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/**
* Copyright 2012-2014 Julien Eluard and contributors
* This project includes software developed by Julien Eluard: https://github.com/jeluard/
*
* 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 org.osjava.jardiff;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
/**
* A specific type of DiffCriteria which is only true for classes, methods
* and fields which are not synthetic, and are public or protected.
*
* @author <a href="mailto:antony@cyberiantiger.org">Antony Riley</a>
*/
public class SimpleDiffCriteria implements DiffCriteria
{
@Override
public boolean equals(final Object arg) {
if (arg == this) {
return true;
} else if ( !(arg instanceof SimpleDiffCriteria) ) {
return false;
}
return true; // no states
}
@Override
public String toString() { return "SimpleDiffCriteria"; }
/**
* Check if a class is valid.
* If the class is not synthetic and is public or protected, return true.
*
* @param info Info describing the class.
* @return True if the class meets the criteria, false otherwise.
*/
public boolean validClass(final ClassInfo info) {
return !info.isSynthetic() && (info.isPublic() || info.isProtected());
}
/**
* Check if a method is valid.
* If the method is not synthetic and is public or protected, return true.
*
* @param info Info describing the method.
* @return True if the method meets the criteria, false otherwise.
*/
public boolean validMethod(final MethodInfo info) {
return !info.isSynthetic() && (info.isPublic() || info.isProtected());
}
/**
* Check if a field is valid.
* If the method is not synthetic and is public or protected, return true.
*
* @param info Info describing the field.
* @return True if the field meets the criteria, false otherwise.
*/
public boolean validField(final FieldInfo info) {
return !info.isSynthetic() && (info.isPublic() || info.isProtected());
}
/**
* Check if there is a change between two versions of a class.
* Returns true if the access flags differ, or if the superclass differs
* or if the implemented interfaces differ.
*
* @param oldInfo Info about the old version of the class.
* @param newInfo Info about the new version of the class.
* @return True if the classes differ, false otherwise.
*/
public boolean differs(final ClassInfo oldInfo, final ClassInfo newInfo) {
if (Tools.isClassAccessChange(oldInfo.getAccess(), newInfo.getAccess()))
return true;
// Yes classes can have a null supername, e.g. java.lang.Object !
if(oldInfo.getSupername() == null) {
if(newInfo.getSupername() != null) {
return true;
}
} else if (!oldInfo.getSupername().equals(newInfo.getSupername())) {
return true;
}
final Set<String> oldInterfaces
= new HashSet(Arrays.asList(oldInfo.getInterfaces()));
final Set<String> newInterfaces
= new HashSet(Arrays.asList(newInfo.getInterfaces()));
if (!oldInterfaces.equals(newInterfaces))
return true;
return false;
}
@Override
public boolean differs(final MethodInfo oldInfo, final MethodInfo newInfo) {
return // Tools.isDescChange(oldInfo.getDesc(), newInfo.getDesc()) ||
Tools.isMethodAccessChange(oldInfo.getAccess(), newInfo.getAccess()) ||
Tools.isThrowsClauseChange(oldInfo.getExceptions(), newInfo.getExceptions());
}
@Override
public boolean differsBinary(final MethodInfo oldInfo, final MethodInfo newInfo) {
return // Tools.isDescChange(oldInfo.getDesc(), newInfo.getDesc()) ||
Tools.isMethodAccessChange(oldInfo.getAccess(), newInfo.getAccess());
}
@Override
public boolean differs(final FieldInfo oldInfo, final FieldInfo newInfo) {
return Tools.isFieldTypeChange(oldInfo.getValue(), newInfo.getValue()) ||
Tools.isFieldAccessChange(oldInfo.getAccess(), newInfo.getAccess()) ||
Tools.isFieldValueChange(oldInfo.getValue(), newInfo.getValue());
}
@Override
public boolean differsBinary(final FieldInfo oldInfo, final FieldInfo newInfo) {
return Tools.isFieldTypeChange(oldInfo.getValue(), newInfo.getValue()) ||
Tools.isFieldAccessChange(oldInfo.getAccess(), newInfo.getAccess());
}
}
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