Example usage for org.springframework.beans.factory.xml BeanDefinitionParserDelegate VALUE_REF_ATTRIBUTE

Introduction

In this page you can find the example usage for org.springframework.beans.factory.xml BeanDefinitionParserDelegate VALUE_REF_ATTRIBUTE.

Prototype

String VALUE_REF_ATTRIBUTE

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Usage

From source file:org.eclipse.gemini.blueprint.blueprint.config.internal.BlueprintParser.java

/**
 * Parse a map element./* w w  w .  ja  va  2s.c  o m*/
 */
public Map<?, ?> parseMapElement(Element mapEle, BeanDefinition bd) {
    String defaultKeyType = mapEle.getAttribute(BeanDefinitionParserDelegate.KEY_TYPE_ATTRIBUTE);
    String defaultValueType = mapEle.getAttribute(BeanDefinitionParserDelegate.VALUE_TYPE_ATTRIBUTE);

    List<Element> entryEles = DomUtils.getChildElementsByTagName(mapEle,
            BeanDefinitionParserDelegate.ENTRY_ELEMENT);
    ManagedMap<Object, Object> map = new ManagedMap<Object, Object>(entryEles.size());
    map.setSource(extractSource(mapEle));
    map.setKeyTypeName(defaultKeyType);
    map.setValueTypeName(defaultValueType);
    map.setMergeEnabled(parseMergeAttribute(mapEle));

    for (Element entryEle : entryEles) {
        // Should only have one value child element: ref, value, list, etc.
        // Optionally, there might be a key child element.
        NodeList entrySubNodes = entryEle.getChildNodes();
        Element keyEle = null;
        Element valueEle = null;
        for (int j = 0; j < entrySubNodes.getLength(); j++) {
            Node node = entrySubNodes.item(j);
            if (node instanceof Element) {
                Element candidateEle = (Element) node;
                if (DomUtils.nodeNameEquals(candidateEle, BeanDefinitionParserDelegate.KEY_ELEMENT)) {
                    if (keyEle != null) {
                        error("<entry> element is only allowed to contain one <key> sub-element", entryEle);
                    } else {
                        keyEle = candidateEle;
                    }
                } else {
                    // Child element is what we're looking for.
                    if (valueEle != null) {
                        error("<entry> element must not contain more than one value sub-element", entryEle);
                    } else {
                        valueEle = candidateEle;
                    }
                }
            }
        }

        // Extract key from attribute or sub-element.
        Object key = null;
        boolean hasKeyAttribute = entryEle.hasAttribute(BeanDefinitionParserDelegate.KEY_ATTRIBUTE);
        boolean hasKeyRefAttribute = entryEle.hasAttribute(BeanDefinitionParserDelegate.KEY_REF_ATTRIBUTE);
        if ((hasKeyAttribute && hasKeyRefAttribute)
                || ((hasKeyAttribute || hasKeyRefAttribute)) && keyEle != null) {
            error("<entry> element is only allowed to contain either "
                    + "a 'key' attribute OR a 'key-ref' attribute OR a <key> sub-element", entryEle);
        }
        if (hasKeyAttribute) {
            key = buildTypedStringValueForMap(entryEle.getAttribute(BeanDefinitionParserDelegate.KEY_ATTRIBUTE),
                    defaultKeyType, entryEle);
        } else if (hasKeyRefAttribute) {
            String refName = entryEle.getAttribute(BeanDefinitionParserDelegate.KEY_REF_ATTRIBUTE);
            if (!StringUtils.hasText(refName)) {
                error("<entry> element contains empty 'key-ref' attribute", entryEle);
            }
            RuntimeBeanReference ref = new RuntimeBeanReference(refName);
            ref.setSource(extractSource(entryEle));
            key = ref;
        } else if (keyEle != null) {
            key = parseKeyElement(keyEle, bd, defaultKeyType);
        } else {
            error("<entry> element must specify a key", entryEle);
        }

        // Extract value from attribute or sub-element.
        Object value = null;
        boolean hasValueAttribute = entryEle.hasAttribute(BeanDefinitionParserDelegate.VALUE_ATTRIBUTE);
        boolean hasValueRefAttribute = entryEle.hasAttribute(BeanDefinitionParserDelegate.VALUE_REF_ATTRIBUTE);
        if ((hasValueAttribute && hasValueRefAttribute)
                || ((hasValueAttribute || hasValueRefAttribute)) && valueEle != null) {
            error("<entry> element is only allowed to contain either "
                    + "'value' attribute OR 'value-ref' attribute OR <value> sub-element", entryEle);
        }
        if (hasValueAttribute) {
            value = buildTypedStringValueForMap(
                    entryEle.getAttribute(BeanDefinitionParserDelegate.VALUE_ATTRIBUTE), defaultValueType,
                    entryEle);
        } else if (hasValueRefAttribute) {
            String refName = entryEle.getAttribute(BeanDefinitionParserDelegate.VALUE_REF_ATTRIBUTE);
            if (!StringUtils.hasText(refName)) {
                error("<entry> element contains empty 'value-ref' attribute", entryEle);
            }
            RuntimeBeanReference ref = new RuntimeBeanReference(refName);
            ref.setSource(extractSource(entryEle));
            value = ref;
        } else if (valueEle != null) {
            value = parsePropertySubElement(valueEle, bd, defaultValueType);
        } else {
            error("<entry> element must specify a value", entryEle);
        }

        // Add final key and value to the Map.
        map.put(key, value);
    }

    return map;
}

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