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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2012, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.gatein.api.internal;

import java.util.Arrays;
import java.util.Map;

public class ObjectToStringBuilder {
    private final StringBuilder sb;
    private String sep;

    private ObjectToStringBuilder(Class type) {
        sb = new StringBuilder().append(type.getSimpleName()).append("[");
        sep = "";
    }

    private ObjectToStringBuilder() {
        sb = new StringBuilder("[");
        sep = "";
    }

    public static ObjectToStringBuilder toStringBuilder(Class type) {
        return new ObjectToStringBuilder(type);
    }

    public static ObjectToStringBuilder toStringBuilder() {
        return new ObjectToStringBuilder();
    }

    public ObjectToStringBuilder add(String name, Object object) {
        sb.append(sep).append(name).append("=").append(toString(object));
        sep = ", ";
        return this;
    }

    public ObjectToStringBuilder add(Map map) {
        for (Map.Entry entry : map.entrySet()) {
            add(toString(entry.getKey()), entry.getValue());
        }

        sep = ", ";
        return this;
    }

    private static String toString(Object object) {
        if (object == null)
            return null;
        if (object.getClass().isArray()) {
            return Arrays.toString((Object[]) object);
        } else {
            return object.toString();
        }
    }

    @Override
    public String toString() {
        return sb.append("]").toString();
    }
}