org.mycore.common.content.MCRStreamContent Maven / Gradle / Ivy
/*
* This file is part of *** M y C o R e ***
* See http://www.mycore.de/ for details.
*
* MyCoRe is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* MyCoRe is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MyCoRe. If not, see .
*/
package org.mycore.common.content;
import java.io.IOException;
import java.io.InputStream;
import org.mycore.datamodel.ifs.MCRContentInputStream;
/**
* Reads MCRContent from an input stream. Typically, this content is not reusable, so that
* content can only be read once. Please be aware that an instance of this object contains an
* open input stream. Thus one has to invoke {@link MCRStreamContent#getInputStream()}.close() when
* finished with this object.
*
* @author Frank L\u00FCtzenkichen
*/
public class MCRStreamContent extends MCRContent {
private InputStream in;
public MCRStreamContent(InputStream in) {
if (in == null) {
throw new NullPointerException("Cannot instantiate MCRStreamContent without InputStream.");
}
this.in = in;
}
/**
* @param systemId the systemID of this stream
*/
public MCRStreamContent(InputStream in, String systemId) {
this(in);
setSystemId(systemId);
}
/**
* @param systemId the systemID of this stream
*/
public MCRStreamContent(InputStream in, String systemId, String docType) {
this(in, systemId);
super.docType = docType;
}
@Override
public InputStream getInputStream() {
return in;
}
@Override
public MCRContentInputStream getContentInputStream() throws IOException {
if (!(in instanceof MCRContentInputStream)) {
in = super.getContentInputStream();
}
return (MCRContentInputStream) in;
}
/**
* Returns false, because input streams can only be read once.
* Use getReusableCopy() to circumvent this.
*/
@Override
public boolean isReusable() {
return false;
}
}