/*
* Copyright [2008] [Anay Nayak]
*
* 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.googlecode.equalsnhashcode.finders;
import com.intellij.psi.PsiClass;
import com.intellij.psi.PsiMethod;
import com.intellij.psi.PsiParameter;
public class EqualsMethodFinder {
private PsiClass psiClass;
private static final String EQUALS = "equals";
public EqualsMethodFinder(PsiClass psiClass) {
this.psiClass = psiClass;
}
public PsiMethod find() {
PsiMethod[] psiMethods = psiClass.findMethodsByName(EQUALS, false);
PsiMethod result = null;
for (PsiMethod psiMethod : psiMethods) {
if (psiMethod.getName().equals(EQUALS) && hasOneParameter(psiMethod) && parameterIsOfType(Object.class, psiMethod)) {
return psiMethod;
}
}
return result;
}
private boolean parameterIsOfType(Class objectClass, PsiMethod psiMethod) {
return objectClass.getCanonicalName().equals(firstParameter(psiMethod).getTypeElement().getType().getCanonicalText());
}
private PsiParameter firstParameter(PsiMethod psiMethod) {
return psiMethod.getParameterList().getParameters()[0];
}
private boolean hasOneParameter(PsiMethod psiMethod) {
return psiMethod.getParameterList().getParametersCount() == 1;
}
}