Java Doc for Defense.java in  » Library » Tapestry » org » apache » tapestry » ioc » internal » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Library » Tapestry » org.apache.tapestry.ioc.internal.util   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.tapestry.ioc.internal.util.Defense Defense final public class Defense (Code) Static utility methods for defensive programming. Method Summary public static  T cast(Object parameterValue, Class<T> type, String parameterName)      Checks that the provided value is not null, and may be cast to the desired type. public static  String notBlank(String value, String parameterName)      Checks that a parameter value is not null and not empty. public static  T notNull(T value, String parameterName)      Checks that a method parameter value is not null, and returns it. Method Detail cast public static T cast(Object parameterValue, Class<T> type, String parameterName)(Code) Checks that the provided value is not null, and may be cast to the desired type. < Parameters:   T - > Parameters:   parameterValue - Parameters:   type - Parameters:   parameterName - throws:   IllegalArgumentException - if the value is null, or is not assignable to the indicated type the casted value notBlank public static String notBlank(String value, String parameterName)(Code) Checks that a parameter value is not null and not empty. Parameters:   value - value to check (which is returned) Parameters:   parameterName - the name of the parameter, used for exception messages the value, trimmed, if non-blank throws:   IllegalArgumentException - if the value is null or empty notNull public static T notNull(T value, String parameterName)(Code) Checks that a method parameter value is not null, and returns it. This method is used in situations where some of the parameters to a method are allowed to be null and other's arent. In that situation, the method will be annotated with SuppressNullCheck , and the relevent null checks will occur inside the method implementation. < Parameters:   T - >the value type Parameters:   value - the value (which is checked to ensure non-nullness) Parameters:   parameterName - the name of the parameter, used for exception messages the value throws:   IllegalArgumentException - if the value is null Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)