com.google.gwt.dev.resource.Resource Maven / Gradle / Ivy
/*
* Copyright 2008 Google Inc.
*
* 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.google.gwt.dev.resource;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
/**
* Provides information about a file-like resource.
*/
public abstract class Resource {
/**
* Overridden to finalize; always returns object identity.
*/
@Override
public final boolean equals(Object obj) {
return super.equals(obj);
}
/**
* Returns the last modified time of the compilation unit.
*/
public abstract long getLastModified();
/**
* Returns the URL-like location of the resource. The returned value should
* generally reflect a unique resource in the system. The returned value will
* only be a valid URL if the underlying object is accessible via a URL.
*/
public abstract String getLocation();
/**
* Returns the full abstract path of the resource.
*/
public abstract String getPath();
/**
* Returns a URL for this resource if the resource happens to be based off the
* file system, otherwise returns null.
*
* @deprecated with no replacement
*/
@Deprecated
public final URL getURL() {
try {
return new URL(getLocation());
} catch (MalformedURLException e) {
return null;
}
}
/**
* Overridden to finalize; always returns identity hash code.
*/
@Override
public final int hashCode() {
return super.hashCode();
}
/**
* Returns the contents of the resource. May return null if this
* {@link Resource} has been invalidated by its containing
* {@link ResourceOracle}. The caller is responsible for closing the stream.
*/
public abstract InputStream openContents();
/**
* Overridden to finalize; always returns {@link #getLocation()}.
*/
@Override
public final String toString() {
return getLocation();
}
public abstract boolean wasRerooted();
}