com.amihaiemil.eoyaml.SameIndentationLevel Maven / Gradle / Ivy
/**
* Copyright (c) 2016-2023, Mihai Emil Andronache
* All rights reserved.
*
* 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.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
/**
* SameIndentationLevel. Decorates some YamlLines
* and iterates only over those which are at the same
* indentation level with the first one.
* Use this class as follows:
*
* YamlLines noDirs = new SameIndentationLevel(
* new AllYamlLines(lines)
* ); //Iterates only over the lines which have the same indentation.
*
* @author Mihai Andronache ([email protected])
* @version $Id: e8862ef56287a037c86624915fc493b5793995b4 $
* @since 3.0.2
*/
final class SameIndentationLevel implements YamlLines {
/**
* YamlLines.
*/
private final YamlLines yamlLines;
/**
* Ctor.
* @param yamlLines The Yaml lines.
*/
SameIndentationLevel(final YamlLines yamlLines) {
this.yamlLines = yamlLines;
}
/**
* Returns an iterator over these Yaml lines.
* It only iterates over the lines which are at the same
* level of indentation with the first! It breaks iteration
* when a line with smaller indentation is met since that is the
* beginning of another YAML object.
* @return Iterator over these yaml lines.
*/
@Override
public Iterator iterator() {
Iterator iterator = this.yamlLines.iterator();
if (iterator.hasNext()) {
final List sameIndentation = new ArrayList<>();
final YamlLine first = iterator.next();
sameIndentation.add(first);
int firstIndentation = first.indentation();
boolean firstIsDashMap = this.mappingStartsAtDash(first);
while (iterator.hasNext()) {
YamlLine current = iterator.next();
if (firstIsDashMap
&& this.isMappingEntry(current)
&& current.indentation() == firstIndentation + 2) {
sameIndentation.add(current);
} else if(current.indentation() == firstIndentation) {
sameIndentation.add(current);
} else if (current.indentation() < firstIndentation) {
break;
}
}
iterator = sameIndentation.iterator();
}
return iterator;
}
@Override
public Collection original() {
return this.yamlLines.original();
}
@Override
public YamlNode toYamlNode(final YamlLine prev) {
return this.yamlLines.toYamlNode(prev);
}
/**
* Returns true if there's a YamlMapping starting right after the
* dash, on the same line.
* @param dashLine Line.
* @return True of false.
*/
private boolean mappingStartsAtDash(final YamlLine dashLine) {
final String trimmed = dashLine.trimmed();
final boolean escapedScalar = trimmed.matches("^\\s*-\\s*\".*\"$")
|| trimmed.matches("^\\s*-\\s*'.*'$");
return trimmed.matches("^\\s*-.*:(\\s.*)?$") && !escapedScalar;
}
/**
* Returns true if the line is a mapping entry.
* @param dashLine Line.
* @return True of false.
*/
private boolean isMappingEntry(final YamlLine dashLine) {
final String trimmed = dashLine.trimmed();
final boolean escapedScalar = trimmed.matches("^\\s*\".*\"$")
|| trimmed.matches("^\\s*'.*'$");
return trimmed.matches("^.*:(\\s.*)?$") && !escapedScalar;
}
}