/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.drill.common.util;
import java.lang.reflect.Constructor;
public class ConstructorChecker {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(ConstructorChecker.class);
private final String requirementString;
private final Class<?>[] classes;
public ConstructorChecker(Class<?>... classes) {
super();
this.classes = classes;
StringBuffer sb = new StringBuffer();
sb.append("The required constructor is (");
for (int i =0; i < classes.length; i++) {
if (i != 0) {
sb.append(", ");
}
sb.append(classes[i].getName());
}
this.requirementString = sb.toString();
}
public boolean check(Constructor<?> c) {
Class<?>[] params = c.getParameterTypes();
if (params.length != classes.length) {
return false;
}
for (int i =0; i < classes.length; i++) {
if ( !classes[i].isAssignableFrom(params[i])) {
return false;
}
}
return true;
}
public String getRequirementString() {
return requirementString;
}
}