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/*******************************************************************************
* Copyright (c) 2009, 2017 Mountainminds GmbH & Co. KG and Contributors
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Marc R. Hoffmann - initial API and implementation
*
*******************************************************************************/
package org.jacoco.report;
import java.io.IOException;
import java.io.Reader;
import java.util.ArrayList;
import java.util.List;
/**
* Locator that searches source files in multiple {@link ISourceFileLocator}
* instances. For each lookup request the first locator that returns a
* {@link Reader} for source content is selected.
*/
public class MultiSourceFileLocator implements ISourceFileLocator {
private final int tabWidth;
private final List<ISourceFileLocator> delegates;
/**
* Creates a new empty locator.
*
* @param tabWidth
* tab width in source files as number of blanks used for all
* source files
*/
public MultiSourceFileLocator(final int tabWidth) {
this.tabWidth = tabWidth;
this.delegates = new ArrayList<ISourceFileLocator>();
}
/**
* Adds the given locator. Locators are queried in the sequence they have
* been added.
*
* @param locator
* Additional locator to query
*/
public void add(final ISourceFileLocator locator) {
delegates.add(locator);
}
public Reader getSourceFile(final String packageName, final String fileName)
throws IOException {
for (final ISourceFileLocator d : delegates) {
final Reader reader = d.getSourceFile(packageName, fileName);
if (reader != null) {
return reader;
}
}
return null;
}
public int getTabWidth() {
return tabWidth;
}
}
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