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* Licensed to the Apache Software Foundation (ASF) under one * | |
* or more contributor license agreements. See the NOTICE file * | |
* distributed with this work for additional information * | |
* regarding copyright ownership. The ASF licenses this file * | |
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* "License"); you may not use this file except in compliance * | |
* with the License. You may obtain a copy of the License at * | |
* * | |
* http://www.apache.org/licenses/LICENSE-2.0 * | |
* * | |
* Unless required by applicable law or agreed to in writing, * | |
* software distributed under the License is distributed on an * | |
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * | |
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* specific language governing permissions and limitations * | |
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****************************************************************/ | |
package org.apache.james.mime4j.io; | |
import org.apache.james.mime4j.util.ByteArrayBuffer; | |
import java.io.IOException; | |
import java.io.InputStream; | |
/** | |
* <code>InputStream</code> used by the MIME parser to detect whether the | |
* underlying data stream was used (read from) and whether the end of the | |
* stream was reached. | |
* | |
* @version $Id$ | |
*/ | |
public class LineReaderInputStreamAdaptor extends LineReaderInputStream { | |
private final LineReaderInputStream bis; | |
private boolean used = false; | |
private boolean eof = false; | |
public LineReaderInputStreamAdaptor(final InputStream is) { | |
super(is); | |
if (is instanceof LineReaderInputStream) { | |
this.bis = (LineReaderInputStream) is; | |
} else { | |
this.bis = null; | |
} | |
} | |
public int read() throws IOException { | |
int i = in.read(); | |
this.eof = i == -1; | |
this.used = true; | |
return i; | |
} | |
public int read(byte[] b, int off, int len) throws IOException { | |
int i = in.read(b, off, len); | |
this.eof = i == -1; | |
this.used = true; | |
return i; | |
} | |
public int readLine(final ByteArrayBuffer dst) throws IOException { | |
int i; | |
if (this.bis != null) { | |
i = this.bis.readLine(dst); | |
} else { | |
i = doReadLine(dst); | |
} | |
this.eof = i == -1; | |
this.used = true; | |
return i; | |
} | |
private int doReadLine(final ByteArrayBuffer dst) throws IOException { | |
int total = 0; | |
int ch; | |
while ((ch = in.read()) != -1) { | |
dst.append(ch); | |
total++; | |
if (ch == '\n') { | |
break; | |
} | |
} | |
if (total == 0 && ch == -1) { | |
return -1; | |
} else { | |
return total; | |
} | |
} | |
public boolean eof() { | |
return this.eof; | |
} | |
public boolean isUsed() { | |
return this.used; | |
} | |
public String toString() { | |
return "[LineReaderInputStreamAdaptor: " + bis + "]"; | |
} | |
} |