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/*
* Copyright 2009 Mike Cumings
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.kenai.jbosh;
/**
* Abstract base class for attribute implementations based on {@code Integer}
* types. Additional support for parsing of integer values from their
* {@code String} representations as well as callback handling of value
* validity checks are also provided.
*/
abstract class AbstractIntegerAttr extends AbstractAttr<Integer> {
/**
* Creates a new attribute object.
*
* @param val attribute value
* @throws BOSHException on parse or validation failure
*/
protected AbstractIntegerAttr(final int val) throws BOSHException {
super(Integer.valueOf(val));
}
/**
* Creates a new attribute object.
*
* @param val attribute value in string form
* @throws BOSHException on parse or validation failure
*/
protected AbstractIntegerAttr(final String val) throws BOSHException {
super(parseInt(val));
}
/**
* Utility method intended to be called by concrete implementation
* classes from within the {@code check()} method when the concrete
* class needs to ensure that the integer value does not drop below
* the specified minimum value.
*
* @param minVal minimum value to allow
* @throws BOSHException if the integer value is below the specific
* minimum
*/
protected final void checkMinValue(int minVal) throws BOSHException {
int intVal = getValue();
if (intVal < minVal) {
throw(new BOSHException(
"Illegal attribute value '" + intVal + "' provided. "
+ "Must be >= " + minVal));
}
}
/**
* Utility method to parse a {@code String} into an {@code Integer},
* converting any possible {@code NumberFormatException} thrown into
* a {@code BOSHException}.
*
* @param str string to parse
* @return integer value
* @throws BOSHException on {@code NumberFormatException}
*/
private static int parseInt(final String str) throws BOSHException {
try {
return Integer.parseInt(str);
} catch (NumberFormatException nfx) {
throw(new BOSHException(
"Could not parse an integer from the value provided: "
+ str,
nfx));
}
}
/**
* Returns the native {@code int} value of the underlying {@code Integer}.
* Will throw {@code NullPointerException} if the underlying
* integer was {@code null}.
*
* @return native {@code int} value
*/
public int intValue() {
return getValue().intValue();
}
}
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