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RtYamlPrinter.java
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RtYamlPrinter.java
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/**
* Copyright (c) 2016-2024, Mihai Emil Andronache
* All rights reserved.
* <p>
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
package com.amihaiemil.eoyaml;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
/**
* Base implementation of YamlPrinter. "Rt" stands for "Runtime".
* @author Mihai Andronache (amihaiemil@gmail.com)
* @version $Id$
* @since 4.3.1
*/
final class RtYamlPrinter implements YamlPrinter {
/**
* Writer where the given YAML will be printed.
*/
private final Writer writer;
/**
* Line separator.
*/
private final String lineSeparator;
/**
* Print all the nodes in block-style.
*/
private final boolean alwaysBlock;
/**
* Constructor.
* @param writer Destination writer.
*/
RtYamlPrinter(final Writer writer) {
this(writer, false);
}
/**
* Constructor.
* @param writer Destination writer.
* @param alwaysBlock Print all the nodes in block-style.
*/
RtYamlPrinter(final Writer writer, final boolean alwaysBlock) {
this(writer, System.lineSeparator(), alwaysBlock);
}
/**
* Constructor.
* @param writer Destination writer.
* @param lineSeparator Line separator.
*/
RtYamlPrinter(final Writer writer, final String lineSeparator) {
this(writer, lineSeparator, false);
}
/**
* Constructor.
* @param writer Destination writer.
* @param lineSeparator Line separator.
* @param alwaysBlock Print all the nodes in block-style.
*/
RtYamlPrinter(
final Writer writer,
final String lineSeparator,
final boolean alwaysBlock
) {
this.writer = writer;
this.lineSeparator = lineSeparator;
this.alwaysBlock = alwaysBlock;
}
@Override
public void print(final YamlNode node) throws IOException {
try {
final YamlVisitor<String> visitor = new YamlPrintVisitor(
this.lineSeparator, this.alwaysBlock
);
if (node.type().equals(Node.SCALAR)) {
this.writer.append("---")
.append(this.lineSeparator)
.append(printPossibleComment(node))
.append(node.accept(visitor))
.append(this.lineSeparator)
.append("...");
} else {
final String comment = printPossibleComment(node);
this.writer.append(comment);
if (!comment.isEmpty()) {
this.writer.append("---").append(this.lineSeparator);
}
this.writer.append(node.accept(visitor));
}
} finally {
this.writer.close();
}
}
/**
* Print a comment. Make sure to split the lines if there are more
* lines separated by NewLine and also add a '# ' in front of each
* line.
* @param node Node containing the Comment.
* @return Printed comment.
*/
private String printPossibleComment(final YamlNode node) {
final StringWriter wrtr = new StringWriter();
if(node != null && node.comment() != null) {
final Comment tmpComment;
if(node.comment() instanceof ScalarComment) {
tmpComment = ((ScalarComment) node.comment()).above();
} else {
tmpComment = node.comment();
}
final String com = tmpComment.value();
if (com.trim().length() != 0) {
String[] lines = com.split(this.lineSeparator);
for (final String line : lines) {
wrtr
.append("# ")
.append(line)
.append(this.lineSeparator);
}
}
}
return wrtr.toString();
}
}