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/*
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 *
 * Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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 * language governing permissions and limitations under the License.
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package org.glassfish.admin.amx.util.stringifier;

/**
 * Stringifies an object based on specified interfaces.
 */
public class InterfacesStringifier implements Stringifier {

    private final StringifierRegistry mRegistry;
    private final Class[] mInterfaces;

    public InterfacesStringifier(Class[] interfaces) {
        this(StringifierRegistryImpl.DEFAULT, interfaces);
    }

    public InterfacesStringifier(StringifierRegistry registry, Class[] interfaces) {
        mRegistry = registry;
        mInterfaces = interfaces;
    }

    private  String stringifyAs(Object o, Class theClass) {
        String result = null;
        if (theClass.isAssignableFrom(o.getClass())) {
            final Stringifier stringifier = mRegistry.lookup(theClass);
            if (stringifier != null) {
                result = stringifier.stringify(o);
            }
        }
        return (result);
    }

    @Override
    public String stringify(Object o) {
        StringBuilder result = new StringBuilder();

        for (int i = 0; i < mInterfaces.length; ++i) {
            final Class intf = mInterfaces[i];

            final String s = stringifyAs(o, intf);
            if (s != null) {
                result.append(intf.getName()).append(": ").append(s).append("\n");
            }
        }

        if (result.length() == 0) {
            return o.toString();
        }

        return result.toString();
    }
}