/*
 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.sun.max.ins.debug.vmlog;

import java.lang.reflect.*;
import java.util.*;

import com.sun.max.program.*;
import com.sun.max.vm.log.*;

/**
 * Factory for custom renderers for {@link VMLogger} arguments.
 * A custom renderer must extend the {@link VMLogArgRenderer} class.
 * Custom render classes must be defined in this package and
 * have name of the form {@code XXXVMLogArgRenderer}, where {@code XXX}
 * is the name of the logger.
 */
public abstract class VMLogArgRendererFactory {

    private static Map<String, VMLogArgRenderer> renderers = new HashMap<String, VMLogArgRenderer>();

    static DefaultVMLogArgRenderer defaultVMLogArgRenderer;

    static VMLogArgRenderer getArgRenderer(String loggerName, VMLogView vmLogView) {
        setDefaultVMLogArgRenderer(vmLogView);
        VMLogArgRenderer result = renderers.get(loggerName);
        if (result == null) {
            try {
                Class<?> klass = Class.forName(VMLogArgRendererFactory.class.getPackage().getName() + "." + loggerName + "VMLogArgRenderer");
                Constructor<?> cons = klass.getDeclaredConstructor(VMLogView.class);
                result = (VMLogArgRenderer) cons.newInstance(vmLogView);
            } catch (Exception ex) {
                Trace.line(1, "no custom VMLog argument renderer found for " + loggerName);
                result =  defaultVMLogArgRenderer;
            }
            renderers.put(loggerName, result);
        }
        return result;
    }

    static void setDefaultVMLogArgRenderer(VMLogView vmLogView) {
        if (defaultVMLogArgRenderer ==  null) {
            defaultVMLogArgRenderer = new DefaultVMLogArgRenderer(vmLogView);
        }
    }
}