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    • com.fasterxml.jackson.databind.deser.std.ArrayBlockingQueueDeserializer Maven / Gradle / Ivy

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    This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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    package com.fasterxml.jackson.databind.deser.std;

import java.io.IOException;
import java.util.*;
import java.util.concurrent.ArrayBlockingQueue;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.deser.NullValueProvider;
import com.fasterxml.jackson.databind.deser.ValueInstantiator;
import com.fasterxml.jackson.databind.jsontype.TypeDeserializer;

/**
 * We need a custom deserializer both because {@link ArrayBlockingQueue} has no
 * default constructor AND because it has size limit used for constructing
 * underlying storage automatically.
 */
public class ArrayBlockingQueueDeserializer
    extends CollectionDeserializer
{
    private static final long serialVersionUID = 1;

    /*
    /**********************************************************
    /* Life-cycle
    /**********************************************************
     */

     public ArrayBlockingQueueDeserializer(JavaType containerType,
            JsonDeserializer valueDeser, TypeDeserializer valueTypeDeser,
            ValueInstantiator valueInstantiator)
    {
        super(containerType, valueDeser, valueTypeDeser, valueInstantiator);
    }

    /**
     * Constructor used when creating contextualized instances.
     */
     protected ArrayBlockingQueueDeserializer(JavaType containerType,
            JsonDeserializer valueDeser, TypeDeserializer valueTypeDeser,
            ValueInstantiator valueInstantiator,
            JsonDeserializer delegateDeser,
            NullValueProvider nuller, Boolean unwrapSingle)
    {
        super(containerType, valueDeser, valueTypeDeser, valueInstantiator, delegateDeser,
                nuller, unwrapSingle);
    }

    /**
     * Copy-constructor that can be used by sub-classes to allow
     * copy-on-write styling copying of settings of an existing instance.
     */
    protected ArrayBlockingQueueDeserializer(ArrayBlockingQueueDeserializer src) {
        super(src);
    }

    /**
     * Fluent-factory method call to construct contextual instance.
     */
    @Override
    @SuppressWarnings("unchecked")
    protected ArrayBlockingQueueDeserializer withResolved(JsonDeserializer dd,
            JsonDeserializer vd, TypeDeserializer vtd,
            NullValueProvider nuller, Boolean unwrapSingle)
    {
        return new ArrayBlockingQueueDeserializer(_containerType,
                (JsonDeserializer) vd, vtd,
                _valueInstantiator, (JsonDeserializer) dd,
                nuller, unwrapSingle);
    }

    /*
    /**********************************************************
    /* JsonDeserializer API
    /**********************************************************
     */

    @Override
    protected Collection createDefaultInstance(DeserializationContext ctxt)
        throws IOException
    {
        // 07-Nov-2016, tatu: Important: cannot create using default ctor (one
        //    does not exist); and also need to know exact size. Hence, return
        //    null from here
        return null;
    }

    // NOTE: implementation changed between 2.11 and 2.12
    @Override
    protected Collection _deserializeFromArray(JsonParser p, DeserializationContext ctxt,
            Collection result0)
        throws IOException
    {
        if (result0 == null) { // usual case
            result0 = new ArrayList<>();
        }
        result0 = super._deserializeFromArray(p, ctxt, result0);
        if (result0.isEmpty()) {
            return new ArrayBlockingQueue<>(1, false);
        }
        return new ArrayBlockingQueue<>(result0.size(), false, result0);
    }

    @Override
    public Object deserializeWithType(JsonParser p, DeserializationContext ctxt, TypeDeserializer typeDeserializer) throws IOException {
        // In future could check current token... for now this should be enough:
        return typeDeserializer.deserializeTypedFromArray(p, ctxt);
    }
}
    
    
    
    

    




    
    
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