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| ReaderInputStream (Apache Axis2 - Transport - Root 1.0.0 API) |
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| <H2> |
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| org.apache.axis2.transport.base.streams</FONT> |
| <BR> |
| Class ReaderInputStream</H2> |
| <PRE> |
| java.lang.Object |
| <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by ">java.io.InputStream |
| <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.axis2.transport.base.streams.ReaderInputStream</B> |
| </PRE> |
| <DL> |
| <DT><B>All Implemented Interfaces:</B> <DD>java.io.Closeable</DD> |
| </DL> |
| <HR> |
| <DL> |
| <DT><PRE>public class <B>ReaderInputStream</B><DT>extends java.io.InputStream</DL> |
| </PRE> |
| |
| <P> |
| <CODE>InputStream</CODE> implementation that reads a character stream from a <CODE>Reader</CODE> |
| and transforms it to a byte stream using a specified charset encoding. The stream |
| is transformed using a <CODE>CharsetEncoder</CODE> object, guaranteeing that all charset |
| encodings supported by the JRE are handled correctly. In particular for charsets such as |
| UTF-16, the implementation ensures that one and only one byte order marker |
| is produced. |
| <p> |
| Since in general it is not possible to predict the number of characters to be read from the |
| <CODE>Reader</CODE> to satisfy a read request on the <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A>, all reads from |
| the <CODE>Reader</CODE> are buffered. There is therefore no well defined correlation |
| between the current position of the <CODE>Reader</CODE> and that of the <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A>. |
| This also implies that in general there is no need to wrap the underlying <CODE>Reader</CODE> |
| in a <CODE>BufferedReader</CODE>. |
| <p> |
| <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A> implements the inverse transformation of <CODE>InputStreamReader</CODE>; |
| in the following example, reading from <tt>in2</tt> would return the same byte |
| sequence as reading from <tt>in</tt> (provided that the initial byte sequence is legal |
| with respect to the charset encoding): |
| <pre> |
| InputStream in = ... |
| Charset cs = ... |
| InputStreamReader reader = new InputStreamReader(in, cs); |
| ReaderInputStream in2 = new ReaderInputStream(reader, cs);</pre> |
| <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A> implements the same transformation as <CODE>OutputStreamWriter</CODE>, |
| except that the control flow is reversed: both classes transform a character stream |
| into a byte stream, but <CODE>OutputStreamWriter</CODE> pushes data to the underlying stream, |
| while <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A> pulls it from the underlying stream. |
| <p> |
| Note that while there are use cases where there is no alternative to using |
| this class, very often the need to use this class is an indication of a flaw |
| in the design of the code. This class is typically used in situations where an existing |
| API only accepts an <CODE>InputStream</CODE>, but where the most natural way to produce the data |
| is as a character stream, i.e. by providing a <CODE>Reader</CODE> instance. An example of a situation |
| where this problem may appear is when implementing the <CODE>DataSource</CODE> |
| interface from the Java Activation Framework. |
| <p> |
| Given the fact that the <CODE>Reader</CODE> class doesn't provide any way to predict whether the next |
| read operation will block or not, it is not possible to provide a meaningful |
| implementation of the <CODE>InputStream.available()</CODE> method. A call to this method |
| will always return 0. Also, this class doesn't support <CODE>InputStream.mark(int)</CODE>. |
| <p> |
| Instances of <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A> are not thread safe. |
| <P> |
| |
| <P> |
| <HR> |
| |
| <P> |
| |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| |
| <A NAME="constructor_summary"><!-- --></A> |
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| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
| <B>Constructor Summary</B></FONT></TH> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD><CODE><B><A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html#ReaderInputStream(java.io.Reader)">ReaderInputStream</A></B>(java.io.Reader reader)</CODE> |
| |
| <BR> |
| Construct a new <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A> that uses the default character encoding |
| with a default input buffer size of 1024 characters.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD><CODE><B><A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html#ReaderInputStream(java.io.Reader, java.nio.charset.Charset)">ReaderInputStream</A></B>(java.io.Reader reader, |
| java.nio.charset.Charset charset)</CODE> |
| |
| <BR> |
| Construct a new <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A> with a default input buffer size of |
| 1024 characters.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD><CODE><B><A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html#ReaderInputStream(java.io.Reader, java.nio.charset.Charset, int)">ReaderInputStream</A></B>(java.io.Reader reader, |
| java.nio.charset.Charset charset, |
| int bufferSize)</CODE> |
| |
| <BR> |
| Construct a new <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A>.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD><CODE><B><A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html#ReaderInputStream(java.io.Reader, java.lang.String)">ReaderInputStream</A></B>(java.io.Reader reader, |
| java.lang.String charsetName)</CODE> |
| |
| <BR> |
| Construct a new <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A> with a default input buffer size of |
| 1024 characters.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD><CODE><B><A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html#ReaderInputStream(java.io.Reader, java.lang.String, int)">ReaderInputStream</A></B>(java.io.Reader reader, |
| java.lang.String charsetName, |
| int bufferSize)</CODE> |
| |
| <BR> |
| Construct a new <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A>.</TD> |
| </TR> |
| </TABLE> |
| |
| <!-- ========== METHOD SUMMARY =========== --> |
| |
| <A NAME="method_summary"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
| <B>Method Summary</B></FONT></TH> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> void</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html#close()">close</A></B>()</CODE> |
| |
| <BR> |
| Close the stream.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> int</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html#read()">read</A></B>()</CODE> |
| |
| <BR> |
| Read a single byte.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> int</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html#read(byte[])">read</A></B>(byte[] b)</CODE> |
| |
| <BR> |
| Read the specified number of bytes into an array.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> int</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html#read(byte[], int, int)">read</A></B>(byte[] b, |
| int off, |
| int len)</CODE> |
| |
| <BR> |
| Read the specified number of bytes into an array.</TD> |
| </TR> |
| </TABLE> |
| <A NAME="methods_inherited_from_class_java.io.InputStream"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
| <TH ALIGN="left"><B>Methods inherited from class java.io.InputStream</B></TH> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD><CODE>available, mark, markSupported, reset, skip</CODE></TD> |
| </TR> |
| </TABLE> |
| <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
| <TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD> |
| </TR> |
| </TABLE> |
| |
| <P> |
| |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| |
| <A NAME="constructor_detail"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
| <B>Constructor Detail</B></FONT></TH> |
| </TR> |
| </TABLE> |
| |
| <A NAME="ReaderInputStream(java.io.Reader, java.nio.charset.Charset, int)"><!-- --></A><H3> |
| ReaderInputStream</H3> |
| <PRE> |
| public <B>ReaderInputStream</B>(java.io.Reader reader, |
| java.nio.charset.Charset charset, |
| int bufferSize)</PRE> |
| <DL> |
| <DD>Construct a new <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A>. |
| <P> |
| <DL> |
| <DT><B>Parameters:</B><DD><CODE>reader</CODE> - the target <CODE>Reader</CODE><DD><CODE>charset</CODE> - the charset encoding<DD><CODE>bufferSize</CODE> - the size of the input buffer in number of characters</DL> |
| </DL> |
| <HR> |
| |
| <A NAME="ReaderInputStream(java.io.Reader, java.nio.charset.Charset)"><!-- --></A><H3> |
| ReaderInputStream</H3> |
| <PRE> |
| public <B>ReaderInputStream</B>(java.io.Reader reader, |
| java.nio.charset.Charset charset)</PRE> |
| <DL> |
| <DD>Construct a new <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A> with a default input buffer size of |
| 1024 characters. |
| <P> |
| <DL> |
| <DT><B>Parameters:</B><DD><CODE>reader</CODE> - the target <CODE>Reader</CODE><DD><CODE>charset</CODE> - the charset encoding</DL> |
| </DL> |
| <HR> |
| |
| <A NAME="ReaderInputStream(java.io.Reader, java.lang.String, int)"><!-- --></A><H3> |
| ReaderInputStream</H3> |
| <PRE> |
| public <B>ReaderInputStream</B>(java.io.Reader reader, |
| java.lang.String charsetName, |
| int bufferSize)</PRE> |
| <DL> |
| <DD>Construct a new <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A>. |
| <P> |
| <DL> |
| <DT><B>Parameters:</B><DD><CODE>reader</CODE> - the target <CODE>Reader</CODE><DD><CODE>charsetName</CODE> - the name of the charset encoding<DD><CODE>bufferSize</CODE> - the size of the input buffer in number of characters</DL> |
| </DL> |
| <HR> |
| |
| <A NAME="ReaderInputStream(java.io.Reader, java.lang.String)"><!-- --></A><H3> |
| ReaderInputStream</H3> |
| <PRE> |
| public <B>ReaderInputStream</B>(java.io.Reader reader, |
| java.lang.String charsetName)</PRE> |
| <DL> |
| <DD>Construct a new <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A> with a default input buffer size of |
| 1024 characters. |
| <P> |
| <DL> |
| <DT><B>Parameters:</B><DD><CODE>reader</CODE> - the target <CODE>Reader</CODE><DD><CODE>charsetName</CODE> - the name of the charset encoding</DL> |
| </DL> |
| <HR> |
| |
| <A NAME="ReaderInputStream(java.io.Reader)"><!-- --></A><H3> |
| ReaderInputStream</H3> |
| <PRE> |
| public <B>ReaderInputStream</B>(java.io.Reader reader)</PRE> |
| <DL> |
| <DD>Construct a new <A HREF="../../../../../../org/apache/axis2/transport/base/streams/ReaderInputStream.html" title="class in org.apache.axis2.transport.base.streams"><CODE>ReaderInputStream</CODE></A> that uses the default character encoding |
| with a default input buffer size of 1024 characters. |
| <P> |
| <DL> |
| <DT><B>Parameters:</B><DD><CODE>reader</CODE> - the target <CODE>Reader</CODE></DL> |
| </DL> |
| |
| <!-- ============ METHOD DETAIL ========== --> |
| |
| <A NAME="method_detail"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
| <B>Method Detail</B></FONT></TH> |
| </TR> |
| </TABLE> |
| |
| <A NAME="read(byte[], int, int)"><!-- --></A><H3> |
| read</H3> |
| <PRE> |
| public int <B>read</B>(byte[] b, |
| int off, |
| int len) |
| throws java.io.IOException</PRE> |
| <DL> |
| <DD>Read the specified number of bytes into an array. |
| <P> |
| <DD><DL> |
| <DT><B>Overrides:</B><DD><CODE>read</CODE> in class <CODE>java.io.InputStream</CODE></DL> |
| </DD> |
| <DD><DL> |
| <DT><B>Parameters:</B><DD><CODE>b</CODE> - the byte array to read into<DD><CODE>off</CODE> - the offset to start reading bytes into<DD><CODE>len</CODE> - the number of bytes to read |
| <DT><B>Returns:</B><DD>the number of bytes read or <code>-1</code> |
| if the end of the stream has been reached |
| <DT><B>Throws:</B> |
| <DD><CODE>java.io.IOException</CODE></DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="read(byte[])"><!-- --></A><H3> |
| read</H3> |
| <PRE> |
| public int <B>read</B>(byte[] b) |
| throws java.io.IOException</PRE> |
| <DL> |
| <DD>Read the specified number of bytes into an array. |
| <P> |
| <DD><DL> |
| <DT><B>Overrides:</B><DD><CODE>read</CODE> in class <CODE>java.io.InputStream</CODE></DL> |
| </DD> |
| <DD><DL> |
| <DT><B>Parameters:</B><DD><CODE>b</CODE> - the byte array to read into |
| <DT><B>Returns:</B><DD>the number of bytes read or <code>-1</code> |
| if the end of the stream has been reached |
| <DT><B>Throws:</B> |
| <DD><CODE>java.io.IOException</CODE></DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="read()"><!-- --></A><H3> |
| read</H3> |
| <PRE> |
| public int <B>read</B>() |
| throws java.io.IOException</PRE> |
| <DL> |
| <DD>Read a single byte. |
| <P> |
| <DD><DL> |
| <DT><B>Specified by:</B><DD><CODE>read</CODE> in class <CODE>java.io.InputStream</CODE></DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Returns:</B><DD>either the byte read or <code>-1</code> if the end of the stream |
| has been reached |
| <DT><B>Throws:</B> |
| <DD><CODE>java.io.IOException</CODE></DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="close()"><!-- --></A><H3> |
| close</H3> |
| <PRE> |
| public void <B>close</B>() |
| throws java.io.IOException</PRE> |
| <DL> |
| <DD>Close the stream. This method will cause the underlying <CODE>Reader</CODE> |
| to be closed. |
| <P> |
| <DD><DL> |
| <DT><B>Specified by:</B><DD><CODE>close</CODE> in interface <CODE>java.io.Closeable</CODE><DT><B>Overrides:</B><DD><CODE>close</CODE> in class <CODE>java.io.InputStream</CODE></DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Throws:</B> |
| <DD><CODE>java.io.IOException</CODE></DL> |
| </DD> |
| </DL> |
| <!-- ========= END OF CLASS DATA ========= --> |
| <HR> |
| |
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| <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> |
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