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package com.sun.jersey.api.model;

import com.sun.jersey.spi.container.ParamQualifier;
import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Type;

/**
 * Abstraction for a method/constructor parameter
 */
public class Parameter implements AnnotatedElement {
    
    public enum Source {ENTITY, QUERY, MATRIX, PATH, COOKIE, HEADER, CONTEXT, FORM, UNKNOWN};
    
    private final Annotation[] annotations;
    private final Annotation annotation;
    private final Parameter.Source source;
    private final String sourceName;
    private final boolean encoded;
    private final String defaultValue;
    private final Type type;
    private final Class clazz;
    
    public Parameter(Annotation[] as, Annotation a, Source source, String sourceName, Type type, Class clazz) {
        this(as, a, source, sourceName, type, clazz, false, null);
    }

    public Parameter(Annotation[] as, Annotation a, Source source, String sourceName, Type type, Class clazz, boolean encoded) {
        this(as, a, source, sourceName, type, clazz, encoded, null);
    }

    public Parameter(Annotation[] as, Annotation a, Source source, String sourceName, Type type, Class clazz, String defaultValue) {
        this(as, a, source, sourceName, type, clazz, false, defaultValue);
    }
    
    public Parameter(Annotation[] as, Annotation a, Source source, String sourceName, Type type, Class clazz, boolean encoded, String defaultValue) {
        this.annotations = as;
        this.annotation = a;
        this.source = source;
        this.sourceName = sourceName;
        this.type = type;
        this.clazz = clazz;
        this.encoded = encoded;
        this.defaultValue = defaultValue;
    }

    public Annotation getAnnotation() {
        return annotation;
    }
    
    public Parameter.Source getSource() {
        return source;
    }

    public String getSourceName() {
        return sourceName;
    }

    public boolean isEncoded() {
        return encoded;
    }
    
    public boolean hasDefaultValue() {
        return defaultValue != null;
    }

    public String getDefaultValue() {
        return defaultValue;
    }

    public Class getParameterClass() {
        return clazz;
    }

    public Type getParameterType() {
        return type;
    }

    public boolean isQualified() {
        for (Annotation a : getAnnotations()) {
            if (a.annotationType().isAnnotationPresent(ParamQualifier.class)) {
                return true;
            }
        }
        return false;
    }

    public  T getAnnotation(Class annotationType) {
        for (Annotation a : annotations) {
            if (annotationType == a.annotationType())
                return annotationType.cast(a);
        }
        return null;
    }

    public Annotation[] getAnnotations() {
        return annotations.clone();
    }

    public Annotation[] getDeclaredAnnotations() {
        return annotations.clone();
    }

    public boolean isAnnotationPresent(Class annotationType) {
        return getAnnotation(annotationType) != null;
    }
}