************************************** |
| */ |
| |
| /** |
| * Helper method used to locate deserializers for properties the |
| * type this deserializer handles contains (usually for properties of |
| * bean types) |
| * |
| * @param type Type of property to deserialize |
| * @param property Actual property object (field, method, constuctor parameter) used |
| * for passing deserialized values; provided so deserializer can be contextualized if necessary |
| */ |
| protected JsonDeserializer<Object> findDeserializer(DeserializationContext ctxt, |
| JavaType type, BeanProperty property) |
| throws JsonMappingException |
| { |
| return ctxt.findContextualValueDeserializer(type, property); |
| } |
| |
| /** |
| * Helper method to check whether given text refers to what looks like a clean simple |
| * integer number, consisting of optional sign followed by a sequence of digits. |
| */ |
| protected final boolean _isIntNumber(String text) |
| { |
| final int len = text.length(); |
| if (len > 0) { |
| char c = text.charAt(0); |
| // skip leading sign (plus not allowed for strict JSON numbers but...) |
| int i = (c == '-' || c == '+') ? 1 : 0; |
| for (; i < len; ++i) { |
| int ch = text.charAt(i); |
| if (ch > '9' || ch < '0') { |
| return false; |
| } |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| /* |
| /********************************************************** |
| /* Helper methods for: deserializer construction |
| /********************************************************** |
| */ |
| |
| /** |
| * Helper method that can be used to see if specified property has annotation |
| * indicating that a converter is to be used for contained values (contents |
| * of structured types; array/List/Map values) |
| * |
| * @param existingDeserializer (optional) configured content |
| * serializer if one already exists. |
| * |
| * @since 2.2 |
| */ |
| protected JsonDeserializer<?> findConvertingContentDeserializer(DeserializationContext ctxt, |
| BeanProperty prop, JsonDeserializer<?> existingDeserializer) |
| throws JsonMappingException |
| { |
| final AnnotationIntrospector intr = ctxt.getAnnotationIntrospector(); |
| if (_neitherNull(intr, prop)) { |
| AnnotatedMember member = prop.getMember(); |
| if (member != null) { |
| Object convDef = intr.findDeserializationContentConverter(member); |
| if (convDef != null) { |
| Converter<Object,Object> conv = ctxt.converterInstance(prop.getMember(), convDef); |
| JavaType delegateType = conv.getInputType(ctxt.getTypeFactory()); |
| if (existingDeserializer == null) { |
| existingDeserializer = ctxt.findContextualValueDeserializer(delegateType, prop); |
| } |
| return new StdDelegatingDeserializer<Object>(conv, delegateType, existingDeserializer); |
| } |
| } |
| } |
| return existingDeserializer; |
| } |
| |
| /* |
| /********************************************************** |
| /* Helper methods for: accessing contextual config settings |
| /********************************************************** |
| */ |
| |
| /** |
| * Helper method that may be used to find if this deserializer has specific |
| * {@link JsonFormat} settings, either via property, or through type-specific |
| * defaulting. |
| * |
| * @param typeForDefaults Type (erased) used for finding default format settings, if any |
| * |
| * @since 2.7 |
| */ |
| protected JsonFormat.Value findFormatOverrides(DeserializationContext ctxt, |
| BeanProperty prop, Class<?> typeForDefaults) |
| { |
| if (prop != null) { |
| return prop.findPropertyFormat(ctxt.getConfig(), typeForDefaults); |
| } |
| // even without property or AnnotationIntrospector, may have type-specific defaults |
| return ctxt.getDefaultPropertyFormat(typeForDefaults); |
| } |
| |
| /** |
| * Convenience method that uses {@link #findFormatOverrides} to find possible |
| * defaults and/of overrides, and then calls |
| * <code>JsonFormat.Value.getFeature(feat)</code> |
| * to find whether that feature has been specifically marked as enabled or disabled. |
| * |
| * @param typeForDefaults Type (erased) used for finding default format settings, if any |
| * |
| * @since 2.7 |
| */ |
| protected Boolean findFormatFeature(DeserializationContext ctxt, |
| BeanProperty prop, Class<?> typeForDefaults, JsonFormat.Feature feat) |
| { |
| JsonFormat.Value format = findFormatOverrides(ctxt, prop, typeForDefaults); |
| if (format != null) { |
| return format.getFeature(feat); |
| } |
| return null; |
| } |
| |
| /** |
| * Method called to find {@link NullValueProvider} for a primary property, using |
| * "value nulls" setting. If no provider found (not defined, or is "skip"), |
| * will return `null`. |
| * |
| * @since 2.9 |
| */ |
| protected final NullValueProvider findValueNullProvider(DeserializationContext ctxt, |
| SettableBeanProperty prop, PropertyMetadata propMetadata) |
| throws JsonMappingException |
| { |
| if (prop != null) { |
| return _findNullProvider(ctxt, prop, propMetadata.getValueNulls(), |
| prop.getValueDeserializer()); |
| } |
| return null; |
| } |
| |
| /** |
| * Method called to find {@link NullValueProvider} for a contents of a structured |
| * primary property (Collection, Map, array), using |
| * "content nulls" setting. If no provider found (not defined), |
| * will return given value deserializer (which is a null value provider itself). |
| * |
| * @since 2.9 |
| */ |
| protected NullValueProvider findContentNullProvider(DeserializationContext ctxt, |
| BeanProperty prop, JsonDeserializer<?> valueDeser) |
| throws JsonMappingException |
| { |
| final Nulls nulls = findContentNullStyle(ctxt, prop); |
| if (nulls == Nulls.SKIP) { |
| return NullsConstantProvider.skipper(); |
| } |
| NullValueProvider prov = _findNullProvider(ctxt, prop, nulls, valueDeser); |
| if (prov != null) { |
| return prov; |
| } |
| return valueDeser; |
| } |
| |
| protected Nulls findContentNullStyle(DeserializationContext ctxt, BeanProperty prop) |
| throws JsonMappingException |
| { |
| if (prop != null) { |
| return prop.getMetadata().getContentNulls(); |
| } |
| return null; |
| } |
| |
| // @since 2.9 |
| protected final NullValueProvider _findNullProvider(DeserializationContext ctxt, |
| BeanProperty prop, Nulls nulls, JsonDeserializer<?> valueDeser) |
| throws JsonMappingException |
| { |
| if (nulls == Nulls.FAIL) { |
| if (prop == null) { |
| return NullsFailProvider.constructForRootValue(ctxt.constructType(valueDeser.handledType())); |
| } |
| return NullsFailProvider.constructForProperty(prop); |
| } |
| if (nulls == Nulls.AS_EMPTY) { |
| // cannot deal with empty values if there is no value deserializer that |
| // can indicate what "empty value" is: |
| if (valueDeser == null) { |
| return null; |
| } |
| |
| // Let's first do some sanity checking... |
| // NOTE: although we could use `ValueInstantiator.Gettable` in general, |
| // let's not since that would prevent being able to use custom impls: |
| if (valueDeser instanceof BeanDeserializerBase) { |
| ValueInstantiator vi = ((BeanDeserializerBase) valueDeser).getValueInstantiator(); |
| if (!vi.canCreateUsingDefault()) { |
| final JavaType type = prop.getType(); |
| ctxt.reportBadDefinition(type, |
| String.format("Cannot create empty instance of %s, no default Creator", type)); |
| } |
| } |
| // Second: can with pre-fetch value? |
| { |
| AccessPattern access = valueDeser.getEmptyAccessPattern(); |
| if (access == AccessPattern.ALWAYS_NULL) { |
| return NullsConstantProvider.nuller(); |
| } |
| if (access == AccessPattern.CONSTANT) { |
| return NullsConstantProvider.forValue(valueDeser.getEmptyValue(ctxt)); |
| } |
| } |
| return new NullsAsEmptyProvider(valueDeser); |
| } |
| if (nulls == Nulls.SKIP) { |
| return NullsConstantProvider.skipper(); |
| } |
| return null; |
| } |
| |
| /* |
| /********************************************************** |
| /* Helper methods for sub-classes, problem reporting |
| /********************************************************** |
| */ |
| |
| /** |
| * Method called to deal with a property that did not map to a known |
| * Bean property. Method can deal with the problem as it sees fit (ignore, |
| * throw exception); but if it does return, it has to skip the matching |
| * Json content parser has. |
| * |
| * @param p Parser that points to value of the unknown property |
| * @param ctxt Context for deserialization; allows access to the parser, |
| * error reporting functionality |
| * @param instanceOrClass Instance that is being populated by this |
| * deserializer, or if not known, Class that would be instantiated. |
| * If null, will assume type is what {@link #getValueClass} returns. |
| * @param propName Name of the property that cannot be mapped |
| */ |
| protected void handleUnknownProperty(JsonParser p, DeserializationContext ctxt, |
| Object instanceOrClass, String propName) |
| throws IOException |
| { |
| if (instanceOrClass == null) { |
| instanceOrClass = handledType(); |
| } |
| // Maybe we have configured handler(s) to take care of it? |
| if (ctxt.handleUnknownProperty(p, this, instanceOrClass, propName)) { |
| return; |
| } |
| /* But if we do get this far, need to skip whatever value we |
| * are pointing to now (although handler is likely to have done that already) |
| */ |
| p.skipChildren(); |
| } |
| |
| protected void handleMissingEndArrayForSingle(JsonParser p, DeserializationContext ctxt) |
| throws IOException |
| { |
| ctxt.reportWrongTokenException(this, JsonToken.END_ARRAY, |
| "Attempted to unwrap '%s' value from an array (with `DeserializationFeature.UNWRAP_SINGLE_VALUE_ARRAYS`) but it contains more than one value", |
| handledType().getName()); |
| // 05-May-2016, tatu: Should recover somehow (maybe skip until END_ARRAY); |
| // but for now just fall through |
| } |
| |
| protected void _verifyEndArrayForSingle(JsonParser p, DeserializationContext ctxt) throws IOException |
| { |
| JsonToken t = p.nextToken(); |
| if (t != JsonToken.END_ARRAY) { |
| handleMissingEndArrayForSingle(p, ctxt); |
| } |
| } |
| |
| /* |
| /********************************************************** |
| /* Helper methods, other |
| /********************************************************** |
| */ |
| |
| /** |
| * @since 2.9 |
| */ |
| protected final static boolean _neitherNull(Object a, Object b) { |
| return (a != null) && (b != null); |
| } |
| |
| /** |
| * @since 2.9 |
| */ |
| protected final boolean _byteOverflow(int value) { |
| // 07-nov-2016, tatu: We support "unsigned byte" as well |
| // as Java signed range since that's relatively common usage |
| return (value < Byte.MIN_VALUE || value > 255); |
| } |
| |
| /** |
| * @since 2.9 |
| */ |
| protected final boolean _shortOverflow(int value) { |
| return (value < Short.MIN_VALUE || value > Short.MAX_VALUE); |
| } |
| |
| /** |
| * @since 2.9 |
| */ |
| protected final boolean _intOverflow(long value) { |
| return (value < Integer.MIN_VALUE || value > Integer.MAX_VALUE); |
| } |
| |
| /** |
| * @since 2.9 |
| */ |
| protected Number _nonNullNumber(Number n) { |
| if (n == null) { |
| n = Integer.valueOf(0); |
| } |
| return n; |
| } |
| } |
