/*
* Copyright 2002-2016 the original author or authors.
*
* 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.springframework.web.reactive.result.condition;
import java.util.Collection;
import java.util.Iterator;
/**
* A base class for {@link RequestCondition} types providing implementations of
* {@link #equals(Object)}, {@link #hashCode()}, and {@link #toString()}.
*
* @author Rossen Stoyanchev
* @since 5.0
*/
public abstract class AbstractRequestCondition<T extends AbstractRequestCondition<T>>
implements RequestCondition<T> {
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj != null && getClass() == obj.getClass()) {
AbstractRequestCondition<?> other = (AbstractRequestCondition<?>) obj;
return getContent().equals(other.getContent());
}
return false;
}
@Override
public int hashCode() {
return getContent().hashCode();
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder("[");
for (Iterator<?> iterator = getContent().iterator(); iterator.hasNext();) {
Object expression = iterator.next();
builder.append(expression.toString());
if (iterator.hasNext()) {
builder.append(getToStringInfix());
}
}
builder.append("]");
return builder.toString();
}
/**
* Indicates whether this condition is empty, i.e. whether or not it
* contains any discrete items.
* @return {@code true} if empty; {@code false} otherwise
*/
public boolean isEmpty() {
return getContent().isEmpty();
}
/**
* Return the discrete items a request condition is composed of.
* <p>For example URL patterns, HTTP request methods, param expressions, etc.
* @return a collection of objects, never {@code null}
*/
protected abstract Collection<?> getContent();
/**
* The notation to use when printing discrete items of content.
* <p>For example {@code " || "} for URL patterns or {@code " && "}
* for param expressions.
*/
protected abstract String getToStringInfix();
}