/*
* Copyright (c) 2013, 2015 Cisco Systems, Inc. and others. 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
*/
package org.opendaylight.controller.config.yangjmxgenerator.plugin.util;
import com.google.common.base.Joiner;
import com.google.common.base.Optional;
import com.google.common.base.Splitter;
import com.google.common.base.Strings;
import java.util.List;
import java.util.regex.Pattern;
import org.apache.commons.lang3.StringUtils;
import org.opendaylight.controller.config.yangjmxgenerator.plugin.java.FullyQualifiedName;
public final class StringUtil {
private StringUtil() {
throw new UnsupportedOperationException();
}
/**
* @param list of strings to be joined by ','
* @param prefix e.g. 'extends' or 'implements'
*/
public static String prefixAndJoin(final List<FullyQualifiedName> list, final String prefix) {
if (list.isEmpty()) {
return "";
}
Joiner joiner = Joiner.on(",");
return " " + prefix + " " + joiner.join(list);
}
public static String addAsterixAtEachLineStart(final String input) {
String s = Pattern.compile("^", Pattern.MULTILINE).matcher(input).replaceAll("* ");
// remove trailing spaces
s = Pattern.compile("\\s+$", Pattern.MULTILINE).matcher(s).replaceAll("");
s = ensureEndsWithSingleNewLine(s);
return s;
}
private static String ensureEndsWithSingleNewLine(String s) {
// .split Only trailing empty strings are skipped.
String[] split = s.split("\n");
s = Joiner.on("\n").join(split);
s = s + "\n";
return s;
}
public static String writeComment(final String input, final boolean isJavadoc) {
StringBuilder content = new StringBuilder();
content.append("/*");
if (isJavadoc) {
content.append("*");
}
content.append("\n");
content.append(addAsterixAtEachLineStart(input));
content.append("*/\n");
return content.toString();
}
public static Optional<String> loadCopyright() {
/*
* FIXME: BUG-980: this is a nice feature, but the copyright needs to come
* from the project being processed, not this one.
try (InputStream in = StringUtil.class.getResourceAsStream("/copyright.txt")) {
if (in != null) {
return Optional.of(IOUtils.toString(in));
}
} catch (IOException e) {
LOG.warn("Cannot load copyright.txt", e);
}
*/
return Optional.absent();
}
public static String formatJavaSource(final String input) {
Iterable<String> split = Splitter.on("\n").trimResults().split(input);
int basicIndent = 4;
StringBuilder sb = new StringBuilder();
int indents = 0, empty = 0;
for (String line : split) {
indents -= StringUtils.countMatches(line, "}");
if (indents < 0) {
indents = 0;
}
if (!line.isEmpty()) {
sb.append(Strings.repeat(" ", basicIndent * indents));
sb.append(line);
sb.append("\n");
empty = 0;
} else {
empty++; // one empty line is allowed
if (empty < 2) {
sb.append("\n");
}
}
indents += StringUtils.countMatches(line, "{");
}
return ensureEndsWithSingleNewLine(sb.toString());
}
}