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Package: text_plain
text_plain
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| getContent(DataSource) |
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| getDataFlavors() |
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| text_plain() |
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| writeTo(Object, String, OutputStream) |
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Coverage
1: /*
2: * Copyright (c) 1997, 2023 Oracle and/or its affiliates. All rights reserved.
3: *
4: * This program and the accompanying materials are made available under the
5: * terms of the Eclipse Public License v. 2.0, which is available at
6: * http://www.eclipse.org/legal/epl-2.0.
7: *
8: * This Source Code may also be made available under the following Secondary
9: * Licenses when the conditions for such availability set forth in the
10: * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
11: * version 2 with the GNU Classpath Exception, which is available at
12: * https://www.gnu.org/software/classpath/license.html.
13: *
14: * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
15: */
16:
17: package org.eclipse.angus.mail.handlers;
18:
19: import jakarta.activation.ActivationDataFlavor;
20: import jakarta.activation.DataSource;
21: import jakarta.mail.internet.ContentType;
22: import jakarta.mail.internet.MimeUtility;
23:
24: import java.io.FilterOutputStream;
25: import java.io.IOException;
26: import java.io.InputStreamReader;
27: import java.io.OutputStream;
28: import java.io.OutputStreamWriter;
29: import java.io.UnsupportedEncodingException;
30:
31: /**
32: * DataContentHandler for text/plain.
33: *
34: */
35: public class text_plain extends handler_base {
36: private static ActivationDataFlavor[] myDF = {
37: new ActivationDataFlavor(String.class, "text/plain", "Text String")
38: };
39:
40: /**
41: * Creates a default {@code text_plain}.
42: */
43: public text_plain() {
44: }
45:
46: /**
47: * An OuputStream wrapper that doesn't close the underlying stream.
48: */
49: private static class NoCloseOutputStream extends FilterOutputStream {
50: NoCloseOutputStream(OutputStream os) {
51: super(os);
52: }
53:
54: @Override
55: public void close() {
56: // do nothing
57: }
58: }
59:
60: @Override
61: protected ActivationDataFlavor[] getDataFlavors() {
62: return myDF;
63: }
64:
65: @Override
66: public Object getContent(DataSource ds) throws IOException {
67: String enc = null;
68: InputStreamReader is = null;
69:
70: try {
71: enc = getCharset(ds.getContentType());
72: is = new InputStreamReader(ds.getInputStream(), enc);
73: } catch (IllegalArgumentException iex) {
74: /*
75: * An unknown charset of the form ISO-XXX-XXX will cause
76: * the JDK to throw an IllegalArgumentException. The
77: * JDK will attempt to create a classname using this string,
78: * but valid classnames must not contain the character '-',
79: * and this results in an IllegalArgumentException, rather than
80: * the expected UnsupportedEncodingException. Yikes.
81: */
82: throw new UnsupportedEncodingException(enc);
83: }
84:
85: try {
86: int pos = 0;
87: int count;
88: char buf[] = new char[1024];
89:
90:• while ((count = is.read(buf, pos, buf.length - pos)) != -1) {
91: pos += count;
92:• if (pos >= buf.length) {
93: int size = buf.length;
94:• if (size < 256*1024)
95: size += size;
96: else
97: size += 256*1024;
98: char tbuf[] = new char[size];
99: System.arraycopy(buf, 0, tbuf, 0, pos);
100: buf = tbuf;
101: }
102: }
103: return new String(buf, 0, pos);
104: } finally {
105: try {
106: is.close();
107: } catch (IOException ex) {
108: // ignore it
109: }
110: }
111: }
112:
113: /**
114: * Write the object to the output stream, using the specified MIME type.
115: */
116: @Override
117: public void writeTo(Object obj, String type, OutputStream os)
118: throws IOException {
119:• if (!(obj instanceof String))
120: throw new IOException("\"" + getDataFlavors()[0].getMimeType() +
121: "\" DataContentHandler requires String object, " +
122: "was given object of type " + obj.getClass().toString());
123:
124: String enc = null;
125: OutputStreamWriter osw = null;
126:
127: try {
128: enc = getCharset(type);
129: osw = new OutputStreamWriter(new NoCloseOutputStream(os), enc);
130: } catch (IllegalArgumentException iex) {
131: /*
132: * An unknown charset of the form ISO-XXX-XXX will cause
133: * the JDK to throw an IllegalArgumentException. The
134: * JDK will attempt to create a classname using this string,
135: * but valid classnames must not contain the character '-',
136: * and this results in an IllegalArgumentException, rather than
137: * the expected UnsupportedEncodingException. Yikes.
138: */
139: throw new UnsupportedEncodingException(enc);
140: }
141:
142: String s = (String)obj;
143: osw.write(s, 0, s.length());
144: /*
145: * Have to call osw.close() instead of osw.flush() because
146: * some charset converts, such as the iso-2022-jp converter,
147: * don't output the "shift out" sequence unless they're closed.
148: * The NoCloseOutputStream wrapper prevents the underlying
149: * stream from being closed.
150: */
151: osw.close();
152: }
153:
154: private String getCharset(String type) {
155: try {
156: ContentType ct = new ContentType(type);
157: String charset = ct.getParameter("charset");
158:• if (charset == null)
159: // If the charset parameter is absent, use US-ASCII.
160: charset = "us-ascii";
161: return MimeUtility.javaCharset(charset);
162: } catch (Exception ex) {
163: return null;
164: }
165: }
166: }