blueprint/blueprint-cm/src/main/java/org/apache/aries/blueprint/compendium/cm/CmNamespaceHandler.java [649:668]:
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    public List<String> parseInterfaceNames(Element element) {
        List<String> interfaceNames = new ArrayList<String>();
        NodeList nl = element.getChildNodes();
        for (int i = 0; i < nl.getLength(); i++) {
            Node node = nl.item(i);
            if (node instanceof Element) {
                Element e = (Element) node;
                if (nodeNameEquals(e, VALUE_ELEMENT)) {
                    String v = getTextValue(e).trim();
                    if (interfaceNames.contains(v)) {
                        throw new ComponentDefinitionException("The element " + INTERFACES_ELEMENT + " should not contain the same interface twice");
                    }
                    interfaceNames.add(getTextValue(e));
                } else {
                    throw new ComponentDefinitionException("Unsupported element " + e.getNodeName() + " inside an " + INTERFACES_ELEMENT + " element");
                }
            }
        }
        return interfaceNames;
    }
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blueprint/blueprint-parser/src/main/java/org/apache/aries/blueprint/parser/Parser.java [1195:1214]:
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    public List<String> parseInterfaceNames(Element element) {
        List<String> interfaceNames = new ArrayList<String>();
        NodeList nl = element.getChildNodes();
        for (int i = 0; i < nl.getLength(); i++) {
            Node node = nl.item(i);
            if (node instanceof Element) {
                Element e = (Element) node;
                if (nodeNameEquals(e, VALUE_ELEMENT)) {
                    String v = getTextValue(e).trim();
                    if (interfaceNames.contains(v)) {
                        throw new ComponentDefinitionException("The element " + INTERFACES_ELEMENT + " should not contain the same interface twice");
                    }
                    interfaceNames.add(getTextValue(e));
                } else {
                    throw new ComponentDefinitionException("Unsupported element " + e.getNodeName() + " inside an " + INTERFACES_ELEMENT + " element");
                }
            }
        }
        return interfaceNames;
    }
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