Java ObjectFactory类代码示例

import com.sun.org.apache.xerces.internal.utils.ObjectFactory; //导入依赖的package包/类
public boolean registerPreparser(String grammarType, XMLGrammarLoader loader) {
    if(loader == null) { // none specified!
        if(KNOWN_LOADERS.containsKey(grammarType)) {
            // got one; just instantiate it...
            String loaderName = (String)KNOWN_LOADERS.get(grammarType);
            try {
                XMLGrammarLoader gl = (XMLGrammarLoader)(ObjectFactory.newInstance(loaderName, true));
                fLoaders.put(grammarType, gl);
            } catch (Exception e) {
                return false;
            }
            return true;
        }
        return false;
    }
    // were given one
    fLoaders.put(grammarType, loader);
    return true;
}
 

import com.sun.org.apache.xerces.internal.utils.ObjectFactory; //导入依赖的package包/类
/**
 * DOM Level 3 WD - Experimental.
 */
public Object getFeature(String feature, String version) {
    if (singleton.hasFeature(feature, version)) {
        if ((feature.equalsIgnoreCase("+XPath"))) {
            try {
                Class xpathClass = ObjectFactory.findProviderClass(
                    "com.sun.org.apache.xpath.internal.domapi.XPathEvaluatorImpl", true);
                // Check if the DOM XPath implementation implements
                // the interface org.w3c.dom.XPathEvaluator
                Class interfaces[] = xpathClass.getInterfaces();
                for (int i = 0; i < interfaces.length; i++) {
                    if (interfaces[i].getName().equals(
                        "org.w3c.dom.xpath.XPathEvaluator")) {
                        return xpathClass.newInstance();
                    }
                }
            } catch (Exception e) {
                return null;
            }
        } else {
            return singleton;
        }
    }
    return null;
}
 

import com.sun.org.apache.xerces.internal.utils.ObjectFactory; //导入依赖的package包/类
/**
 * Get an instance of DTDDVFactory implementation.
 *
 * @param factoryClass  name of the implementation to load.
 * @return  an instance of DTDDVFactory implementation
 * @exception DVFactoryException  cannot create an instance of the specified
 *                                class name or the default class name
 */
public static final DTDDVFactory getInstance(String factoryClass) throws DVFactoryException {
    try {
        if (DEFAULT_FACTORY_CLASS.equals(factoryClass)) {
            return new DTDDVFactoryImpl();
        } else if (XML11_DATATYPE_VALIDATOR_FACTORY.equals(factoryClass)) {
            return new XML11DTDDVFactoryImpl();
        } else {
            //fall back for compatibility
            return (DTDDVFactory)
                (ObjectFactory.newInstance(factoryClass, true));
        }
    }
    catch (ClassCastException e) {
        throw new DVFactoryException("DTD factory class " + factoryClass + " does not extend from DTDDVFactory.");
    }
}
 

import com.sun.org.apache.xerces.internal.utils.ObjectFactory; //导入依赖的package包/类
/**
 * This method allows the programmer to decide which document
 * factory to use when constructing the DOM tree. However, doing
 * so will lose the functionality of the default factory. Also,
 * a document class other than the default will lose the ability
 * to defer node expansion on the DOM tree produced.
 *
 * @param documentClassName The fully qualified class name of the
 *                      document factory to use when constructing
 *                      the DOM tree.
 *
 * @see #getDocumentClassName
 * @see #DEFAULT_DOCUMENT_CLASS_NAME
 */
protected void setDocumentClassName (String documentClassName) {

    // normalize class name
    if (documentClassName == null) {
        documentClassName = DEFAULT_DOCUMENT_CLASS_NAME;
    }

    if (!documentClassName.equals(DEFAULT_DOCUMENT_CLASS_NAME) &&
        !documentClassName.equals(PSVI_DOCUMENT_CLASS_NAME)) {
        // verify that this class exists and is of the right type
        try {
            Class _class = ObjectFactory.findProviderClass (documentClassName, true);
            //if (!_class.isAssignableFrom(Document.class)) {
            if (!Document.class.isAssignableFrom (_class)) {
                throw new IllegalArgumentException (
                    DOMMessageFormatter.formatMessage(
                    DOMMessageFormatter.DOM_DOMAIN,
                    "InvalidDocumentClassName", new Object [] {documentClassName}));
            }
        }
        catch (ClassNotFoundException e) {
            throw new IllegalArgumentException (
                DOMMessageFormatter.formatMessage(
                DOMMessageFormatter.DOM_DOMAIN,
                "MissingDocumentClassName", new Object [] {documentClassName}));
        }
    }

    // set document class name
    fDocumentClassName = documentClassName;
    if (!documentClassName.equals (DEFAULT_DOCUMENT_CLASS_NAME)) {
        fDeferNodeExpansion = false;
    }

}
 

import com.sun.org.apache.xerces.internal.utils.ObjectFactory; //导入依赖的package包/类
/**
 * Get an instance of DTDDVFactory implementation.
 *
 * @param factoryClass  name of the implementation to load.
 * @return  an instance of DTDDVFactory implementation
 * @exception DVFactoryException  cannot create an instance of the specified
 *                                class name or the default class name
 */
public static final DTDDVFactory getInstance(String factoryClass) throws DVFactoryException {
    try {
        // if the class name is not specified, use the default one
        return (DTDDVFactory)
            (ObjectFactory.newInstance(factoryClass, true));
    }
    catch (ClassCastException e) {
        throw new DVFactoryException("DTD factory class " + factoryClass + " does not extend from DTDDVFactory.");
    }
}
 

import com.sun.org.apache.xerces.internal.utils.ObjectFactory; //导入依赖的package包/类
/**
 * Get an instance of SchemaDVFactory implementation.
 *
 * @param factoryClass   name of the schema factory implementation to instantiate.
 * @return  an instance of SchemaDVFactory implementation
 * @exception DVFactoryException  cannot create an instance of the specified
 *                                class name or the default class name
 */
public static synchronized final SchemaDVFactory getInstance(String factoryClass) throws DVFactoryException {

    try {
        // if the class name is not specified, use the default one
        return (SchemaDVFactory)(ObjectFactory.newInstance(factoryClass, true));
    } catch (ClassCastException e4) {
        throw new DVFactoryException("Schema factory class " + factoryClass + " does not extend from SchemaDVFactory.");
    }

}
 

import com.sun.org.apache.xerces.internal.utils.ObjectFactory; //导入依赖的package包/类
/**
 * @since DOM Level 3
 */
public Object getFeature(String feature, String version) {

    boolean anyVersion = version == null || version.length() == 0;

    // if a plus sign "+" is prepended to any feature name, implementations
    // are considered in which the specified feature may not be directly
    // castable DOMImplementation.getFeature(feature, version). Without a
    // plus, only features whose interfaces are directly castable are
    // considered.
    if ((feature.equalsIgnoreCase("+XPath"))
        && (anyVersion || version.equals("3.0"))) {

        // If an XPathEvaluator was created previously
        // return it otherwise create a new one.
        if (fXPathEvaluator != null) {
            return fXPathEvaluator;
        }

        try {
            Class xpathClass = ObjectFactory.findProviderClass (
                    "com.sun.org.apache.xpath.internal.domapi.XPathEvaluatorImpl", true);
            Constructor xpathClassConstr =
                xpathClass.getConstructor(new Class[] { Document.class });

            // Check if the DOM XPath implementation implements
            // the interface org.w3c.dom.XPathEvaluator
            Class interfaces[] = xpathClass.getInterfaces();
            for (int i = 0; i < interfaces.length; i++) {
                if (interfaces[i].getName().equals(
                "org.w3c.dom.xpath.XPathEvaluator")) {
                    fXPathEvaluator = xpathClassConstr.newInstance(new Object[] { this });
                    return fXPathEvaluator;
                }
            }
            return null;
        } catch (Exception e) {
            return null;
        }
    }
    return super.getFeature(feature, version);
}
 

import com.sun.org.apache.xerces.internal.utils.ObjectFactory; //导入依赖的package包/类
/**
 * Test if the DOM implementation supports a specific "feature" --
 * currently meaning language and level thereof.
 *
 * @param feature The package name of the feature to test.
 * In Level 1, supported values are "HTML" and "XML" (case-insensitive).
 * At this writing, com.sun.org.apache.xerces.internal.dom supports only XML.
 *
 * @param version The version number of the feature being tested.
 * This is interpreted as "Version of the DOM API supported for the
 * specified Feature", and in Level 1 should be "1.0"
 *
 * @return true iff this implementation is compatable with the specified
 * feature and version.
 */
public boolean hasFeature(String feature, String version) {

    boolean anyVersion = version == null || version.length() == 0;

    // check if Xalan implementation is around and if yes report true for supporting
    // XPath API
    // if a plus sign "+" is prepended to any feature name, implementations
    // are considered in which the specified feature may not be directly
    // castable DOMImplementation.getFeature(feature, version). Without a
    // plus, only features whose interfaces are directly castable are considered.
    if ((feature.equalsIgnoreCase("+XPath"))
        && (anyVersion || version.equals("3.0"))) {
        try {
            Class xpathClass = ObjectFactory.findProviderClass(
                "com.sun.org.apache.xpath.internal.domapi.XPathEvaluatorImpl", true);

        // Check if the DOM XPath implementation implements
        // the interface org.w3c.dom.XPathEvaluator
        Class interfaces[] = xpathClass.getInterfaces();
        for (int i = 0; i < interfaces.length; i++) {
            if (interfaces[i].getName().equals(
                "org.w3c.dom.xpath.XPathEvaluator")) {
                return true;
            }
        }
        } catch (Exception e) {
            return false;
        }
        return true;
    }
    if (feature.startsWith("+")) {
        feature = feature.substring(1);
    }
    return (
        feature.equalsIgnoreCase("Core")
            && (anyVersion
                || version.equals("1.0")
                || version.equals("2.0")
                || version.equals("3.0")))
                || (feature.equalsIgnoreCase("XML")
            && (anyVersion
                || version.equals("1.0")
                || version.equals("2.0")
                || version.equals("3.0")))
                || (feature.equalsIgnoreCase("LS")
            && (anyVersion || version.equals("3.0")));
}
 

import com.sun.org.apache.xerces.internal.utils.ObjectFactory; //导入依赖的package包/类
/**
 * @since DOM Level 3
 */
public Object getFeature(String feature, String version) {

    boolean anyVersion = version == null || version.length() == 0;

    // if a plus sign "+" is prepended to any feature name, implementations
    // are considered in which the specified feature may not be directly
    // castable DOMImplementation.getFeature(feature, version). Without a
    // plus, only features whose interfaces are directly castable are
    // considered.
    if ((feature.equalsIgnoreCase("+XPath"))
            && (anyVersion || version.equals("3.0"))) {

        // If an XPathEvaluator was created previously
        // return it otherwise create a new one.
        if (fXPathEvaluator != null) {
            return fXPathEvaluator;
        }

        try {
            Class xpathClass = ObjectFactory.findProviderClass (
                    "com.sun.org.apache.xpath.internal.domapi.XPathEvaluatorImpl", true);
            Constructor xpathClassConstr =
                xpathClass.getConstructor(new Class[] { Document.class });

            // Check if the DOM XPath implementation implements
            // the interface org.w3c.dom.XPathEvaluator
            Class interfaces[] = xpathClass.getInterfaces();
            for (int i = 0; i < interfaces.length; i++) {
                if (interfaces[i].getName().equals(
                        "org.w3c.dom.xpath.XPathEvaluator")) {
                    fXPathEvaluator = xpathClassConstr.newInstance(new Object[] { this });
                    return fXPathEvaluator;
                }
            }
            return null;
        } catch (Exception e) {
            return null;
        }
    }
    return super.getFeature(feature, version);
}