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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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package org.apache.lucene.util;
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import org.apache.tools.ant.BuildException;
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import org.apache.tools.ant.types.Parameter;
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import org.apache.tools.ant.types.selectors.BaseExtendSelector;
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/** Divides filesets into equal groups */
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public class LuceneJUnitDividingSelector extends BaseExtendSelector {
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/** Number of total parts to split. */
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/** Current part to accept. */
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public void setParameters(Parameter[] pParameters) {
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super.setParameters(pParameters);
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for (int j = 0; j < pParameters.length; j++) {
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Parameter p = pParameters[j];
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if ("divisor".equalsIgnoreCase(p.getName())) {
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divisor = Integer.parseInt(p.getValue());
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else if ("part".equalsIgnoreCase(p.getName())) {
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part = Integer.parseInt(p.getValue());
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throw new BuildException("unknown " + p.getName());
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public void verifySettings() {
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super.verifySettings();
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if (divisor <= 0 || part <= 0) {
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throw new BuildException("part or divisor not set");
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throw new BuildException("part must be <= divisor");
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public boolean isSelected(File dir, String name, File path) {
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counter = counter % divisor + 1;
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return counter == part;