Examples with Constraint com.cosylab.logging.engine.Filter.Constraint used on opensource projects

Example 1 with Constraint

use of com.cosylab.logging.engine.Filter.Constraint in project ACS by ACS-Community.

the class FiltersVector method loadFilters.

/**
	 * Load filters 
	 * In case of errors an exception is thrown
	 * 
	 * @param f The xml file to parse (java.io.File) 
	 * @param eraseFilters If true existing filters will be deleted before loading
	 * @param fileName Is the name of the file (it is usually null and the name is
	 *                 read from the parameter f. However when this method is called
	 *                 recursively we need to pass the name because the file we're reading
	 *                 is a temporary file (generated by converting the original file)
	 * @throws <code>Exception</code> In case of error loading the filters
	 */
public void loadFilters(File f, boolean eraseFilters, String fileName) throws Exception {
    Document doc;
    FileInputStream fStream;
    fStream = new FileInputStream(f);
    JAXPDOMAdapter adapter = new JAXPDOMAdapter();
    DOMBuilder builder = new DOMBuilder();
    doc = builder.build(adapter.getDocument(fStream, false));
    Element root = doc.getRootElement();
    if (root.getName().compareToIgnoreCase("FILTER_LIST") != 0 && root.getName().compareToIgnoreCase("FILTERS") != 0) {
        // We show a message to the user and abort
        throw new Exception("Wrong xml file: the root is " + root.getName() + " instead of FILTER_LIST");
    } else if (root.getName().compareToIgnoreCase("FILTER_LIST") == 0) {
        // The file is an old version (show a message to the user to explain what's
        // happening and how to avoid this message appears again in future
        System.err.println("The format of this filter file is deprecated. \nSave the filters to avoid this message appears in future.");
        // Convert the format of the file
        File newFormatFile = convertOldFilterFile(f);
        if (newFormatFile == null) {
            // Something went wrong while converting: abort
            throw new Exception("Error converting the file to the new format");
        } else {
            // Recursively call loadFilters but now the file has
            // the new format
            loadFilters(newFormatFile, eraseFilters, f.getAbsolutePath());
            return;
        }
    }
    Element filtersElement = root.getChild("FILTER_LIST");
    // No filters defined
    if (filtersElement == null)
        return;
    List children = filtersElement.getChildren("FILTER");
    // Check if the vector has elements
    if (children == null || children.size() == 0) {
        return;
    }
    if (eraseFilters) {
        // The user whish to substitute the existing filters
        // with those he's loading
        clear();
    }
    // Read all the filters from the file
    Iterator it = children.iterator();
    while (it.hasNext()) {
        // Temporary Strings to store values read from the file
        String lethalStr = null;
        String notStr = null;
        String minStr = null;
        String maxStr = null;
        String exactStr = null;
        String wcharStr = null;
        String fieldStr = null;
        Boolean enabled = null;
        Element element = (Element) it.next();
        String type = element.getAttributeValue("type");
        Constraint constraint = Constraint.fromName(type);
        Element lethalElement = element.getChild("LETHAL");
        if (lethalElement != null) {
            lethalStr = lethalElement.getText();
        }
        Element notElement = element.getChild("APPLYNOT");
        if (notElement != null) {
            notStr = notElement.getText();
        }
        Element minElement = element.getChild("MIN");
        String minType = null;
        if (minElement != null) {
            minStr = minElement.getText();
            minType = minElement.getAttributeValue("class");
        }
        Element maxElement = element.getChild("MAX");
        String maxType = null;
        if (maxElement != null) {
            maxStr = maxElement.getText();
            maxType = maxElement.getAttributeValue("class");
        }
        Element exactElement = element.getChild("EXACT");
        String exactType = null;
        if (exactElement != null) {
            exactStr = exactElement.getText();
            exactType = exactElement.getAttributeValue("class");
        }
        Element wcharElement = element.getChild("WILDCHAR");
        if (wcharElement != null) {
            wcharStr = wcharElement.getText();
        }
        Element fieldElement = element.getChild("FIELD");
        if (fieldElement != null) {
            fieldStr = fieldElement.getText();
        }
        // Build the Field.
        LogField field = LogField.fromName(fieldStr);
        if (field == null) {
            // Ooops the field has not been found
            // Check if this String contains an Integer representing the
            // position of this field in the enum LogField (it was in the old format)
            Integer i = Integer.parseInt(fieldStr);
            field = LogField.values()[i];
        }
        Element enabledElement = element.getChild("ENABLED");
        if (enabledElement != null) {
            enabled = new Boolean(enabledElement.getText());
        } else {
            // Tag not found: enable the filter per default
            enabled = Boolean.TRUE;
        }
        // Build the filter
        Filter filter = Filter.buildFilter(constraint, field, lethalStr, notStr, minStr, minType, maxStr, maxType, exactStr, exactType, wcharStr);
        // bulidFilter throws an exception but ner return a null filter
        if (filter == null) {
            throw new IllegalStateException("The filter should not be null");
        }
        addFilter(filter, enabled);
    }
}