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Artifact with commonly used I/O functionality and for connection related
issues such as receiving or transmitting data in a unified way.
// /////////////////////////////////////////////////////////////////////////////
// REFCODES.ORG
// /////////////////////////////////////////////////////////////////////////////
// This code is copyright (c) by Siegfried Steiner, Munich, Germany, distributed
// on an "AS IS" BASIS WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, and licen-
// sed under the following (see "http://en.wikipedia.org/wiki/Multi-licensing")
// licenses:
// -----------------------------------------------------------------------------
// GNU General Public License, v3.0 ("http://www.gnu.org/licenses/gpl-3.0.html")
// -----------------------------------------------------------------------------
// Apache License, v2.0 ("http://www.apache.org/licenses/TEXT-2.0")
// -----------------------------------------------------------------------------
// Please contact the copyright holding author(s) of the software artifacts in
// question for licensing issues not being covered by the above listed licenses,
// also regarding commercial licensing models or regarding the compatibility
// with other open source licenses.
// /////////////////////////////////////////////////////////////////////////////
package org.refcodes.io;
import java.io.IOException;
import java.io.InputStream;
import java.util.Scanner;
import org.refcodes.data.Encoding;
import org.refcodes.exception.RuntimeIOException;
import org.refcodes.mixin.EncodingAccessor.EncodingBuilder;
import org.refcodes.mixin.EncodingAccessor.EncodingProperty;
import org.refcodes.mixin.InputStreamAccessor.InputStreamBuilder;
import org.refcodes.mixin.InputStreamAccessor.InputStreamProperty;
/**
* The {@link InputStreamStringBuilder} constructs {@link String} instances from
* {@link InputStream} instances. Either use
* {@link #setInputStream(InputStream)} ({@link #withInputStream(InputStream)})
* followed by a {@link Object#toString()} method (not thread safe) or directly
* call {@link #toString(InputStream)} (thread safe). You may specify an
* encoding to be used such as UTF-8 by either setting the encoding attribute
* with {@link #setEncoding(Object)} ({@link #withEncoding(String)}) or by
* passing the encoding to the conversion method as of {@link #toString(String)}
* which overrules the encoding attribute.
*/
public class InputStreamStringBuilder implements InputStreamProperty, InputStreamBuilder, EncodingProperty, EncodingBuilder {
// /////////////////////////////////////////////////////////////////////////
// VARIABLES:
// /////////////////////////////////////////////////////////////////////////
private InputStream _inputStream = null;
private String _lines = null;
private String _encoding = Encoding.UTF_8.getCode();
// /////////////////////////////////////////////////////////////////////////
// METHODS:
// /////////////////////////////////////////////////////////////////////////
/**
* {@inheritDoc}
*/
@Override
public InputStreamStringBuilder withEncoding( String aEncoding ) {
setEncoding( aEncoding );
return this;
}
/**
* {@inheritDoc}
*/
@Override
public InputStreamStringBuilder withInputStream( InputStream aInputStream ) {
setInputStream( aInputStream );
return this;
}
/**
* The {@link String} being build by the builder upon the settings of the
* attributes.
*
* @param aInputStream The {@link InputStream} which to convert into a
* {@link String}.
*
* @return The according resulting {@link String}
*
* @throws IOException thrown in case accessing the {@link InputStream}
* caused faults.
*/
public String toString( InputStream aInputStream ) throws IOException {
return toString( aInputStream, getEncoding() );
}
/**
* The {@link String}s being build by the builder upon the settings of the
* attributes.
*
* @param aInputStream The {@link InputStream} which to convert into a
* {@link String} array.
*
* @return The according resulting {@link String} array
*
* @throws IOException thrown in case accessing the {@link InputStream}
* caused faults.
*/
public String[] toStrings( InputStream aInputStream ) throws IOException {
return toString( aInputStream, getEncoding() ).split( "\\r\\n|\\n|\\r" );
}
/**
* {@inheritDoc}
*/
@Override
public String getEncoding() {
return _encoding;
}
/**
* {@inheritDoc}
*/
@Override
public void setEncoding( String aEncoding ) {
_encoding = aEncoding;
}
/**
* {@inheritDoc}
*/
@Override
public InputStream getInputStream() {
return _inputStream;
}
/**
* {@inheritDoc}
*/
@Override
public void setInputStream( InputStream aInputStream ) {
_inputStream = aInputStream;
_lines = null;
}
/**
* The {@link String} being build by the builder upon the settings of the
* attributes.
*
* @param aInputStream The {@link InputStream} which to convert into a
* {@link String}.
* @param aEncoding The text encoding to be used.
*
* @return The according resulting {@link String}
*
* @throws IOException thrown in case accessing the {@link InputStream}
* caused faults.
*/
public String toString( InputStream aInputStream, String aEncoding ) throws IOException {
if ( aInputStream == null ) {
return null;
}
try ( Scanner theScanner = new Scanner( aInputStream, aEncoding ) ) {
theScanner.useDelimiter( "\\A" );
return theScanner.hasNext() ? theScanner.next() : "";
}
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
try {
return toString( _encoding );
}
catch ( IOException e ) {
throw new RuntimeIOException( e );
}
}
/**
* The {@link String}s being build by the builder upon the settings of the
* attributes.
*
* @param aEncoding The text encoding to be used.
*
* @return The according resulting {@link String} array
*
* @throws IOException thrown in case accessing the {@link InputStream}
* caused faults.
*/
public String toString( String aEncoding ) throws IOException {
if ( _lines == null ) {
_lines = toString( _inputStream, aEncoding );
}
return _lines;
}
/**
* The {@link String}s being build by the builder upon the settings of the
* attributes.
*
* @return The according resulting {@link String} array
*
* @throws IOException thrown in case accessing the {@link InputStream}
* caused faults.
*/
public String[] toStrings() throws IOException {
return toStrings( getEncoding() );
}
/**
* The {@link String}s being build by the builder upon the settings of the
* attributes.
*
* @param aEncoding The text encoding to be used.
*
* @return The according resulting {@link String} array
*
* @throws IOException thrown in case accessing the {@link InputStream}
* caused faults.
*/
public String[] toStrings( String aEncoding ) throws IOException {
return toString( aEncoding ).split( "\\r\\n|\\n|\\r" );
}
/**
* The {@link String}s being build by the builder upon the settings of the
* attributes.
*
* @param aInputStream The {@link InputStream} which to convert into a
* {@link String} array.
* @param aEncoding The text encoding to be used.
*
* @return The according resulting {@link String} array
*
* @throws IOException thrown in case accessing the {@link InputStream}
* caused faults.
*/
public String[] toStrings( InputStream aInputStream, String aEncoding ) throws IOException {
return toString( aInputStream, aEncoding ).split( "\\r\\n|\\n|\\r" );
}
}