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Created 2 modules: parsley-grammar and parsley-examples

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This commit is contained in:
Alberto Venturini 2021-07-02 13:12:06 +02:00
parent 6be7f76372
commit c9c1454f90
29 changed files with 278032 additions and 57 deletions
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83
parsley-examples/pom.xml Normal file
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>parsley-examples</artifactId>
<packaging>jar</packaging>
<version>0.1.0-SNAPSHOT</version>
<name>parsley-examples</name>
<parent>
<groupId>com.albertoventurini.parsley</groupId>
<artifactId>parsley</artifactId>
<version>0.1.0-SNAPSHOT</version>
</parent>
<url>https://github.com/albertoventurini/parsley</url>
<properties>
<antlr.version>4.7.1</antlr.version>
<junit.version>5.6.1</junit.version>
<maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
<maven-surefire-plugin.version>3.0.0-M5</maven-surefire-plugin.version>
<maven-jar-plugin.version>3.2.0</maven-jar-plugin.version>
<maven-shade.plugin.version>3.2.2</maven-shade.plugin.version>
<mainClass>com.albertoventurini.parsley.Main</mainClass>
</properties>
<dependencies>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.albertoventurini.parsley</groupId>
<artifactId>parsley-grammar</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>11</source>
<target>11</target>
<release>11</release>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<argLine>--enable-preview</argLine>
</configuration>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>${mainClass}</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>

38
parsley-examples/src/main/java/com/albertoventurini/parsley/examples/graphml/Edge.java Normal file
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package com.albertoventurini.parsley.examples.graphml;
import java.util.Map;
public final class Edge {
private final String id;
private final String source;
private final String target;
private final Map<String, String> data;
public Edge(
final String id,
final String source,
final String target,
final Map<String, String> data) {
this.id = id;
this.source = source;
this.target = target;
this.data = data;
}
public String id() {
return id;
}
public String source() {
return source;
}
public String target() {
return target;
}
public Map<String, String> data() {
return data;
}
}

150
parsley-examples/src/main/java/com/albertoventurini/parsley/examples/graphml/GrammarGraphMLParser.java Normal file
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package com.albertoventurini.parsley.examples.graphml;
import com.albertoventurini.parsley.grammar.Grammar;
import com.albertoventurini.parsley.grammar.ParseTree;
import com.albertoventurini.parsley.grammar.rules.Rule;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.List;
import java.util.Map;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.stream.Collectors;
import static com.albertoventurini.parsley.grammar.Grammar.*;
public class GrammarGraphMLParser implements GraphMLParser {
private final Grammar grammar;
public GrammarGraphMLParser() {
final Rule comment = sequence(string("<!--"), until("-->")).as("comment");
final Rule comments = zeroOrMore(comment).as("comments");
final Rule xmlHeader = string("<?xml version='1.0' ?>").as("header");
final Rule attribute = sequence(
takeWhile(c -> c != '=' && c != '>'),
character('='),
character('\''),
takeWhile(c -> c != '\''),
character('\'')).as("attribute");
final Function<String, Rule> tagFunc = (s) -> sequence(
character('<'),
string(s).as("tagName"),
zeroOrMore(attribute).as("attributes"),
character('>')).as("tag:" + s);
final Function<String, Rule> closingTagFunc = (s) -> sequence(
string("</"),
string(s),
character('>')).as("closingTag:" + s);
final BiFunction<String, Rule, Rule> elementFunc = (tagName, content) -> sequence(
tagFunc.apply(tagName).as("tag:" + tagName),
content.as("content"),
closingTagFunc.apply(tagName).as("closingTag:" + tagName));
final Rule data = elementFunc.apply("data", takeWhile(c -> c != '<')).as("dataElem");
final Rule node = elementFunc.apply("node", zeroOrMore(data)).as("nodeElem");
final Rule edge = elementFunc.apply("edge", zeroOrMore(data)).as("edgeElem");
final Rule graph = sequence(
tagFunc.apply("graph"),
oneOrMore(node).as("nodes"),
oneOrMore(edge).as("edges"),
closingTagFunc.apply("graph")).as("graphElem");
final Rule key = sequence(tagFunc.apply("key"), closingTagFunc.apply("key"))
.as("keyElem");
final Rule graphml = sequence(
tagFunc.apply("graphml"),
oneOrMore(key).as("keys"),
graph,
closingTagFunc.apply("graphml")).as("graphmlElem");
final Rule graphmlFile = sequence(
xmlHeader,
comments.discard(),
graphml).as("graphmlFile");
grammar = new Grammar(graphmlFile, null);
}
@Override
public GraphMLParseResult parse(final String filePath) {
try {
return grammar
.parse(Files.readString(Path.of(filePath)))
.map(this::processParseTree)
.orElseThrow(() -> new RuntimeException("Unable to parse graphml file: " + filePath));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
private GraphMLParseResult processParseTree(final ParseTree parseTree) {
final List<Node> nodes = parseTree.getFirstDescendantByName("nodes").map(n ->
n.getChildren()
.stream()
.map(this::processNodeElem)
.collect(Collectors.toList())
).orElseThrow();
final List<Edge> edges = parseTree.getFirstDescendantByName("edges").map(n ->
n.getChildren()
.stream()
.map(this::processEdgeElem)
.collect(Collectors.toList())
).orElseThrow();
return new GraphMLParseResult(nodes, edges);
}
private Node processNodeElem(final ParseTree nodeElem) {
final String id = extractAttribute(nodeElem.child("tag:node"), "id");
final Map<String, String> data = nodeElem.child("content").getChildren()
.stream()
.map(this::extractDataElemContent)
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
return new Node(id, data);
}
private Edge processEdgeElem(final ParseTree edgeElem) {
final String id = extractAttribute(edgeElem.child("tag:edge"), "id");
final String source = extractAttribute(edgeElem.child("tag:edge"), "source");
final String target = extractAttribute(edgeElem.child("tag:edge"), "target");
final Map<String, String> data = edgeElem.child("content").getChildren()
.stream()
.map(this::extractDataElemContent)
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
return new Edge(id, source, target, data);
}
private Map.Entry<String, String> extractDataElemContent(final ParseTree dataElem) {
final var attribute = extractAttribute(dataElem.child("tag:data"), "key");
final var content = dataElem.child(1).getText();
return Map.entry(attribute, content);
}
private String extractAttribute(final ParseTree tag, final String attributeKey) {
return tag.child("attributes").getChildren()
.stream()
.filter(a -> a.child(0).getText().equals(attributeKey))
.map(a -> a.child(1).getText())
.findFirst()
.orElseThrow();
}
}

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parsley-examples/src/main/java/com/albertoventurini/parsley/examples/graphml/GraphMLParseResult.java Normal file
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package com.albertoventurini.parsley.examples.graphml;
import java.util.List;
public final class GraphMLParseResult {
private final List<Node> nodes;
private final List<Edge> edges;
public GraphMLParseResult(final List<Node> nodes, final List<Edge> edges) {
this.nodes = nodes;
this.edges = edges;
}
public List<Node> nodes() {
return nodes;
}
public List<Edge> edges() {
return edges;
}
}

5
parsley-examples/src/main/java/com/albertoventurini/parsley/examples/graphml/GraphMLParser.java Normal file
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package com.albertoventurini.parsley.examples.graphml;
public interface GraphMLParser {
GraphMLParseResult parse(String filePath);
}

22
parsley-examples/src/main/java/com/albertoventurini/parsley/examples/graphml/Node.java Normal file
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package com.albertoventurini.parsley.examples.graphml;
import java.util.Map;
public final class Node {
private final String id;
private final Map<String, String> data;
public Node(final String id, final Map<String, String> data) {
this.id = id;
this.data = data;
}
public String id() {
return id;
}
public Map<String, String> data() {
return data;
}
}

90
parsley-examples/src/test/java/com/albertoventurini/parsley/examples/graphml/GraphMLGrammarTest.java Normal file
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package com.albertoventurini.parsley.examples.graphml;
import com.albertoventurini.parsley.grammar.Grammar;
import com.albertoventurini.parsley.grammar.rules.Rule;
import org.junit.jupiter.api.Test;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.function.BiFunction;
import java.util.function.Function;
import static com.albertoventurini.parsley.grammar.Grammar.*;
import static org.junit.jupiter.api.Assertions.assertTrue;
public class GraphMLGrammarTest {
private final Grammar grammar;
public GraphMLGrammarTest() {
final Rule comment = sequence(string("<!--"), until("-->"));
final Rule comments = zeroOrMore(comment);
final Rule xmlHeader = string("<?xml version='1.0' ?>").as("header");
final Rule attribute = sequence(
takeWhile(c -> c != '=' && c != '>'),
character('='),
character('\''),
takeWhile(c -> c != '\''),
character('\'')).as("attribute");
final Function<String, Rule> tagFunc = (s) -> sequence(
character('<'),
string(s),
zeroOrMore(attribute).as("attributes"),
character('>'));
final Function<String, Rule> closingTagFunc = (s) -> sequence(
string("</"),
string(s),
character('>'));
final BiFunction<String, Rule, Rule> elementFunc = (tagName, content) -> sequence(
tagFunc.apply(tagName).as("tag:" + tagName),
content.as("content"),
closingTagFunc.apply(tagName).as("closingTag:" + tagName));
final Rule data = elementFunc.apply("data", takeWhile(c -> c != '<')).as("dataElem");
final Rule node = elementFunc.apply("node", zeroOrMore(data)).as("nodeElem");
final Rule edge = elementFunc.apply("edge", zeroOrMore(data)).as("edgeElem");
final Rule graph = sequence(
tagFunc.apply("graph"),
oneOrMore(node).as("nodes"),
oneOrMore(edge).as("edges"),
closingTagFunc.apply("graph")).as("graphElem");
final Rule key = sequence(
tagFunc.apply("key"),
closingTagFunc.apply("key")).as("keyElem");
final Rule graphml = sequence(
tagFunc.apply("graphml"),
oneOrMore(key).as("keys"),
graph,
closingTagFunc.apply("graphml")).as("graphmlElem");
final Rule graphmlFile = sequence(xmlHeader, graphml).as("graphmlFile");
grammar = new Grammar(graphmlFile, comments);
}
@Test
public void graphmlGrammar_shouldParseGraphmlFile() throws Exception {
final var result =
grammar.parse(Files.readString(Path.of("src/test/resources/graphml/graphA.graphml")));
assertTrue(result.isPresent());
}
@Test
public void graphmlGrammar_shouldParseLargeGraphmlFile() throws Exception {
final var result =
grammar.parse(Files.readString(Path.of("src/test/resources/graphml/air-routes-latest.graphml")));
assertTrue(result.isPresent());
}
}

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parsley-examples/src/test/resources/graphml/air-routes-latest.graphml Normal file
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parsley-examples/src/test/resources/graphml/graphA.graphml Normal file
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<?xml version='1.0' ?>
<!-- ******************************************************************************* -->
<!-- Sample file containing selected air routes between selected airports. -->
<graphml xmlns='http://graphml.graphdrawing.org/xmlns'>
<key id='type' for='node' attr.name='type' attr.type='string'></key>
<key id='code' for='node' attr.name='code' attr.type='string'></key>
<key id='icao' for='node' attr.name='icao' attr.type='string'></key>
<key id='desc' for='node' attr.name='desc' attr.type='string'></key>
<key id='region' for='node' attr.name='region' attr.type='string'></key>
<key id='runways' for='node' attr.name='runways' attr.type='int'></key>
<key id='longest' for='node' attr.name='longest' attr.type='int'></key>
<key id='elev' for='node' attr.name='elev' attr.type='int'></key>
<key id='country' for='node' attr.name='country' attr.type='string'></key>
<key id='city' for='node' attr.name='city' attr.type='string'></key>
<key id='lat' for='node' attr.name='lat' attr.type='double'></key>
<key id='lon' for='node' attr.name='lon' attr.type='double'></key>
<key id='author' for='node' attr.name='author' attr.type='string'></key>
<key id='date' for='node' attr.name='date' attr.type='string'></key>
<key id='dist' for='edge' attr.name='dist' attr.type='int'></key>
<key id='labelV' for='node' attr.name='labelV' attr.type='string'></key>
<key id='labelE' for='edge' attr.name='labelE' attr.type='string'></key>
<graph id='routes' edgedefault='directed'>
<node id='0'>
<data key='labelV'>version</data>
<data key='type'>version</data>
<data key='code'>0.84</data>
<data key='date'>2020-01-30 02:17:18 UTC</data>
<data key='author'>Kelvin R. Lawrence</data>
<data key='desc'>Air Routes Data - Version: 0.84 Generated: 2020-01-30 02:17:18 UTC; Graph created by Kelvin R. Lawrence; Please let me know of any errors you find in the graph.</data>
</node>
<node id='1'>
<data key='labelV'>airport</data>
<data key='type'>airport</data>
<data key='code'>ATL</data>
<data key='icao'>KATL</data>
<data key='city'>Atlanta</data>
<data key='desc'>Hartsfield - Jackson Atlanta International Airport</data>
<data key='region'>US-GA</data>
<data key='runways'>5</data>
<data key='longest'>12390</data>
<data key='elev'>1026</data>
<data key='country'>US</data>
<data key='lat'>33.6366996765137</data>
<data key='lon'>-84.4281005859375</data>
</node>
<node id='2'>
<data key='labelV'>airport</data>
<data key='type'>airport</data>
<data key='code'>ANC</data>
<data key='icao'>PANC</data>
<data key='city'>Anchorage</data>
<data key='desc'>Anchorage Ted Stevens</data>
<data key='region'>US-AK</data>
<data key='runways'>3</data>
<data key='longest'>12400</data>
<data key='elev'>151</data>
<data key='country'>US</data>
<data key='lat'>61.1744003295898</data>
<data key='lon'>-149.996002197266</data>
</node>
<edge id='3742' source='1' target='3'>
<data key='labelE'>route</data>
<data key='dist'>811</data>
</edge>
<edge id='3743' source='1' target='4'>
<data key='labelE'>route</data>
<data key='dist'>214</data>
</edge>
</graph>
</graphml>

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parsley-grammar/pom.xml Normal file
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>parsley-grammar</artifactId>
<packaging>jar</packaging>
<version>0.1.0-SNAPSHOT</version>
<name>parsley-grammar</name>
<parent>
<groupId>com.albertoventurini.parsley</groupId>
<artifactId>parsley</artifactId>
<version>0.1.0-SNAPSHOT</version>
</parent>
<url>https://github.com/albertoventurini/parsley</url>
<properties>
<antlr.version>4.7.1</antlr.version>
<junit.version>5.6.1</junit.version>
<maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
<maven-surefire-plugin.version>3.0.0-M5</maven-surefire-plugin.version>
<maven-jar-plugin.version>3.2.0</maven-jar-plugin.version>
<maven-shade.plugin.version>3.2.2</maven-shade.plugin.version>
<mainClass>com.albertoventurini.parsley.Main</mainClass>
</properties>
<dependencies>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>11</source>
<target>11</target>
<release>11</release>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<argLine>--enable-preview</argLine>
</configuration>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>${mainClass}</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>

26
src/main/java/com/albertoventurini/parsley/Grammar.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/Grammar.java
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@ -1,17 +1,17 @@
package com.albertoventurini.parsley;
package com.albertoventurini.parsley.grammar;
import com.albertoventurini.parsley.rules.AnyCharacter;
import com.albertoventurini.parsley.rules.MatchCharacter;
import com.albertoventurini.parsley.rules.MatchString;
import com.albertoventurini.parsley.rules.OneOf;
import com.albertoventurini.parsley.rules.OneOrMore;
import com.albertoventurini.parsley.rules.Rule;
import com.albertoventurini.parsley.rules.Sequence;
import com.albertoventurini.parsley.rules.TakeWhileCharacter;
import com.albertoventurini.parsley.rules.UntilString;
import com.albertoventurini.parsley.rules.Wrapper;
import com.albertoventurini.parsley.rules.ZeroOrMore;
import com.albertoventurini.parsley.rules.ZeroOrOne;
import com.albertoventurini.parsley.grammar.rules.AnyCharacter;
import com.albertoventurini.parsley.grammar.rules.MatchCharacter;
import com.albertoventurini.parsley.grammar.rules.MatchString;
import com.albertoventurini.parsley.grammar.rules.OneOf;
import com.albertoventurini.parsley.grammar.rules.OneOrMore;
import com.albertoventurini.parsley.grammar.rules.Rule;
import com.albertoventurini.parsley.grammar.rules.Sequence;
import com.albertoventurini.parsley.grammar.rules.TakeWhileCharacter;
import com.albertoventurini.parsley.grammar.rules.UntilString;
import com.albertoventurini.parsley.grammar.rules.Wrapper;
import com.albertoventurini.parsley.grammar.rules.ZeroOrMore;
import com.albertoventurini.parsley.grammar.rules.ZeroOrOne;
import java.util.Optional;
import java.util.function.Predicate;

4
src/main/java/com/albertoventurini/parsley/GrammarContext.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/GrammarContext.java
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@ -1,6 +1,6 @@
package com.albertoventurini.parsley;
package com.albertoventurini.parsley.grammar;
import com.albertoventurini.parsley.rules.Rule;
import com.albertoventurini.parsley.grammar.rules.Rule;
public class GrammarContext extends ParseContext {
private final Rule commentRule;

2
src/main/java/com/albertoventurini/parsley/ParseContext.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/ParseContext.java
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@ -1,4 +1,4 @@
package com.albertoventurini.parsley;
package com.albertoventurini.parsley.grammar;
import java.util.Arrays;

2
src/main/java/com/albertoventurini/parsley/ParseException.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/ParseException.java
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@ -1,4 +1,4 @@
package com.albertoventurini.parsley;
package com.albertoventurini.parsley.grammar;
public class ParseException extends RuntimeException {

2
src/main/java/com/albertoventurini/parsley/ParseTree.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/ParseTree.java
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@ -1,4 +1,4 @@
package com.albertoventurini.parsley;
package com.albertoventurini.parsley.grammar;
import java.util.Collections;
import java.util.List;

6
src/main/java/com/albertoventurini/parsley/rules/AnyCharacter.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/rules/AnyCharacter.java
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@ -1,7 +1,7 @@
package com.albertoventurini.parsley.rules;
package com.albertoventurini.parsley.grammar.rules;
import com.albertoventurini.parsley.GrammarContext;
import com.albertoventurini.parsley.ParseTree;
import com.albertoventurini.parsley.grammar.GrammarContext;
import com.albertoventurini.parsley.grammar.ParseTree;
import java.util.Optional;

6
src/main/java/com/albertoventurini/parsley/rules/MatchCharacter.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/rules/MatchCharacter.java
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@ -1,7 +1,7 @@
package com.albertoventurini.parsley.rules;
package com.albertoventurini.parsley.grammar.rules;
import com.albertoventurini.parsley.GrammarContext;
import com.albertoventurini.parsley.ParseTree;
import com.albertoventurini.parsley.grammar.GrammarContext;
import com.albertoventurini.parsley.grammar.ParseTree;
import java.util.Optional;

6
src/main/java/com/albertoventurini/parsley/rules/MatchString.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/rules/MatchString.java
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@ -1,7 +1,7 @@
package com.albertoventurini.parsley.rules;
package com.albertoventurini.parsley.grammar.rules;
import com.albertoventurini.parsley.GrammarContext;
import com.albertoventurini.parsley.ParseTree;
import com.albertoventurini.parsley.grammar.GrammarContext;
import com.albertoventurini.parsley.grammar.ParseTree;
import java.util.Optional;

6
src/main/java/com/albertoventurini/parsley/rules/OneOf.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/rules/OneOf.java
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@ -1,7 +1,7 @@
package com.albertoventurini.parsley.rules;
package com.albertoventurini.parsley.grammar.rules;
import com.albertoventurini.parsley.GrammarContext;
import com.albertoventurini.parsley.ParseTree;
import com.albertoventurini.parsley.grammar.GrammarContext;
import com.albertoventurini.parsley.grammar.ParseTree;
import java.util.Arrays;
import java.util.Optional;

6
src/main/java/com/albertoventurini/parsley/rules/OneOrMore.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/rules/OneOrMore.java
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@ -1,7 +1,7 @@
package com.albertoventurini.parsley.rules;
package com.albertoventurini.parsley.grammar.rules;
import com.albertoventurini.parsley.GrammarContext;
import com.albertoventurini.parsley.ParseTree;
import com.albertoventurini.parsley.grammar.GrammarContext;
import com.albertoventurini.parsley.grammar.ParseTree;
import java.util.ArrayList;
import java.util.List;

6
src/main/java/com/albertoventurini/parsley/rules/Rule.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/rules/Rule.java
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@ -1,7 +1,7 @@
package com.albertoventurini.parsley.rules;
package com.albertoventurini.parsley.grammar.rules;
import com.albertoventurini.parsley.GrammarContext;
import com.albertoventurini.parsley.ParseTree;
import com.albertoventurini.parsley.grammar.GrammarContext;
import com.albertoventurini.parsley.grammar.ParseTree;
import java.util.Optional;

8
src/main/java/com/albertoventurini/parsley/rules/Sequence.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/rules/Sequence.java
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@ -1,7 +1,7 @@
package com.albertoventurini.parsley.rules;
package com.albertoventurini.parsley.grammar.rules;
import com.albertoventurini.parsley.GrammarContext;
import com.albertoventurini.parsley.ParseTree;
import com.albertoventurini.parsley.grammar.GrammarContext;
import com.albertoventurini.parsley.grammar.ParseTree;
import java.util.ArrayList;
import java.util.Arrays;
@ -20,7 +20,7 @@ public final class Sequence extends Rule {
final int start = ctx.getCursor();
final List<ParseTree> children = new ArrayList<>(rules.length);
for (final Rule rule : rules) {
for (final com.albertoventurini.parsley.grammar.rules.Rule rule : rules) {
if (!ctx.hasNext()) {
ctx.setCursor(start);
return Optional.empty();

6
src/main/java/com/albertoventurini/parsley/rules/TakeWhileCharacter.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/rules/TakeWhileCharacter.java
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@ -1,7 +1,7 @@
package com.albertoventurini.parsley.rules;
package com.albertoventurini.parsley.grammar.rules;
import com.albertoventurini.parsley.GrammarContext;
import com.albertoventurini.parsley.ParseTree;
import com.albertoventurini.parsley.grammar.GrammarContext;
import com.albertoventurini.parsley.grammar.ParseTree;
import java.util.Optional;
import java.util.function.Predicate;

6
src/main/java/com/albertoventurini/parsley/rules/UntilString.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/rules/UntilString.java
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@ -1,7 +1,7 @@
package com.albertoventurini.parsley.rules;
package com.albertoventurini.parsley.grammar.rules;
import com.albertoventurini.parsley.GrammarContext;
import com.albertoventurini.parsley.ParseTree;
import com.albertoventurini.parsley.grammar.GrammarContext;
import com.albertoventurini.parsley.grammar.ParseTree;
import java.util.Arrays;
import java.util.Optional;

6
src/main/java/com/albertoventurini/parsley/rules/Wrapper.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/rules/Wrapper.java
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@ -1,7 +1,7 @@
package com.albertoventurini.parsley.rules;
package com.albertoventurini.parsley.grammar.rules;
import com.albertoventurini.parsley.GrammarContext;
import com.albertoventurini.parsley.ParseTree;
import com.albertoventurini.parsley.grammar.GrammarContext;
import com.albertoventurini.parsley.grammar.ParseTree;
import java.util.Optional;

6
src/main/java/com/albertoventurini/parsley/rules/ZeroOrMore.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/rules/ZeroOrMore.java
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@ -1,7 +1,7 @@
package com.albertoventurini.parsley.rules;
package com.albertoventurini.parsley.grammar.rules;
import com.albertoventurini.parsley.GrammarContext;
import com.albertoventurini.parsley.ParseTree;
import com.albertoventurini.parsley.grammar.GrammarContext;
import com.albertoventurini.parsley.grammar.ParseTree;
import java.util.ArrayList;
import java.util.List;

6
src/main/java/com/albertoventurini/parsley/rules/ZeroOrOne.java → parsley-grammar/src/main/java/com/albertoventurini/parsley/grammar/rules/ZeroOrOne.java
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@ -1,7 +1,7 @@
package com.albertoventurini.parsley.rules;
package com.albertoventurini.parsley.grammar.rules;
import com.albertoventurini.parsley.GrammarContext;
import com.albertoventurini.parsley.ParseTree;
import com.albertoventurini.parsley.grammar.GrammarContext;
import com.albertoventurini.parsley.grammar.ParseTree;
import java.util.Optional;

148
parsley-grammar/src/test/java/com/albertoventurini/parsley/grammar/GrammarTest.java Normal file
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@ -0,0 +1,148 @@
package com.albertoventurini.parsley.grammar;
import com.albertoventurini.parsley.grammar.rules.Rule;
import org.junit.jupiter.api.Test;
import java.util.function.Function;
import static com.albertoventurini.parsley.grammar.Grammar.character;
import static com.albertoventurini.parsley.grammar.Grammar.oneOf;
import static com.albertoventurini.parsley.grammar.Grammar.sequence;
import static com.albertoventurini.parsley.grammar.Grammar.string;
import static com.albertoventurini.parsley.grammar.Grammar.takeWhile;
import static com.albertoventurini.parsley.grammar.Grammar.token;
import static com.albertoventurini.parsley.grammar.Grammar.zeroOrMore;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
public class GrammarTest {
@Test
public void xmlTagWithoutAttributes() {
final Rule tag = sequence(
character('<'),
takeWhile(Character::isLetterOrDigit),
oneOf(string("/>"), character('>')));
final Grammar grammar = new Grammar(tag, null);
final var parseTree1 = grammar.parse("<tag1>");
assertTrue(parseTree1.isPresent());
assertEquals("tag1", parseTree1.get().child(0).getText());
final var parseTree2 = grammar.parse("<tag1 />");
assertTrue(parseTree2.isPresent());
assertEquals("tag1", parseTree2.get().child(0).getText());
}
@Test
public void xmlTagWithOptionalAttributes() {
final Rule token = takeWhile(Character::isLetterOrDigit);
final Rule attribute = sequence(token, character('='), token);
final Rule tag = sequence(
character('<'),
token,
zeroOrMore(attribute),
oneOf(string("/>"), character('>')));
final Grammar grammar = new Grammar(tag, null);
assertTrue(grammar.parse("<tag1>").isPresent());
final var parseTree1 = grammar.parse("<tag1 id=123>");
assertTrue(parseTree1.isPresent());
assertEquals("tag1", parseTree1.get().child(0).getText());
assertEquals("id", parseTree1.get().child(1) // get the zeroOrMore rule
.child(0) // get the first attribute
.child(0) // get the first element in the sequence rule
.getText()
);
assertEquals("123", parseTree1.get().child(1) // get the zeroOrMore rule
.child(0) // get the first attribute
.child(1) // get the second child in the sequence
.getText()
);
final var parseTree2 = grammar.parse("<tag1 hello=world something=else/>");
assertTrue(parseTree2.isPresent());
assertEquals("tag1", parseTree2.get().child(0).getText());
assertEquals("hello", parseTree2.get().child(1) // get the zeroOrMore rule
.child(0) // get the first attribute
.child(0) // get the first child in the sequence
.getText()
);
assertEquals("world", parseTree2.get().child(1) // get the zeroOrMore rule
.child(0) // get the first attribute
.child(1) // get the second child in the sequence
.getText()
);
assertEquals("something", parseTree2.get().child(1) // get the zeroOrMore rule
.child(1) // get the second attribute
.child(0) // get the first child in the sequence
.getText()
);
assertEquals("else", parseTree2.get().child(1) // get the zeroOrMore rule
.child(1) // get the second attribute
.child(1) // get the second child in the sequence
.getText()
);
}
@Test
public void xmlTagWithAttributeSurroundedByQuotes() {
final Rule attribute = sequence(
takeWhile(c -> c != '='),
character('='),
character('\''),
takeWhile(c -> c != '\''),
character('\''));
final Rule tag = sequence(
character('<'),
token(),
zeroOrMore(attribute),
oneOf(string("/>"), character('>')));
final Grammar grammar = new Grammar(tag, null);
assertTrue(grammar.parse("<graphml xmlns='http://graphml.graphdrawing.org/xmlns'>").isPresent());
}
@Test
public void elementWithoutContent() {
final Rule attribute = sequence(
takeWhile(c -> c != '=' && c != '>'),
character('='),
character('\''),
takeWhile(c -> c != '\''),
character('\''));
final Function<String, Rule> tagFunc = (s) -> sequence(
character('<'),
string(s),
zeroOrMore(attribute),
character('>'));
final Function<String, Rule> closingTagFunc = (s) -> sequence(
string("</"),
string(s),
string(">"));
final Rule key = sequence(
tagFunc.apply("key"),
closingTagFunc.apply("key"));
final Grammar grammar = new Grammar(key, null);
assertTrue(grammar.parse("<key id='type' for='node' attr.name='type' attr.type='string'></key>").isPresent());
}
}

9
pom.xml
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@ -4,13 +4,18 @@
<groupId>com.albertoventurini.parsley</groupId>
<artifactId>parsley</artifactId>
<packaging>jar</packaging>
<packaging>pom</packaging>
<version>0.1.0-SNAPSHOT</version>
<name>graphino</name>
<name>parsley</name>
<url>https://github.com/albertoventurini/parsley</url>
<modules>
<module>parsley-grammar</module>
<module>parsley-examples</module>
</modules>
<properties>
<antlr.version>4.7.1</antlr.version>
<junit.version>5.6.1</junit.version>