com.amihaiemil.eoyaml.ReadYamlMapping Maven / Gradle / Ivy
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YAML for Java 8 and above. Very similar to the JSON-P api.
/**
* Copyright (c) 2016-2020, 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.*;
/**
* YamlMapping read from somewhere. YAML directives and
* document start/end markers are ignored. This is assumed
* to be a plain YAML mapping.
* @author Mihai Andronache ([email protected])
* @version $Id: 3a9ac57024300d919b6466a5eaf61d69ab1065bf $
* @since 1.0.0
*/
final class ReadYamlMapping extends ComparableYamlMapping {
/**
* Lines read.
*/
private YamlLines lines;
/**
* Ctor.
* @param lines Given lines.
*/
ReadYamlMapping(final AllYamlLines lines) {
this.lines = new SameIndentationLevel(
new WellIndented(
new NoDirectivesOrMarkers(
lines
)
)
);
}
@Override
public Collection values() {
final List values = new LinkedList<>();
for(final YamlNode key : this.keys()) {
values.add(this.value(key));
}
return values;
}
@Override
public YamlMapping yamlMapping(final YamlNode key) {
final YamlMapping found;
if(key instanceof Scalar) {
found = this.yamlMapping(((Scalar) key).value());
} else {
final YamlNode value = this.valueOfNodeKey(key);
if(value instanceof YamlMapping) {
found = (YamlMapping) value;
} else {
found = null;
}
}
return found;
}
@Override
public YamlMapping yamlMapping(final String key) {
final YamlMapping found;
final YamlNode value = this.valueOfStringKey(key);
if(value instanceof YamlMapping) {
found = (YamlMapping) value;
} else {
found = null;
}
return found;
}
@Override
public YamlSequence yamlSequence(final YamlNode key) {
final YamlSequence found;
if(key instanceof Scalar) {
found = this.yamlSequence(((Scalar) key).value());
} else {
final YamlNode value = this.valueOfNodeKey(key);
if(value instanceof YamlSequence) {
found = (YamlSequence) value;
} else {
found = null;
}
}
return found;
}
@Override
public YamlSequence yamlSequence(final String key) {
final YamlSequence found;
final YamlNode value = this.valueOfStringKey(key);
if(value instanceof YamlSequence) {
found = (YamlSequence) value;
} else {
found = null;
}
return found;
}
@Override
public String string(final YamlNode key) {
String value = null;
if(key instanceof Scalar) {
value = this.string(((Scalar) key).value());
} else {
boolean foundComplexKey = false;
for (final YamlLine line : this.lines) {
final String trimmed = line.trimmed();
if("?".equals(trimmed)) {
final YamlNode keyNode = this.lines.nested(line.number())
.toYamlNode(line);
if(keyNode.equals(key)) {
foundComplexKey = true;
continue;
}
}
if(foundComplexKey) {
if(trimmed.endsWith(":")) {
break;
}
if(trimmed.startsWith(":")) {
value = trimmed.substring(
trimmed.indexOf(":") + 1
).trim();
break;
}
}
}
}
return value;
}
@Override
public String string(final String key) {
String value = null;
for (final YamlLine line : this.lines) {
final String trimmed = line.trimmed();
if(trimmed.endsWith(key + ":")) {
continue;
}
if(trimmed.startsWith(key + ":")) {
value = trimmed.substring(trimmed.indexOf(":") + 1).trim();
}
}
return value;
}
@Override
public String toString() {
return this.indent(0);
}
/**
* The YamlNode value associated with a String (scalar) key.
* @param key String key.
* @return YamlNode.
*/
private YamlNode valueOfStringKey(final String key) {
YamlNode value = null;
for (final YamlLine line : this.lines) {
final String trimmed = line.trimmed();
if(trimmed.endsWith(key + ":")) {
value = this.lines.nested(line.number()).toYamlNode(line);
}
}
return value;
}
/**
* The YamlNode value associated with a YamlNode key
* (a "complex" key starting with '?').
* @param key YamlNode key.
* @return YamlNode.
*/
private YamlNode valueOfNodeKey(final YamlNode key) {
YamlNode value = null;
for (final YamlLine line : this.lines) {
final String trimmed = line.trimmed();
if("?".equals(trimmed)) {
final YamlLines keyLines = this.lines.nested(
line.number()
);
final YamlNode keyNode = keyLines.toYamlNode(line);
if(keyNode.equals(key)) {
final YamlLine colonLine = this.lines.line(
line.number() + keyLines.lines().size() + 1
);
if(":".equals(colonLine.trimmed())) {
value = this.lines.nested(colonLine.number())
.toYamlNode(colonLine);
}
}
}
}
return value;
}
@Override
public Set keys() {
final Set keys = new TreeSet<>();
for (final YamlLine line : this.lines) {
final String trimmed = line.trimmed();
if(":".equals(trimmed)) {
continue;
} else if ("?".equals(trimmed)) {
keys.add(this.lines.nested(line.number()).toYamlNode(line));
} else {
final String[] parts = trimmed.split(":");
if(parts.length < 2 && !trimmed.endsWith(":")) {
throw new IllegalStateException(
"Expected ':' on line " + line.number()
);
} else {
final String keyPart = trimmed.substring(
0, trimmed.indexOf(":")
).trim();
if(!keyPart.isEmpty()) {
keys.add(
new Scalar(keyPart)
);
}
}
}
}
return keys;
}
@Override
public YamlNode value(final YamlNode key) {
YamlNode value = this.yamlMapping(key);
if(value == null) {
value = this.yamlSequence(key);
if(value == null) {
final String val = this.string(key);
if(val != null) {
value = new Scalar(val);
}
}
}
return value;
}
}
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