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Open source Reference Implementation of JSR-67: SOAP with Attachments API for Java (SAAJ MR: 1.4)
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/*
* Copyright (c) 1997, 2022 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package com.sun.xml.messaging.saaj.soap;
import java.io.*;
import jakarta.activation.*;
import com.sun.xml.messaging.saaj.packaging.mime.internet.MimeUtility;
import com.sun.xml.messaging.saaj.packaging.mime.internet.ContentType;
/**
* JAF data content handler for text/plain --> String
*/
public class StringDataContentHandler implements DataContentHandler {
private static ActivationDataFlavor myDF = new ActivationDataFlavor(
java.lang.String.class,
"text/plain",
"Text String");
public StringDataContentHandler() {}
protected ActivationDataFlavor getDF() {
return myDF;
}
/**
* Return the DataFlavors for this DataContentHandler
.
*
* @return The DataFlavors
*/
@Override
public ActivationDataFlavor[] getTransferDataFlavors() {
return new ActivationDataFlavor[]{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
*/
@Override
public Object getTransferData(ActivationDataFlavor 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;
}
@Override
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;
size += Math.min(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) {
}
}
}
/**
* Write the object to the output stream, using the specified MIME type.
*/
@Override
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(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());
osw.flush();
}
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;
}
}
}