/*
* Copyright 2008 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.constretto.model;
import org.constretto.exception.ConstrettoException;
import java.io.InputStream;
/**
* @author <a href="mailto:kaare.nilsen@gmail.com">Kaare Nilsen</a>
*/
public abstract class Resource {
public static final String CLASSPATH_PREFIX = "classpath:";
public static final String FILE_PREFIX = "file:";
final String path;
protected Resource(String path) {
if (path == null) {
throw new ConstrettoException("Resources with a null value for the 'path' argument is not allowed. ");
}
this.path = path;
}
public static Resource create(String path) {
if (path.startsWith(CLASSPATH_PREFIX)) {
return new ClassPathResource(path);
} else if (path.startsWith(FILE_PREFIX)) {
return new FileResource(path);
} else {
return new UrlResource(path);
}
}
public abstract boolean exists();
public abstract InputStream getInputStream();
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append(getClass().getSimpleName());
sb.append("{path='").append(path).append('\'');
sb.append('}');
return sb.toString();
}
}