Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".

Jackson Databind Source Code files are provided in the source packge (jackson-databind-2.12.4-sources.jar). You can download it at Jackson Maven Website.

You can also browse Jackson Databind Source Code below:

⏎ com/fasterxml/jackson/databind/deser/UnresolvedId.java

package com.fasterxml.jackson.databind.deser;

import com.fasterxml.jackson.core.JsonLocation;
import com.fasterxml.jackson.databind.util.ClassUtil;

/**
 * Helper class for {@link UnresolvedForwardReference}, to contain information about unresolved ids.
 * 
 * @author pgelinas
 */
public class UnresolvedId {
    private final Object _id;
    private final JsonLocation _location;
    private final Class<?> _type;

    public UnresolvedId(Object id, Class<?> type, JsonLocation where) {
        _id = id;
        _type = type;
        _location = where;
    }
    
    /**
     * The id which is unresolved.
     */
    public Object getId() { return _id; }

    /**
     * The type of object which was expected.
     */
    public Class<?> getType() { return _type; }
    public JsonLocation getLocation() { return _location; }

    @Override
    public String toString() {
        return String.format("Object id [%s] (for %s) at %s", _id,
                ClassUtil.nameOf(_type), _location);
    }
}

⏎ com/fasterxml/jackson/databind/deser/UnresolvedId.java

 

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⇑⇑ Jackson - Java JSON library