/**
* AnalyzerBeans
* Copyright (C) 2014 Neopost - Customer Information Management
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.eobjects.analyzer.job;
import java.text.DecimalFormat;
import java.util.concurrent.atomic.AtomicInteger;
/**
* A very simple ID generator that generates id with a prefix and an
* incrementing suffix.
*
*
*/
public final class PrefixedIdGenerator implements IdGenerator {
private final String prefix;
private final AtomicInteger counter;
private final String idNumberPattern;
public PrefixedIdGenerator() {
this("");
}
public PrefixedIdGenerator(String prefix) {
this(prefix, 4);
}
public PrefixedIdGenerator(String prefix, int idNumberSize) {
if (idNumberSize <= 0) {
throw new IllegalArgumentException("idNumberSize must be a postive integer");
}
this.prefix = prefix;
this.counter = new AtomicInteger(0);
final StringBuilder sb = new StringBuilder();
for (int i = 0; i < idNumberSize; i++) {
sb.append('0');
}
this.idNumberPattern = sb.toString();
}
@Override
public String nextId() {
int i = counter.incrementAndGet();
DecimalFormat format = new DecimalFormat(idNumberPattern);
return prefix + format.format(i);
}
}