Examples of com.google.gxp.compiler.schema.Schema

com.google.gxp.compiler.schema.Schema
A Schema represents an output language like XHTML, RSS, VoiceXML or some other XML language that you might want to generate via GXP. A schema can also optionally support an "SGML" mode. This is probably only useful for XHTML, whose SGML counterpart is HTML. Making it general is slightly easier (and less ugly) than special-casing it, so there you have it.
Schemas are generally specified in an XML file which is then parsed with SchemaParser.
Schemas are used by the GXP compiler to do input vaidation (for example, checking that an attribute really exists) and also for providing other special knowledge about attributes and elements. (eg: which attributes are boolean, and what doctypes are supported)
Most GXP users will probably not need to write schemas. Only one schema is required per output format. If you feel the urge to write a schema, first investigate to see if someone has already written one for the same language.

      } else {
        content = getCollapsableContent(attrMap);
      }


      String innerContentTypeString = validator.getInnerContentType();
      Schema innerSchema = (innerContentTypeString == null)
          ? null
          : schemaFactory.fromContentTypeName(innerContentTypeString);


      List<String> bundles = getBundles(attrMap);

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            // if the attribute validator indicates an inner content type then
            // set this on the attribute
            String innerContentTypeString = attrValidator.getContentType();
            if (innerContentTypeString != null) {
              Schema innerSchema = schemaFactory.fromContentTypeName(innerContentTypeString);
              attr = attr.withInnerSchema(innerSchema);
            }


            result.add(attr);
          }

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                                                         this)));
      }


      @Override
      public Expression visitOutputElement(OutputElement element) {
        Schema innerSchema = element.getInnerSchema();
        Visitor contentVisitor = (innerSchema == null)
            ? this : visitor(innerSchema);
        return postProcess(
            element.withAttributesAndContent(
                Util.map(element.getAttributes(), getAttributeFunction()),

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      }


      @Override
      public Attribute visitAttribute(Attribute attr) {
        attrStack.push(attr);
        Schema schema = attr.getInnerSchema();
        if (schema != null) {
          Visitor visitor = visitor(schema);
          attr = attr.withValue(attr.getValue().acceptVisitor(visitor));
        }

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      @Override
      public Expression visitUnextractedMessage(UnextractedMessage msg) {


        // if <gxp:msg> didn't have a content-type attribute,
        // it takes on the schema of its surrounding context
        Schema msgSchema = msg.getSchema();
        if (msgSchema == null) {
          msgSchema = schema.getMsgSchema();
        }


        Expression result = msg.withContentAndSchema(

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    if (clauses.isEmpty()) {
      throw new IllegalArgumentException("At least one clause is required.");
    }
    if (schema != null) {
      for (Clause clause : clauses) {
        Schema clauseSchema = clause.getExpression().getSchema();
        if (!schema.allows(clauseSchema)) {
          throw new IllegalArgumentException(
              "Incompatible schemas: " + clauseSchema + " clause in "
              + schema + " conditional");
        }

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      exactMappings.put(result.getUri(), result);
    }


    // check for a schema namespace
    if (result == null) {
      Schema schema = schemaFactory.fromNamespaceUri(nsUri);
      if (schema != null) {
        result = new OutputNamespace(schema);
        exactMappings.put(result.getUri(), result);
      }
    }

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      exactMappings.put(result.getUri(), result);
    }


    // check for a schema namespace
    if (result == null) {
      Schema schema = schemaFactory.fromNamespaceUri(nsUri);
      if (schema != null) {
        result = new OutputNamespace(schema);
        exactMappings.put(result.getUri(), result);
      }
    }

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      } else {
        node = attr;
        contentType = attr.getValue().getStaticString(alertSink, defaultValue);
      }


      Schema schema = (contentType == null)
          ? null
          : schemaFactory.fromContentTypeName(contentType);


      if (schema == null && contentType != null) {
        alertSink.add(new UnknownContentTypeError(node, contentType));

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      boolean hidden = attrMap.getBooleanValue("hidden");
      // TODO(laurence): coerce content to HTML
      Expression content = getCollapsableContent(attrMap);


      ContentType contentType = createContentType(node, null);
      Schema schema = (contentType == null) ? null : contentType.getSchema();


      output.accumulate(
          new UnextractedMessage(node, schema, name, meaning, comment, hidden, content));
      return null;
    }

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com.google.gxp.compiler.GxpcTestCaseTest

com.google.gxp.compiler.parser.NamespaceSet

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