Examples of com.fasterxml.jackson.databind.util.TokenBuffer$Parser

Package com.fasterxml.jackson.databind.util

Examples of com.fasterxml.jackson.databind.util.TokenBuffer$Parser

com.fasterxml.jackson.databind.util.TokenBuffer
Utility class used for efficient storage of {@link JsonToken}sequences, needed for temporary buffering. Space efficient for different sequence lengths (especially so for smaller ones; but not significantly less efficient for larger), highly efficient for linear iteration and appending. Implemented as segmented/chunked linked list of tokens; only modifications are via appends.
Note that before version 2.0, this class was located in the "core" bundle, not data-binding; but since it was only used by data binding, was moved here to reduce size of core package

    {
        // [JACKSON-393] fix:
        final UUID value = UUID.fromString("76e6d183-5f68-4afa-b94a-922c1fdb83f8");


        // first, null should come as null
        TokenBuffer buf = new TokenBuffer(null, false);
        buf.writeObject(null);
        assertNull(MAPPER.readValue(buf.asParser(), UUID.class));
        buf.close();


        // then, UUID itself come as is:
        buf = new TokenBuffer(null, false);
        buf.writeObject(value);
        assertSame(value, MAPPER.readValue(buf.asParser(), UUID.class));


        // and finally from byte[]
        // oh crap; JDK UUID just... sucks. Not even byte[] accessors or constructors? Huh?
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        DataOutputStream out = new DataOutputStream(bytes);
        out.writeLong(value.getMostSignificantBits());
        out.writeLong(value.getLeastSignificantBits());
        byte[] data = bytes.toByteArray();
        assertEquals(16, data.length);
        
        buf.writeObject(data);


        UUID value2 = MAPPER.readValue(buf.asParser(), UUID.class);
        
        assertEquals(value, value2);
        buf.close();
    }

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    {
        URL value = new URL("http://foo.com");
        assertEquals(value, MAPPER.readValue("\""+value.toString()+"\"", URL.class));


        // trivial case; null to null, embedded URL to URL
        TokenBuffer buf = new TokenBuffer(null, false);
        buf.writeObject(null);
        assertNull(MAPPER.readValue(buf.asParser(), URL.class));
        buf.close();


        // then, URLitself come as is:
        buf = new TokenBuffer(null, false);
        buf.writeObject(value);
        assertSame(value, MAPPER.readValue(buf.asParser(), URL.class));
        buf.close();
    }

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            return _deserializeTypedUsingDefaultImpl(jp, ctxt, null);
        } else if (t != JsonToken.FIELD_NAME) {
            return _deserializeTypedUsingDefaultImpl(jp, ctxt, null);
        }
        // Ok, let's try to find the property. But first, need token buffer...
        TokenBuffer tb = null;


        for (; t == JsonToken.FIELD_NAME; t = jp.nextToken()) {
            String name = jp.getCurrentName();
            jp.nextToken(); // to point to the value
            if (_typePropertyName.equals(name)) { // gotcha!
                return _deserializeTypedForId(jp, ctxt, tb);
            }
            if (tb == null) {
                tb = new TokenBuffer(null, false);
            }
            tb.writeFieldName(name);
            tb.copyCurrentStructure(jp);
        }
        return _deserializeTypedUsingDefaultImpl(jp, ctxt, tb);
    }

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    {
        String typeId = jp.getText();
        JsonDeserializer<Object> deser = _findDeserializer(ctxt, typeId);
        if (_typeIdVisible) { // need to merge id back in JSON input?
            if (tb == null) {
                tb = new TokenBuffer(null, false);
            }
            tb.writeFieldName(jp.getCurrentName());
            tb.writeString(typeId);
        }
        if (tb != null) { // need to put back skipped properties?

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    @SuppressWarnings({ "unchecked", "resource" })
    public <T extends JsonNode> T valueToTree(Object fromValue)
        throws IllegalArgumentException
    {
        if (fromValue == null) return null;
        TokenBuffer buf = new TokenBuffer(this, false);
        JsonNode result;
        try {
            writeValue(buf, fromValue);
            JsonParser jp = buf.asParser();
            result = readTree(jp);
            jp.close();
        } catch (IOException e) { // should not occur, no real i/o...
            throw new IllegalArgumentException(e.getMessage(), e);
        }

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        }
        
        /* Then use TokenBuffer, which is a JsonGenerator:
         * (see [JACKSON-175])
         */
        TokenBuffer buf = new TokenBuffer(this, false);
        try {
            // inlined 'writeValue' with minor changes:
            // first: disable wrapping when writing
            SerializationConfig config = getSerializationConfig().without(SerializationFeature.WRAP_ROOT_VALUE);
            // no need to check for closing of TokenBuffer
            _serializerProvider(config).serializeValue(buf, fromValue);


            // then matching read, inlined 'readValue' with minor mods:
            final JsonParser jp = buf.asParser();
            Object result;
            // ok to pass in existing feature flags; unwrapping handled by mapper
            final DeserializationConfig deserConfig = getDeserializationConfig();
            JsonToken t = _initForReading(jp);
            if (t == JsonToken.VALUE_NULL) {

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    @SuppressWarnings("unchecked")
    public <T extends JsonNode> T valueToTree(Object fromValue)
        throws IllegalArgumentException
    {
        if (fromValue == null) return null;
        TokenBuffer buf = new TokenBuffer(this);
        JsonNode result;
        try {
            writeValue(buf, fromValue);
            JsonParser jp = buf.asParser();
            result = readTree(jp);
            jp.close();
        } catch (IOException e) { // should not occur, no real i/o...
            throw new IllegalArgumentException(e.getMessage(), e);
        }

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        // sanity check for null first:
        if (fromValue == null) return null;
        /* Then use TokenBuffer, which is a JsonGenerator:
         * (see [JACKSON-175])
         */
        TokenBuffer buf = new TokenBuffer(this);
        try {
            // inlined 'writeValue' with minor changes:
            // first: disable wrapping when writing
            SerializationConfig config = getSerializationConfig().without(SerializationFeature.WRAP_ROOT_VALUE);
            // no need to check for closing of TokenBuffer
            _serializerProvider(config).serializeValue(buf, fromValue);


            // then matching read, inlined 'readValue' with minor mods:
            final JsonParser jp = buf.asParser();
            Object result;
            // ok to pass in existing feature flags; unwrapping handled by mapper
            final DeserializationConfig deserConfig = getDeserializationConfig();
            JsonToken t = _initForReading(jp);
            if (t == JsonToken.VALUE_NULL) {

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    @SuppressWarnings("unchecked")
    public <T extends JsonNode> T valueToTree(Object fromValue)
        throws IllegalArgumentException
    {
        if (fromValue == null) return null;
        TokenBuffer buf = new TokenBuffer(this);
        JsonNode result;
        try {
            writeValue(buf, fromValue);
            JsonParser jp = buf.asParser();
            result = readTree(jp);
            jp.close();
        } catch (IOException e) { // should not occur, no real i/o...
            throw new IllegalArgumentException(e.getMessage(), e);
        }

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        }
        
        /* Then use TokenBuffer, which is a JsonGenerator:
         * (see [JACKSON-175])
         */
        TokenBuffer buf = new TokenBuffer(this);
        try {
            // inlined 'writeValue' with minor changes:
            // first: disable wrapping when writing
            SerializationConfig config = getSerializationConfig().without(SerializationFeature.WRAP_ROOT_VALUE);
            // no need to check for closing of TokenBuffer
            _serializerProvider(config).serializeValue(buf, fromValue);


            // then matching read, inlined 'readValue' with minor mods:
            final JsonParser jp = buf.asParser();
            Object result;
            // ok to pass in existing feature flags; unwrapping handled by mapper
            final DeserializationConfig deserConfig = getDeserializationConfig();
            JsonToken t = _initForReading(jp);
            if (t == JsonToken.VALUE_NULL) {

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