Examples of com.google.caja.lexer.ExternalReference

com.google.caja.lexer.ExternalReference
A reference to an external resource from an input.
For example, parsing a file {@code x/y/foo.html} with contents:
```
 <script src="../z/bar.js"/> 
```
will result in an {@code ExternalReference} with:
- A {@link #getReferencePosition() reference position} which is the spanin {@code foo.html} where the reference occurred. This position contains,among other things, the URI {@code "x/y/foo.html"}.
- The target {@link #getUri() URI}, {@code "../z/bar.js"}.
Note that, in the case of HTML links (as in the above example), the URI is implicitly relative to the reference position; in other words, the author of {@code x/y/foo.html} meant to retrieve a script at{@code "x/z/bar.js"}. The {@code ExternalReference} itself, however, isoblivious to this level of interpretation. @author mikesamuel@gmail.com (Mike Samuel)

    URI javaUri = uri.toJavaUri();
    InputSource is = new InputSource(javaUri);
    MessageQueue mq = new SimpleMessageQueue();
    try {
      UriFetcher fetcher = makeFetcher(uri, container);
      ExternalReference extRef = new ExternalReference(javaUri,
          FilePosition.instance(is, /*lineNo*/ 1, /*charInFile*/ 1, /*charInLine*/ 1));
      // If the fetch fails, a UriFetchException is thrown and serialized as part of the
      // message queue.
      CharProducer cp = fetcher.fetch(extRef, mime).getTextualContent();
      ParseTreeNode ptn = parse(is, cp, mime, mq);

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    }


    FetchedData inputFetchedData;
    try {
      inputFetchedData = uriFetcher.fetch(
          new ExternalReference(inputUri, FilePosition.UNKNOWN),
          expectedInputContentType);
    } catch (UriFetcher.UriFetchException ex) {
      ex.toMessageQueue(mq);
      return null;
    }

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      URI relUri = new URI(uri);
      URI absUri = null;
      URI baseAddress = new URI(base);
      absUri = relUri.isAbsolute() ? relUri : baseAddress.resolve(relUri);
      return fetcher.fetch(
          new ExternalReference(absUri, baseAddress, relUri,
              FilePosition.UNKNOWN), "*/*").getTextualContent().toString();
    } catch (URISyntaxException ex) {
      return null;
    } catch (UnsupportedEncodingException ex) {
      return null;

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    try {
      if (null == meta) {
        return null;
      }
      FetchedData data = meta.getUriFetcher().fetch(
          new ExternalReference(is.getUri(), FilePosition.UNKNOWN), "*/*");
      return data.getTextualContent();
    } catch (UriFetchException e) {
      e.printStackTrace();
      // Failed heuristic, return null
    } catch (UnsupportedEncodingException e) {

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    URI javaUri = uri.toJavaUri();
    InputSource is = new InputSource(javaUri);
    MessageQueue mq = new SimpleMessageQueue();
    try {
      UriFetcher fetcher = makeFetcher(uri, container);
      ExternalReference extRef = new ExternalReference(javaUri,
          FilePosition.instance(is, /*lineNo*/ 1, /*charInFile*/ 1, /*charInLine*/ 1));
      // If the fetch fails, a UriFetchException is thrown and serialized as part of the
      // message queue.
      CharProducer cp = fetcher.fetch(extRef, mime).getTextualContent();
      ParseTreeNode ptn = parse(is, cp, mime, mq);

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    URI javaUri = uri.toJavaUri();
    InputSource is = new InputSource(javaUri);
    MessageQueue mq = new SimpleMessageQueue();
    try {
      UriFetcher fetcher = makeFetcher(uri, container);
      ExternalReference extRef = new ExternalReference(javaUri,
          FilePosition.instance(is, /*lineNo*/ 1, /*charInFile*/ 1, /*charInLine*/ 1));
      // If the fetch fails, a UriFetchException is thrown and serialized as part of the
      // message queue.
      CharProducer cp = fetcher.fetch(extRef, mime).getTextualContent();
      ParseTreeNode ptn = parse(is, cp, mime, mq);

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    URI javaUri = uri.toJavaUri();
    InputSource is = new InputSource(javaUri);
    MessageQueue mq = new SimpleMessageQueue();
    try {
      UriFetcher fetcher = makeFetcher(uri, container);
      ExternalReference extRef = new ExternalReference(javaUri,
          FilePosition.instance(is, /*lineNo*/ 1, /*charInFile*/ 1, /*charInLine*/ 1));
      // If the fetch fails, a UriFetchException is thrown and serialized as part of the
      // message queue.
      CharProducer cp = fetcher.fetch(extRef, mime).getTextualContent();
      ParseTreeNode ptn = parse(is, cp, mime, mq);

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                IhtmlMessageType.MALFORMED_URI, pos,
                MessagePart.Factory.valueOf(value));
            return noResult(attr);
          }
          if (meta.getUriPolicy() != null) {
            ExternalReference ref = new ExternalReference(uri, pos);
            String rewrittenUri = UriPolicyNanny.apply(
                meta.getUriPolicy(),
                ref, attr.attrInfo.getUriEffect(),
                attr.attrInfo.getLoaderType(),
                Collections.singletonMap(
                    UriPolicyHintKey.XML_ATTR.key,
                    attr.attrInfo.getKey().toString()));
            if (rewrittenUri == null) {
              mq.addMessage(
                  PluginMessageType.DISALLOWED_URI, pos,
                  MessagePart.Factory.valueOf(uri.toString()));
              return noResult(attr);
            }
            dynamicValue = StringLiteral.valueOf(
                ref.getReferencePosition(), rewrittenUri);
          } else {
            dynamicValue = (Expression) QuasiBuilder.substV(
                ""
                + "IMPORTS___./*@synthetic*/rewriteUriInAttribute___("
                + "    @value, @tagName, @attribName)",

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      URI relUri = new URI(uri);
      URI absUri = null;
      URI baseAddress = new URI(base);
      absUri = relUri.isAbsolute() ? relUri : baseAddress.resolve(relUri);
      return fetcher.fetch(
          new ExternalReference(absUri, baseAddress, relUri,
              FilePosition.UNKNOWN), "*/*").getTextualContent().toString();
    } catch (URISyntaxException ex) {
      return null;
    } catch (UnsupportedEncodingException ex) {
      return null;

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            String uriStr = content.getValue();
            try {
              URI baseUri = content.getFilePosition().source().getUri();
              URI relUri = new URI(uriStr);
              URI uri = baseUri.resolve(relUri);
              ExternalReference ref = new ExternalReference(
                  uri, baseUri, relUri, content.getFilePosition());
              Name propertyPart = propertyPart(node);  // TODO
              if (uriPolicy != null) {
                String rewritten = UriPolicyNanny.apply(
                    uriPolicy,

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