org.codehaus.jackson.map.introspect.AnnotatedConstructor Maven / Gradle / Ivy

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Data Mapper package is a high-performance data binding package built on Jackson JSON processor
There is a newer version: 1.9.13
package org.codehaus.jackson.map.introspect;

import java.lang.reflect.Constructor;
import java.lang.reflect.Member;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;

import org.codehaus.jackson.map.type.TypeBindings;
import org.codehaus.jackson.map.type.TypeFactory;
import org.codehaus.jackson.type.JavaType;

public final class AnnotatedConstructor
    extends AnnotatedWithParams
{
    protected final Constructor _constructor;

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

    public AnnotatedConstructor(Constructor constructor,
                                AnnotationMap classAnn, AnnotationMap[] paramAnn)
    {
        super(classAnn, paramAnn);
        if (constructor == null) {
            throw new IllegalArgumentException("Null constructor not allowed");
        }
        _constructor = constructor;
    }

    /*
    /**********************************************************
    /* Annotated impl
    /**********************************************************
     */

    @Override
    public Constructor getAnnotated() { return _constructor; }

    @Override
    public int getModifiers() { return _constructor.getModifiers(); }

    @Override
    public String getName() { return _constructor.getName(); }

    @Override
    public Type getGenericType() {
        return getRawType();
    }

    @Override
    public Class getRawType() {
        return _constructor.getDeclaringClass();
    }

    // note: copied verbatim from AnnotatedMethod; hard to generalize
    /**
     * As per [JACKSON-468], we need to also allow declaration of local
     * type bindings; mostly it will allow defining bounds.
     */
    @Override
    public JavaType getType(TypeBindings bindings)
    {
        TypeVariable[] localTypeParams = _constructor.getTypeParameters();
        // [JACKSON-468] Need to consider local type binding declarations too...
        if (localTypeParams != null && localTypeParams.length > 0) {
            bindings = bindings.childInstance();
            for (TypeVariable var : localTypeParams) {
                String name = var.getName();
                // to prevent infinite loops, need to first add placeholder (">" etc)
                bindings._addPlaceholder(name);
                // About only useful piece of information is the lower bound (which is at least Object.class)
                Type lowerBound = var.getBounds()[0];
                JavaType type = (lowerBound == null) ? TypeFactory.fastSimpleType(Object.class)
                        : TypeFactory.type(lowerBound, bindings);
                bindings.addBinding(var.getName(), type);
            }
        }
        return TypeFactory.type(getGenericType(), bindings);
    }
    
    /*
    /**********************************************************
    /* Extended API
    /**********************************************************
     */

    @Override
    public AnnotatedParameter getParameter(int index) {
        return new AnnotatedParameter(this, getParameterType(index), _paramAnnotations[index]);
    }

    @Override
    public int getParameterCount() {
        return _constructor.getParameterTypes().length;
    }

    @Override
    public Class getParameterClass(int index)
    {
        Class[] types = _constructor.getParameterTypes();
        return (index >= types.length) ? null : types[index];
    }

    @Override
    public Type getParameterType(int index)
    {
        Type[] types = _constructor.getGenericParameterTypes();
        return (index >= types.length) ? null : types[index];
    }

    /*
    /**********************************************************
    /* AnnotatedMember impl
    /**********************************************************
     */

    @Override
    public Class getDeclaringClass() { return _constructor.getDeclaringClass(); }

    @Override
    public Member getMember() { return _constructor; }

    /*
    /**********************************************************
    /* Extended API, specific annotations
    /**********************************************************
     */

    @Override
    public String toString() {
        return "[constructor for "+getName()+", annotations: "+_annotations+"]";
    }
}