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bpsm committed Sep 11, 2012
0 parents commit b2f496eee527bbf72f20d5b4cade84dcce700ef6
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  1. +10 −0 .classpath
  2. +1 −0 .gitignore
  3. +23 −0 .project
  4. +2 −0 .settings/org.eclipse.core.runtime.prefs
  5. +5 −0 .settings/org.eclipse.jdt.core.prefs
  6. +4 −0 .settings/org.eclipse.m2e.core.prefs
  7. +228 −0 LICENSE.txt
  8. +75 −0 README.md
  9. +27 −0 pom.xml
  10. +66 −0 src/main/java/bpsm/edn/model/Keyword.java
  11. +7 −0 src/main/java/bpsm/edn/model/Named.java
  12. +109 −0 src/main/java/bpsm/edn/model/Symbol.java
  13. +63 −0 src/main/java/bpsm/edn/model/Tag.java
  14. +63 −0 src/main/java/bpsm/edn/model/TaggedValue.java
  15. +8 −0 src/main/java/bpsm/edn/parser/BuilderFactory.java
  16. +7 −0 src/main/java/bpsm/edn/parser/CollectionBuilder.java
  17. +22 −0 src/main/java/bpsm/edn/parser/EdnException.java
  18. +138 −0 src/main/java/bpsm/edn/parser/Parser.java
  19. +145 −0 src/main/java/bpsm/edn/parser/ParserConfiguration.java
  20. +10 −0 src/main/java/bpsm/edn/parser/TagHandler.java
  21. +69 −0 src/main/java/bpsm/edn/parser/handlers/InstantHandler.java
  22. +19 −0 src/main/java/bpsm/edn/parser/handlers/UuidHandler.java
  23. +16 −0 src/main/java/bpsm/edn/parser/input/CharSequenceInput.java
  24. +7 −0 src/main/java/bpsm/edn/parser/input/Input.java
  25. +38 −0 src/main/java/bpsm/edn/parser/input/ReaderInput.java
  26. +463 −0 src/main/java/bpsm/edn/parser/scanner/Scanner.java
  27. +15 −0 src/main/java/bpsm/edn/parser/scanner/Token.java
  28. +49 −0 src/main/java/bpsm/edn/parser/util/CharClassify.java
  29. 0 src/main/resources/.gitignore
  30. +57 −0 src/test/java/bpsm/edn/parser/IOUtil.java
  31. +95 −0 src/test/java/bpsm/edn/parser/TestParser.java
  32. +274 −0 src/test/java/bpsm/edn/parser/TestScanner.java
  33. +15 −0 src/test/resources/bpsm/edn/edn-sample.txt
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<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" output="target/classes" path="src/main/java"/>
<classpathentry excluding="**" kind="src" output="target/classes" path="src/main/resources"/>
<classpathentry kind="src" output="target/test-classes" path="src/test/java"/>
<classpathentry excluding="**" kind="src" output="target/test-classes" path="src/test/resources"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5"/>
<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER"/>
<classpathentry kind="output" path="target/classes"/>
</classpath>
@@ -0,0 +1 @@
target
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<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>edn-java</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.m2e.core.maven2Builder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
<nature>org.eclipse.m2e.core.maven2Nature</nature>
</natures>
</projectDescription>
@@ -0,0 +1,2 @@
eclipse.preferences.version=1
line.separator=\n
@@ -0,0 +1,5 @@
eclipse.preferences.version=1
org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5
org.eclipse.jdt.core.compiler.compliance=1.5
org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
org.eclipse.jdt.core.compiler.source=1.5
@@ -0,0 +1,4 @@
activeProfiles=
eclipse.preferences.version=1
resolveWorkspaceProjects=true
version=1
@@ -0,0 +1,228 @@
Eclipse Public License - v 1.0

THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE
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@@ -0,0 +1,75 @@
# edn-java

*edn-java* is a library to read [edn](https://github.com/edn-format/edn).

This is very early days. Consider all of this library subject to change, incomplete and probably buggy. There are still rough edges in the design which may see me moving things around some before I'm happy with the result.

## Installation

This is a Maven project with the following coordinates:

<dependency>
<groupId>info.bsmithmannschott</groupId>
<artifactId>edn-java</artifactId>
<version>0.1-SNAPSHOT</version>
</dependency>

You'll have to build it form source yourself using Maven. This libraray is not currently available in any public repository.

## Usage

You'll need to create a Parser and supply it with some Input.

import bpsm.edn.parser.Parser;
import bpsm.edn.parser.input.CharSequenceInput;
import bpsm.edn.parser.scanner.Token;

...

Parser parser = Parser.newParser(
new CharSequenceInput("{:x 1 y 2}"));

You can then call `nextValue()` to read values form the input.

parser.nextValue(); // returns a map with :x->1 and y->2
parser.nextValue(); // returns Token.END_OF_INPUT;

If the input is exhausted, `END_OF_INPUT` is returned. An Input implementation which wraps a java.io.Reader is also provided.

## Mapping from EDN to Java

*edn* values map mostly to regular Java types, except in such cases where Java doesn't provide something suitable. Suitable implementations are provided by the package `bpsm.edn.model`.

`Symbol` and `Keyword` have an optional `prefix` and a mandatory `name`. Both implement the interface `Named`.

Integers are mapped to `Integer`, `Long` or `BigInteger` depending on the magnitude of the number. Appending `N` to an integer literal causes the integer to be mapped to `BigInteger` irrespective of its magnitude.

Floating point numbers with the suffix `M` are mapeped to `BigDecimal`. All others are mapped to `Double`.

Characters are mapped to `Character`, booleans to `Boolean` and strings to `String`. No great shock there, I trust.

Lists and vectors are both mapped to implementations of `java.util.List`. List maps to `java.util.LinkedList`, while vector maps to `java.util.ArrayList`.

Maps map to `java.util.HashMap` and sets to `java.util.HashSet`.

The parser can be customized to use different collections by providing alternate implementations of `BuidlerFactory` to the Parser's configuration:

parser.getConfiguration().setListFactory( ... )

## Tagged Values

Tagged values with an unrecognized tag are mapped to `bpsm.edn.model.TaggedValue`.

Handlers are provided automatically for `#inst` and `#uuid`, which return a `java.util.Date` and a `java.util.UUID` respectively.

Handlers may be customized by manipulating the parser's configuration:

parser.getConfiguration().getTagHandlers().put(
new Tag("bpsm", "uri"),
new TagHandler() {
public Object transform(Tag tag, Object value) {
return new URL((String)value);
}
});


27 pom.xml
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<?xml version="1.0" encoding="utf-8"?>
<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>
<groupId>info.bsmithmannschott</groupId>
<artifactId>edn-java</artifactId>
<version>0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<licenses>
<license>
<name>Eclipse Public License - v 1.0</name>
<url>http://www.eclipse.org/legal/epl-v10.html</url>
<distribution>repo</distribution>
</license>
</licenses>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
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