Java Reference.get方法代码示例

import javax.naming.Reference; //导入方法依赖的package包/类
/**
 * Create a new DataSource instance.
 * 
 * @param obj
 *            The reference object describing the DataSource
 */
@Override
public Object getObjectInstance(Object obj, Name name, Context nameCtx, Hashtable<?, ?> environment)
		throws NamingException {
	Object result = super.getObjectInstance(obj, name, nameCtx, environment);
	// Can we process this request?
	if (result != null) {
		Reference ref = (Reference) obj;
		RefAddr userAttr = ref.get("username");
		RefAddr passAttr = ref.get("password");
		if (userAttr.getContent() != null && passAttr.getContent() != null) {
			result = wrapDataSource(result, userAttr.getContent().toString(), passAttr.getContent().toString());
		}
	}
	return result;
}
 

import javax.naming.Reference; //导入方法依赖的package包/类
/**
 * Create a new DataSource instance.
 * 
 * @param obj The reference object describing the DataSource
 */
@Override
public Object getObjectInstance(Object obj, Name name, Context nameCtx, Hashtable<?,?> environment)
    throws NamingException {
    Object result = super.getObjectInstance(obj, name, nameCtx, environment);
    // Can we process this request?
    if (result!=null) {
        Reference ref = (Reference) obj;
        RefAddr userAttr = ref.get("username");
        RefAddr passAttr = ref.get("password");
        if (userAttr.getContent()!=null && passAttr.getContent()!=null) {
            result = wrapDataSource(result,userAttr.getContent().toString(), passAttr.getContent().toString());
        }
    }
    return result;
}
 

import javax.naming.Reference; //导入方法依赖的package包/类
/**
 * <p>Create and return a new <code>MemoryUserDatabase</code> instance
 * that has been configured according to the properties of the
 * specified <code>Reference</code>.  If you instance can be created,
 * return <code>null</code> instead.</p>
 *
 * @param obj The possibly null object containing location or
 *  reference information that can be used in creating an object
 * @param name The name of this object relative to <code>nameCtx</code>
 * @param nameCtx The context relative to which the <code>name</code>
 *  parameter is specified, or <code>null</code> if <code>name</code>
 *  is relative to the default initial context
 * @param environment The possibly null environment that is used in
 *  creating this object
 */
@Override
public Object getObjectInstance(Object obj, Name name, Context nameCtx,
                                Hashtable<?,?> environment)
    throws Exception {

    // We only know how to deal with <code>javax.naming.Reference</code>s
    // that specify a class name of "org.apache.catalina.UserDatabase"
    if ((obj == null) || !(obj instanceof Reference)) {
        return (null);
    }
    Reference ref = (Reference) obj;
    if (!"org.apache.catalina.UserDatabase".equals(ref.getClassName())) {
        return (null);
    }

    // Create and configure a MemoryUserDatabase instance based on the
    // RefAddr values associated with this Reference
    MemoryUserDatabase database = new MemoryUserDatabase(name.toString());
    RefAddr ra = null;

    ra = ref.get("pathname");
    if (ra != null) {
        database.setPathname(ra.getContent().toString());
    }

    ra = ref.get("readonly");
    if (ra != null) {
        database.setReadonly(Boolean.parseBoolean(ra.getContent().toString()));
    }

    // Return the configured database instance
    database.open();
    // Don't try something we know won't work
    if (!database.getReadonly())
        database.save();
    return (database);

}
 

import javax.naming.Reference; //导入方法依赖的package包/类
void initializeFrom(Reference ref, ExceptionInterceptor exceptionInterceptor) throws SQLException {
    RefAddr refAddr = ref.get(getPropertyName());

    if (refAddr != null) {
        String refContentAsString = (String) refAddr.getContent();

        initializeFrom(refContentAsString, exceptionInterceptor);
    }
}
 

import javax.naming.Reference; //导入方法依赖的package包/类
private void removeFromRef(Reference ref, String key) {
    int size = ref.size();

    for (int i = 0; i < size; i++) {
        RefAddr refAddr = ref.get(i);
        if (refAddr.getType().equals(key)) {
            ref.remove(i);
            break;
        }
    }
}
 

import javax.naming.Reference; //导入方法依赖的package包/类
/**
 * Create a new DataSource instance.
 *
 * @param obj The reference object describing the DataSource
 */
@Override
public Object getObjectInstance(Object obj, Name name, Context nameCtx,
        Hashtable<?,?> environment) throws NamingException {

    if (!(obj instanceof ResourceLinkRef)) {
        return null;
    }

    // Can we process this request?
    Reference ref = (Reference) obj;

    // Read the global ref addr
    String globalName = null;
    RefAddr refAddr = ref.get(ResourceLinkRef.GLOBALNAME);
    if (refAddr != null) {
        globalName = refAddr.getContent().toString();
        // Confirm that the current web application is currently configured
        // to access the specified global resource
        if (!validateGlobalResourceAccess(globalName)) {
            return null;
        }
        Object result = null;
        result = globalContext.lookup(globalName);
        // Check the expected type
        String expectedClassName = ref.getClassName();
        if (expectedClassName == null) {
            throw new IllegalArgumentException(
                    sm.getString("resourceLinkFactory.nullType", name, globalName));
        }
        try {
            Class<?> expectedClazz = Class.forName(
                    expectedClassName, true, Thread.currentThread().getContextClassLoader());
            if (!expectedClazz.isAssignableFrom(result.getClass())) {
                throw new IllegalArgumentException(sm.getString("resourceLinkFactory.wrongType",
                        name, globalName, expectedClassName, result.getClass().getName()));
            }
        } catch (ClassNotFoundException e) {
            throw new IllegalArgumentException(sm.getString("resourceLinkFactory.unknownType",
                    name, globalName, expectedClassName), e);
        }
        return result;
    }

    return null;
}
 

import javax.naming.Reference; //导入方法依赖的package包/类
/**
 * <p>Create and return a new <code>BasicDataSource</code> instance.  If no
 * instance can be created, return <code>null</code> instead.</p>
 *
 * @param obj The possibly null object containing location or
 *  reference information that can be used in creating an object
 * @param name The name of this object relative to <code>nameCtx</code>
 * @param nameCtx The context relative to which the <code>name</code>
 *  parameter is specified, or <code>null</code> if <code>name</code>
 *  is relative to the default initial context
 * @param environment The possibly null environment that is used in
 *  creating this object
 *
 * @exception Exception if an exception occurs creating the instance
 */
@Override
public Object getObjectInstance(Object obj, Name name, Context nameCtx,
                                Hashtable<?,?> environment) throws Exception {

    // We only know how to deal with <code>javax.naming.Reference</code>s
    // that specify a class name of "javax.sql.DataSource"
    if ((obj == null) || !(obj instanceof Reference)) {
        return null;
    }
    Reference ref = (Reference) obj;
    boolean XA = false;
    boolean ok = false;
    if ("javax.sql.DataSource".equals(ref.getClassName())) {
        ok = true;
    }
    if ("javax.sql.XADataSource".equals(ref.getClassName())) {
        ok = true;
        XA = true;
    }
    if (org.apache.tomcat.jdbc.pool.DataSource.class.getName().equals(ref.getClassName())) {
        ok = true;
    }

    if (!ok) {
        log.warn(ref.getClassName()+" is not a valid class name/type for this JNDI factory.");
        return null;
    }


    Properties properties = new Properties();
    for (int i = 0; i < ALL_PROPERTIES.length; i++) {
        String propertyName = ALL_PROPERTIES[i];
        RefAddr ra = ref.get(propertyName);
        if (ra != null) {
            String propertyValue = ra.getContent().toString();
            properties.setProperty(propertyName, propertyValue);
        }
    }

    return createDataSource(properties,nameCtx,XA);
}
 

import javax.naming.Reference; //导入方法依赖的package包/类
/**
 * Create a new DataSource instance.
 *
 * @param obj
 *            The reference object describing the DataSource
 */
@Override
public Object getObjectInstance(Object obj, Name name, Context nameCtx, Hashtable<?, ?> environment)
		throws NamingException {

	if (!(obj instanceof ResourceLinkRef)) {
		return null;
	}

	// Can we process this request?
	Reference ref = (Reference) obj;

	// Read the global ref addr
	String globalName = null;
	RefAddr refAddr = ref.get(ResourceLinkRef.GLOBALNAME);
	if (refAddr != null) {
		globalName = refAddr.getContent().toString();
		// Confirm that the current web application is currently configured
		// to access the specified global resource
		if (!validateGlobalResourceAccess(globalName)) {
			return null;
		}
		Object result = null;
		result = globalContext.lookup(globalName);
		// Check the expected type
		String expectedClassName = ref.getClassName();
		if (expectedClassName == null) {
			throw new IllegalArgumentException(sm.getString("resourceLinkFactory.nullType", name, globalName));
		}
		try {
			Class<?> expectedClazz = Class.forName(expectedClassName, true,
					Thread.currentThread().getContextClassLoader());
			if (!expectedClazz.isAssignableFrom(result.getClass())) {
				throw new IllegalArgumentException(sm.getString("resourceLinkFactory.wrongType", name, globalName,
						expectedClassName, result.getClass().getName()));
			}
		} catch (ClassNotFoundException e) {
			throw new IllegalArgumentException(
					sm.getString("resourceLinkFactory.unknownType", name, globalName, expectedClassName), e);
		}
		return result;
	}

	return null;
}
 

import javax.naming.Reference; //导入方法依赖的package包/类
private String nullSafeRefAddrStringGet(String referenceName, Reference ref) {
    RefAddr refAddr = ref.get(referenceName);

    String asString = refAddr != null ? (String) refAddr.getContent() : null;

    return asString;
}