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/***
*
* Copyright (c) 2007 Paul Hammant
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.thoughtworks.paranamer;
import java.lang.reflect.AccessibleObject;
/**
* Implementation of Paranamer which chooses between a series of Paranamer instances depending on which can supply data.
* It prioritizes the paranamer instances according to the order they were passed in.
*
* @author Paul Hammant
* @author Mauro Talevi
*/
public class AdaptiveParanamer implements Paranamer {
public static final String __PARANAMER_DATA = "v1.0 \n"
+ "com.thoughtworks.paranamer.AdaptiveParanamer AdaptiveParanamer com.thoughtworks.paranamer.Paranamer,com.thoughtworks.paranamer.Paranamer delegate,fallback\n"
+ "com.thoughtworks.paranamer.AdaptiveParanamer AdaptiveParanamer com.thoughtworks.paranamer.Paranamer,com.thoughtworks.paranamer.Paranamer,com.thoughtworks.paranamer.Paranamer delegate,fallback,reserve\n"
+ "com.thoughtworks.paranamer.AdaptiveParanamer AdaptiveParanamer com.thoughtworks.paranamer.Paranamer[] paranamers\n"
+ "com.thoughtworks.paranamer.AdaptiveParanamer lookupParameterNames java.lang.AccessibleObject methodOrConstructor \n"
+ "com.thoughtworks.paranamer.AdaptiveParanamer lookupParameterNames java.lang.AccessibleObject,boolean methodOrCtor,throwExceptionIfMissing \n";
private final Paranamer[] paranamers;
/**
* Use DefaultParanamer ahead of BytecodeReadingParanamer
*/
public AdaptiveParanamer() {
this(new DefaultParanamer(), new BytecodeReadingParanamer());
}
/**
* Prioritize a series of Paranamers
* @param paranamers the paranamers in question
*/
public AdaptiveParanamer(Paranamer... paranamers) {
this.paranamers = paranamers;
}
public String[] lookupParameterNames(AccessibleObject methodOrConstructor) {
return lookupParameterNames(methodOrConstructor, true);
}
public String[] lookupParameterNames(AccessibleObject methodOrCtor, boolean throwExceptionIfMissing) {
for (int i = 0; i < paranamers.length; i++) {
Paranamer paranamer = paranamers[i];
String[] names = paranamer.lookupParameterNames(methodOrCtor, i+1 < paranamers.length ? false : throwExceptionIfMissing);
if (names != Paranamer.EMPTY_NAMES) {
return names;
}
}
return Paranamer.EMPTY_NAMES;
}
}
