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/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* 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.
*/
/* $Id$ */
package org.apache.fop.apps;
// SAX
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
// Java
import java.net.URL;
import java.io.File;
/**
* Abstract super class for input handlers.
* Should be used to abstract the various possibilities on how input
* can be provided to FOP (but actually isn't).
*/
public abstract class InputHandler {
/**
* Get the input source associated with this input handler.
* @return the input source
*/
public abstract InputSource getInputSource();
/**
* Get the SAX parser associated with this input handler.
* @return the SAX parser
* @throws FOPException in case of an error determining the SAX parser
*/
public abstract XMLReader getParser() throws FOPException;
/**
* Creates an InputSource from a URL.
* @param url URL to use
* @return the newly created InputSource
*/
public static InputSource urlInputSource(URL url) {
return new InputSource(url.toString());
}
/**
* Creates an <code>InputSource</code> from a <code>File</code>
* @param file the <code>File</code>
* @return the <code>InputSource</code> created
*/
public static InputSource fileInputSource(File file) {
/* this code adapted from James Clark's in XT */
String path = file.getAbsolutePath();
String fSep = System.getProperty("file.separator");
if (fSep != null && fSep.length() == 1) {
path = path.replace(fSep.charAt(0), '/');
}
if (path.length() > 0 && path.charAt(0) != '/') {
path = '/' + path;
}
try {
return new InputSource(new URL("file", null, path).toString());
} catch (java.net.MalformedURLException e) {
throw new Error("unexpected MalformedURLException");
}
}
}
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