com.tesora.dve.sql.util.BlobColumnChecker.java Source code

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Here is the source code for com.tesora.dve.sql.util.BlobColumnChecker.java

Source

package com.tesora.dve.sql.util;

/*
 * #%L
 * Tesora Inc.
 * Database Virtualization Engine
 * %%
 * Copyright (C) 2011 - 2014 Tesora Inc.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 * 
 * This program 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import io.netty.util.CharsetUtil;

public class BlobColumnChecker extends ColumnChecker {

    private boolean useFormatedOutput = true;

    public BlobColumnChecker() {
        super();
    }

    public void useFormatedOutput(final boolean enable) {
        this.useFormatedOutput = enable;
    }

    @Override
    public String asString(Object in) {
        if (in == null) {
            return "null";
        }

        // May easily lead to heap exhaustion when handling large result sets.
        if (useFormatedOutput) {
            return asFormattedString(in);
        }

        return new String((byte[]) in, CharsetUtil.ISO_8859_1);
    }

    private String asFormattedString(Object in) {
        byte[] bytes = (byte[]) in;
        StringBuffer buf = new StringBuffer();
        for (int i = 0; i < bytes.length; i++) {
            buf.append(i).append("='").append(bytes[i]).append("' ");
        }

        return buf.toString();
    }

    @Override
    public String debugString(Object in) throws Throwable {
        if (in == null)
            return asString(in);
        byte[] bytes = (byte[]) in;
        String iso = new String(bytes, "ISO-8859-1");
        return asString(in) + ": \"" + iso + "\"";
    }

    @Override
    protected String equalObjects(Object expected, Object actual) {
        byte[] ein = (byte[]) expected;
        byte[] ain = (byte[]) actual;
        if (ein.length != ain.length)
            return "Expected byte array of length " + ein.length + " but found length " + ain.length;
        for (int i = 0; i < ein.length; i++) {
            if (ein[i] != ain[i])
                return "At index " + i + " of byte array expected '" + ein[i] + "' but found '" + ain[i] + "'";
        }
        return null;
    }

}