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/*******************************************************************************
* Copyright (c) 2009, 2019 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.core.test.validation;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jacoco.core.analysis.IBundleCoverage;
import org.jacoco.core.analysis.IClassCoverage;
import org.jacoco.core.analysis.ICoverageNode;
import org.jacoco.core.analysis.ILine;
import org.jacoco.core.analysis.IPackageCoverage;
import org.jacoco.core.analysis.ISourceFileCoverage;
/**
* Reads a single source file and allows access to its line coverage.
*/
public class Source {
private static final String SRC_LOCATION = "src/";
private static final String SRC_ENCODING = "UTF-8";
private static final Pattern COMMENT_PATTERN = Pattern
.compile("(?<!https?:)//(.*)");
/**
* Represents a single line in a source file.
*/
public class Line {
private final int nr;
private final String text;
private final ILine coverage;
private Line(int nr, String text, ILine coverage) {
this.nr = nr;
this.text = text;
this.coverage = coverage;
}
public int getNr() {
return nr;
}
public String getText() {
return text;
}
public ILine getCoverage() {
return coverage;
}
/**
* @return the text of a single line comment if present or
* <code>null</code>
*/
public String getComment() {
final Matcher matcher = COMMENT_PATTERN.matcher(text);
return matcher.find() ? matcher.group(1) : null;
}
@Override
public String toString() {
return Source.this.coverage.getName() + ":" + nr;
}
}
private final List<Line> lines;
private final ISourceFileCoverage coverage;
/**
* Reads a source file from the given reader.
*
* @param reader
* the reader to read from, will be closed
* @param coverage
* corresponding coverage data
* @throws IOException
* if an I/O error occurs
*/
public Source(final Reader reader, ISourceFileCoverage coverage)
throws IOException {
this.lines = new ArrayList<Line>();
this.coverage = coverage;
final BufferedReader buffer = new BufferedReader(reader);
int nr = 1;
for (String l = buffer.readLine(); l != null; l = buffer.readLine()) {
lines.add(new Line(nr, l, coverage.getLine(nr)));
nr++;
}
buffer.close();
}
/**
* @return all lines of the source file
*/
public List<Line> getLines() {
return Collections.unmodifiableList(lines);
}
/**
* @return the corresponding coverage node
*/
public ISourceFileCoverage getCoverage() {
return coverage;
}
/**
* Loads the source file which holds the given target class.
*
* @param target
* the target class we want the source for
* @param bundle
* the bundle containing the analyzed class and its source file
* @return a {@link Source} instance
*/
public static Source load(Class<?> target, IBundleCoverage bundle)
throws IOException {
final IPackageCoverage pkgCov = findByName(bundle.getPackages(),
vm(target.getPackage().getName()));
final IClassCoverage clsCov = findByName(pkgCov.getClasses(),
vm(target.getName()));
final ISourceFileCoverage srcCov = findByName(pkgCov.getSourceFiles(),
clsCov.getSourceFileName());
return new Source(open(SRC_LOCATION + pkgCov.getName() + "/"
+ clsCov.getSourceFileName()), srcCov);
}
private static <T extends ICoverageNode> T findByName(Collection<T> nodes,
String name) {
for (T node : nodes) {
if (name.equals(node.getName())) {
return node;
}
}
throw new AssertionError("Node not found: " + name);
}
private static String vm(String javaname) {
return javaname.replace('.', '/');
}
private static Reader open(String file) throws IOException {
return new InputStreamReader(new FileInputStream(file), SRC_ENCODING);
}
}
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