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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
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* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
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*/
package com.sun.mail.handlers;
import java.io.*;
import java.awt.datatransfer.DataFlavor;
import javax.activation.*;
import javax.mail.internet.*;
/**
* DataContentHandler for text/plain.
*
*/
public class text_plain implements DataContentHandler {
private static ActivationDataFlavor myDF = new ActivationDataFlavor(
java.lang.String.class,
"text/plain",
"Text String");
/**
* An OuputStream wrapper that doesn't close the underlying stream.
*/
private static class NoCloseOutputStream extends FilterOutputStream {
public NoCloseOutputStream(OutputStream os) {
super(os);
}
public void close() {
// do nothing
}
}
protected ActivationDataFlavor getDF() {
return myDF;
}
/**
* Return the DataFlavors for this DataContentHandler.
*
* @return The DataFlavors
*/
public DataFlavor[] getTransferDataFlavors() {
return new DataFlavor[] { getDF() };
}
/**
* Return the Transfer Data of type DataFlavor from InputStream.
*
* @param df The DataFlavor
* @param ds The DataSource corresponding to the data
* @return String object
*/
public Object getTransferData(DataFlavor df, DataSource ds)
throws IOException {
// use myDF.equals to be sure to get ActivationDataFlavor.equals,
// which properly ignores Content-Type parameters in comparison
if (getDF().equals(df))
return getContent(ds);
else
return null;
}
public Object getContent(DataSource ds) throws IOException {
String enc = null;
InputStreamReader is = null;
try {
enc = getCharset(ds.getContentType());
is = new InputStreamReader(ds.getInputStream(), enc);
} catch (IllegalArgumentException iex) {
/*
* An unknown charset of the form ISO-XXX-XXX will cause
* the JDK to throw an IllegalArgumentException. The
* JDK will attempt to create a classname using this string,
* but valid classnames must not contain the character '-',
* and this results in an IllegalArgumentException, rather than
* the expected UnsupportedEncodingException. Yikes.
*/
throw new UnsupportedEncodingException(enc);
}
try {
int pos = 0;
int count;
char buf[] = new char[1024];
while ((count = is.read(buf, pos, buf.length - pos)) != -1) {
pos += count;
if (pos >= buf.length) {
int size = buf.length;
if (size < 256*1024)
size += size;
else
size += 256*1024;
char tbuf[] = new char[size];
System.arraycopy(buf, 0, tbuf, 0, pos);
buf = tbuf;
}
}
return new String(buf, 0, pos);
} finally {
try {
is.close();
} catch (IOException ex) {
// ignore it
}
}
}
/**
* Write the object to the output stream, using the specified MIME type.
*/
public void writeTo(Object obj, String type, OutputStream os)
throws IOException {
if (!(obj instanceof String))
throw new IOException("\"" + getDF().getMimeType() +
"\" DataContentHandler requires String object, " +
"was given object of type " + obj.getClass().toString());
String enc = null;
OutputStreamWriter osw = null;
try {
enc = getCharset(type);
osw = new OutputStreamWriter(new NoCloseOutputStream(os), enc);
} catch (IllegalArgumentException iex) {
/*
* An unknown charset of the form ISO-XXX-XXX will cause
* the JDK to throw an IllegalArgumentException. The
* JDK will attempt to create a classname using this string,
* but valid classnames must not contain the character '-',
* and this results in an IllegalArgumentException, rather than
* the expected UnsupportedEncodingException. Yikes.
*/
throw new UnsupportedEncodingException(enc);
}
String s = (String)obj;
osw.write(s, 0, s.length());
/*
* Have to call osw.close() instead of osw.flush() because
* some charset converts, such as the iso-2022-jp converter,
* don't output the "shift out" sequence unless they're closed.
* The NoCloseOutputStream wrapper prevents the underlying
* stream from being closed.
*/
osw.close();
}
private String getCharset(String type) {
try {
ContentType ct = new ContentType(type);
String charset = ct.getParameter("charset");
if (charset == null)
// If the charset parameter is absent, use US-ASCII.
charset = "us-ascii";
return MimeUtility.javaCharset(charset);
} catch (Exception ex) {
return null;
}
}
}
