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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 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
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
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 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
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 */
package org.glassfish.admin.amx.logging;

import org.glassfish.admin.amx.util.ArrayUtil;
import org.glassfish.admin.amx.util.ObjectUtil;

import java.io.Serializable;
import java.util.List;
import org.glassfish.external.arc.Stability;
import org.glassfish.external.arc.Taxonomy;

/**
 * INTERNAL USE ONLY--not part of the API
 *
 * @since AS 9.0
 */
@Taxonomy(stability = Stability.EXPERIMENTAL)
public final class LogQueryResultImpl implements LogQueryResult {

    private final String[] mFieldNames;
    private final LogQueryEntry[] mEntries;

    public LogQueryResultImpl(final String[] fieldNames, final LogQueryEntry[] entries) {
        mFieldNames = fieldNames;
        mEntries = entries;
    }

    /**
     * Instantiate using result from {@link Logging#queryServerLog}. The first Object[] is a String[] of the field names. Subsequent Object[] are the data
     * values.
     */
    public LogQueryResultImpl(final List records) {
        mFieldNames = (String[]) records.get(0);

        mEntries = new LogQueryEntry[records.size() - 1];
        for (int i = 0; i < mEntries.length; ++i) {
            mEntries[i] = new LogQueryEntryImpl(records.get(i + 1));
        }
    }

    @Override
    public String[] getFieldNames() {
        return mFieldNames;
    }

    @Override
    public LogQueryEntry[] getEntries() {
        return mEntries;
    }

    private static final String FIELD_DELIM = "\t";
    private static final String NEWLINE = System.getProperty("line.separator");

    ;
    /**
        Output a tab-delimited String with a header line. Each
        subsequent line represents another log record.
     */
    @Override
    public String toString() {
        final StringBuilder builder = new StringBuilder();

        for (final String s : getFieldNames()) {
            builder.append(s);
            builder.append(FIELD_DELIM);
        }
        builder.replace(builder.length() - 1, builder.length(), NEWLINE);

        for (final LogQueryEntry entry : getEntries()) {
            final Object[] fields = entry.getFields();
            for (final Object o : fields) {
                builder.append(o.toString());
                builder.append(FIELD_DELIM);
            }
            builder.replace(builder.length() - 1, builder.length(), NEWLINE);
        }

        return builder.toString();
    }

    @Override
    public int hashCode() {
        return ObjectUtil.hashCode(getFieldNames(), getEntries());
    }

    @Override
    public boolean equals(final Object rhs) {
        boolean equal = rhs instanceof LogQueryResult;

        if (equal) {
            final LogQueryResult r = (LogQueryResult) rhs;

            equal = ArrayUtil.arraysEqual(getFieldNames(), r.getFieldNames())
                    && ArrayUtil.arraysEqual(getEntries(), r.getEntries());

        }

        return equal;
    }

}