org.yaml.snakeyaml.composer.Composer Java Examples

public static Node read(YamlSource source, Reader reader, ConfigurationContext context) throws IOException {
    LoaderOptions loaderOptions = new LoaderOptions();
    loaderOptions.setMaxAliasesForCollections(context.getYamlMaxAliasesForCollections());
    Composer composer = new Composer(
        new ParserImpl(new StreamReaderWithSource(source, reader)),
        new Resolver(),
        loaderOptions);
    try {
        return composer.getSingleNode();
    } catch (YAMLException e) {
        if (e.getMessage().startsWith("Number of aliases for non-scalar nodes exceeds the specified max")) {
            throw new ConfiguratorException(String.format(
                "%s%nYou can increase the maximum by setting an environment variable or property%n  ENV: %s=\"100\"%n  PROPERTY: -D%s=\"100\"",
                e.getMessage(), ConfigurationContext.CASC_YAML_MAX_ALIASES_ENV,
                ConfigurationContext.CASC_YAML_MAX_ALIASES_PROPERTY));
        }
        throw e;
    }
}
 

/**
 * Parse all YAML documents in a stream and produce corresponding
 * representation trees.
 *
 * @see <a href="http://yaml.org/spec/1.1/#id859333">Processing Overview</a>
 * @param yaml
 *            stream of YAML documents
 * @return parsed root Nodes for all the specified YAML documents
 */
public Iterable<Node> composeAll(Reader yaml) {
    final Composer composer = new Composer(new ParserImpl(new StreamReader(yaml)), resolver);
    constructor.setComposer(composer);
    Iterator<Node> result = new Iterator<Node>() {
        public boolean hasNext() {
            return composer.checkNode();
        }

        public Node next() {
            return composer.getNode();
        }

        public void remove() {
            throw new UnsupportedOperationException();
        }
    };
    return new NodeIterable(result);
}
 

/**
 * Parse all YAML documents in a String and produce corresponding Java
 * objects. The documents are parsed only when the iterator is invoked.
 *
 * @param yaml
 *            YAML data to load from (BOM must not be present)
 * @return an iterator over the parsed Java objects in this String in proper
 *         sequence
 */
public Iterable<Object> loadAll(Reader yaml) {
    Composer composer = new Composer(new ParserImpl(new StreamReader(yaml)), resolver);
    constructor.setComposer(composer);
    Iterator<Object> result = new Iterator<Object>() {
        public boolean hasNext() {
            return constructor.checkData();
        }

        public Object next() {
            return constructor.getData();
        }

        public void remove() {
            throw new UnsupportedOperationException();
        }
    };
    return new YamlIterable(result);
}
 

@Override
public Object load(Reader yaml) {
    try {
        int ch = yaml.read();
        StringBuilder buffer = new StringBuilder();
        while (ch != -1) {
            buffer.append((char) ch);
            ch = yaml.read();
        }
        Composer composer = new Composer(new CanonicalParser(buffer.toString()), resolver);
        constructor.setComposer(composer);
        return constructor.getSingleData(Object.class);
    } catch (IOException e) {
        throw new YAMLException(e);
    }
}
 

@Override
public Iterable<Object> loadAll(Reader yaml) {
    StreamReader reader = new StreamReader(yaml);
    StringBuilder buffer = new StringBuilder();
    while (reader.peek() != '\0') {
        buffer.append(reader.peek());
        reader.forward();
    }
    CanonicalParser parser = new CanonicalParser(buffer.toString());
    Composer composer = new Composer(parser, resolver);
    this.constructor.setComposer(composer);
    Iterator<Object> result = new Iterator<Object>() {
        public boolean hasNext() {
            return constructor.checkData();
        }

        public Object next() {
            return constructor.getData();
        }

        public void remove() {
            throw new UnsupportedOperationException();
        }
    };
    return new YamlIterable(result);
}
 

/**
 * Parse all YAML documents in a stream and produce corresponding
 * representation trees.
 * 
 * @see <a href="http://yaml.org/spec/1.1/#id859333">Processing Overview</a>
 * @param yaml
 *            stream of YAML documents
 * @return parsed root Nodes for all the specified YAML documents
 */
public Iterable<Node> composeAll(Reader yaml) {
    final Composer composer = new Composer(new ParserImpl(new StreamReader(yaml)), resolver);
    constructor.setComposer(composer);
    Iterator<Node> result = new Iterator<Node>() {
        public boolean hasNext() {
            return composer.checkNode();
        }

        public Node next() {
            return composer.getNode();
        }

        public void remove() {
            throw new UnsupportedOperationException();
        }
    };
    return new NodeIterable(result);
}
 

/**
 * Parse all YAML documents in a String and produce corresponding Java
 * objects. The documents are parsed only when the iterator is invoked.
 * 
 * @param yaml
 *            YAML data to load from (BOM must not be present)
 * @return an iterator over the parsed Java objects in this String in proper
 *         sequence
 */
public Iterable<Object> loadAll(Reader yaml) {
    Composer composer = new Composer(new ParserImpl(new StreamReader(yaml)), resolver);
    constructor.setComposer(composer);
    Iterator<Object> result = new Iterator<Object>() {
        public boolean hasNext() {
            return constructor.checkData();
        }

        public Object next() {
            return constructor.getData();
        }

        public void remove() {
            throw new UnsupportedOperationException();
        }
    };
    return new YamlIterable(result);
}
 

/**
 * Parse all YAML documents in a stream and produce corresponding
 * representation trees.
 * 
 * @see <a href="http://yaml.org/spec/1.1/#id859333">Processing Overview</a>
 * @param yaml
 *            stream of YAML documents
 * @return parsed root Nodes for all the specified YAML documents
 */
public Iterable<Node> composeAll(Reader yaml) {
    final Composer composer = new Composer(new ParserImpl(new StreamReader(yaml)), resolver);
    constructor.setComposer(composer);
    Iterator<Node> result = new Iterator<Node>() {
        public boolean hasNext() {
            return composer.checkNode();
        }

        public Node next() {
            return composer.getNode();
        }

        public void remove() {
            throw new UnsupportedOperationException();
        }
    };
    return new NodeIterable(result);
}
 

/**
 * Parse all YAML documents in a String and produce corresponding Java
 * objects. The documents are parsed only when the iterator is invoked.
 * 
 * @param yaml
 *            YAML data to load from (BOM must not be present)
 * @return an iterator over the parsed Java objects in this String in proper
 *         sequence
 */
public Iterable<Object> loadAll(Reader yaml) {
    Composer composer = new Composer(new ParserImpl(new StreamReader(yaml)), resolver);
    constructor.setComposer(composer);
    Iterator<Object> result = new Iterator<Object>() {
        public boolean hasNext() {
            return constructor.checkData();
        }

        public Object next() {
            return constructor.getData();
        }

        public void remove() {
            throw new UnsupportedOperationException();
        }
    };
    return new YamlIterable(result);
}
 

/**
 * Load configuration-as-code model from a snakeyaml Node
 */
private static Mapping loadFrom(Node node) {
    final ModelConstructor constructor = new ModelConstructor();
    constructor.setComposer(new Composer(null, null) {

        @Override
        public Node getSingleNode() {
            return node;
        }
    });
    return (Mapping) constructor.getSingleData(Mapping.class);
}
 

public void testFragment() {
    String document = "foo:  blargle\n"
            + "developer:  { name: \"Bjarne Stroustrup\", language: \"C++\"}\n"
            + "gee:  [ \"whiz\", \"bang\"]\n";//

    StreamReader reader = new StreamReader(document);
    Composer composer = new FragmentComposer(new ParserImpl(reader), new Resolver(),
            "developer");
    Constructor constructor = new Constructor();
    constructor.setComposer(composer);
    DeveloperBean developer = (DeveloperBean) constructor.getSingleData(DeveloperBean.class);
    assertEquals("Bjarne Stroustrup", developer.name);
    assertEquals("C++", developer.language);
}
 

private Object construct(Constructor constructor, String data) {
    StreamReader reader = new StreamReader(data);
    Parser parser = new ParserImpl(reader);
    Resolver resolver = new Resolver();
    Composer composer = new Composer(parser, resolver);
    constructor.setComposer(composer);
    return constructor.getSingleData(Object.class);
}
 

@SuppressWarnings("unchecked")
private List<Object> construct(Constructor constructor, String data) {
    StreamReader reader = new StreamReader(data);
    Parser parser = new ParserImpl(reader);
    Resolver resolver = new Resolver();
    Composer composer = new Composer(parser, resolver);
    constructor.setComposer(composer);
    List<Object> result = (List<Object>) constructor.getSingleData(Object.class);
    return result;
}
 

private List<Node> compose_all(InputStream file) {
    Composer composer = new Composer(new ParserImpl(new StreamReader(new UnicodeReader(file))),
            new Resolver());
    List<Node> documents = new ArrayList<Node>();
    while (composer.checkNode()) {
        documents.add(composer.getNode());
    }
    return documents;
}
 

private List<Node> canonical_compose_all(InputStream file) {
    StreamReader reader = new StreamReader(new UnicodeReader(file));
    StringBuilder buffer = new StringBuilder();
    while (reader.peek() != '\0') {
        buffer.append(reader.peek());
        reader.forward();
    }
    CanonicalParser parser = new CanonicalParser(buffer.toString());
    Composer composer = new Composer(parser, new Resolver());
    List<Node> documents = new ArrayList<Node>();
    while (composer.checkNode()) {
        documents.add(composer.getNode());
    }
    return documents;
}
 

public Iterable<Object> loadAll(Reader yaml) {
    try {
        int ch = yaml.read();
        StringBuilder buffer = new StringBuilder();
        while (ch != -1) {
            buffer.append((char) ch);
            ch = yaml.read();
        }
        Composer composer = new Composer(new CanonicalParser(buffer.toString()), resolver);
        this.constructor.setComposer(composer);
        Iterator<Object> result = new Iterator<Object>() {
            public boolean hasNext() {
                return constructor.checkData();
            }

            public Object next() {
                return constructor.getData();
            }

            public void remove() {
                throw new UnsupportedOperationException();
            }
        };
        return new YamlIterable(result);
    } catch (IOException e) {
        throw new YAMLException(e);
    }
}
 

private Object loadFromReader(StreamReader sreader, Class<?> type) {
    Composer composer = new Composer(new ParserImpl(sreader), resolver);
    constructor.setComposer(composer);
    return constructor.getSingleData(type);
}
 

public void setComposer(Composer composer) {
    this.composer = composer;
}
 

private Object loadFromReader(StreamReader sreader, Class<?> type) {
    Composer composer = new Composer(new ParserImpl(sreader), resolver);
    constructor.setComposer(composer);
    return constructor.getSingleData(type);
}
 

private Object loadFromReader(StreamReader sreader, Class<?> type)
{
    Composer composer = new Composer(new ParserImpl(sreader), this.resolver);
    this.constructor.setComposer(composer);
    return this.constructor.getSingleData(type);
}
 

YamlComposerNodeIterator(Composer composer)
{
    this.composer = composer;
}
 

public void setComposer(Composer composer) {
    this.composer = composer;
}
 

public void setComposer(Composer composer) {
    this.composer = composer;
}
 

private Object loadFromReader(StreamReader sreader, Class<?> type) {
    Composer composer = new Composer(new ParserImpl(sreader), resolver);
    constructor.setComposer(composer);
    return constructor.getSingleData(type);
}
 

/**
 * Parse the only YAML document in a stream as configuration object.
 *
 * @param template
 *         template of config object.
 * @param io
 *         data to load from (BOM must not be present)
 * @param <T>
 *         type of config object.
 *
 * @return parsed object
 */
@SuppressWarnings("unchecked")
public <T extends Config> T fromYaml(ConfigTemplate<T> template, Reader io)
{
    Composer composer = new Composer(new ParserImpl(new StreamReader(io)), new ConfigTemplateResolver(template));
    this.constructor.setComposer(composer);
    return (T) this.constructor.getSingleData(template.getConfigType());
}
 

/**
 * Parse all YAML documents in a String and produce corresponding Java
 * objects. The documents are parsed only when the iterator is invoked.
 *
 * @param yaml
 *         YAML data to load from (BOM must not be present)
 *
 * @return an iterator over the parsed Java objects in this String in proper sequence
 */
public Iterable<Object> fromAllYaml(Reader yaml)
{
    Composer composer = new Composer(new ParserImpl(new StreamReader(yaml)), this.resolver);
    this.constructor.setComposer(composer);
    Iterator<Object> result = new YamlLoaderIterator(this);
    return new YamlIterable(result);
}
 

/**
 * Parse the first YAML document in a stream and produce the corresponding
 * representation tree. (This is the opposite of the represent() method)
 *
 * @param yaml
 *         YAML document
 *
 * @return parsed root Node for the specified YAML document
 *
 * @see <a href="http://yaml.org/spec/1.1/#id859333">Figure 3.1. Processing Overview</a>
 */
public Node compose(Reader yaml)
{
    Composer composer = new Composer(new ParserImpl(new StreamReader(yaml)), this.resolver);
    this.constructor.setComposer(composer);
    return composer.getSingleNode();
}
 

/**
 * Parse all YAML documents in a stream and produce corresponding
 * representation trees.
 *
 * @param yaml
 *         stream of YAML documents
 *
 * @return parsed root Nodes for all the specified YAML documents
 *
 * @see <a href="http://yaml.org/spec/1.1/#id859333">Processing Overview</a>
 */
public Iterable<Node> composeAll(Reader yaml)
{
    Composer composer = new Composer(new ParserImpl(new StreamReader(yaml)), this.resolver);
    this.constructor.setComposer(composer);
    Iterator<Node> result = new YamlComposerNodeIterator(composer);
    return new YamlNodeIterable(result);
}
 

/**
 * Parse the first YAML document in a stream and produce the corresponding
 * representation tree. (This is the opposite of the represent() method)
 * 
 * @see <a href="http://yaml.org/spec/1.1/#id859333">Figure 3.1. Processing
 *      Overview</a>
 * @param yaml
 *            YAML document
 * @return parsed root Node for the specified YAML document
 */
public Node compose(Reader yaml) {
    Composer composer = new Composer(new ParserImpl(new StreamReader(yaml)), resolver);
    constructor.setComposer(composer);
    return composer.getSingleNode();
}
 

/**
 * Parse the first YAML document in a stream and produce the corresponding
 * representation tree. (This is the opposite of the represent() method)
 * 
 * @see <a href="http://yaml.org/spec/1.1/#id859333">Figure 3.1. Processing
 *      Overview</a>
 * @param yaml
 *            YAML document
 * @return parsed root Node for the specified YAML document
 */
public Node compose(Reader yaml) {
    Composer composer = new Composer(new ParserImpl(new StreamReader(yaml)), resolver);
    constructor.setComposer(composer);
    return composer.getSingleNode();
}