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38977
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alessia.ba
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package eu.dnetlib.data.collector.plugins.datasources;
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import java.io.InputStream;
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import java.util.Iterator;
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39005
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claudio.at
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import java.util.NoSuchElementException;
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38977
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alessia.ba
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import javax.xml.stream.XMLInputFactory;
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import javax.xml.stream.XMLStreamConstants;
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import javax.xml.stream.XMLStreamException;
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import javax.xml.stream.XMLStreamReader;
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49643
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alessia.ba
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import eu.dnetlib.data.collector.plugins.HttpConnector;
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49638
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alessia.ba
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import eu.dnetlib.data.collector.rmi.CollectorServiceException;
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import eu.dnetlib.data.collector.rmi.CollectorServiceRuntimeException;
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38977
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alessia.ba
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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public class Re3DataRepositoriesIterator implements Iterator<String>, Iterable<String> {
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private static final Log log = LogFactory.getLog(Re3DataRepositoriesIterator.class); // NOPMD by marko on 11/24/08 5:02 PM
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private String baseURL;
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private XMLStreamReader reader;
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38995
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alessia.ba
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private int countedRepos = 0;
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39005
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claudio.at
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private String currentRepoPath = null;
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38977
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alessia.ba
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49638
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alessia.ba
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private HttpConnector httpConnector;
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alessia.ba
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@Override
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public boolean hasNext() {
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39005
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claudio.at
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return currentRepoPath != null;
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38977
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alessia.ba
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}
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@Override
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public String next() {
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39005
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claudio.at
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if (currentRepoPath == null) throw new NoSuchElementException();
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38977
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alessia.ba
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try {
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39005
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claudio.at
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String repoInfo = getRepositoryInfo(currentRepoPath);
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38985
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alessia.ba
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return repoInfo;
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39005
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claudio.at
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} finally {
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currentRepoPath = moveToNextRepo();
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38977
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alessia.ba
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}
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}
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@Override
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public void remove() {
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throw new UnsupportedOperationException();
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}
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@Override
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public Iterator<String> iterator() {
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return this;
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}
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49638
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alessia.ba
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public Re3DataRepositoriesIterator(final InputStream xmlInputStream, final String baseUrl, final HttpConnector httpConnector) throws CollectorServiceException {
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this.httpConnector = httpConnector;
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38977
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alessia.ba
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XMLInputFactory factory = XMLInputFactory.newInstance();
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39005
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claudio.at
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try {
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reader = factory.createXMLStreamReader(xmlInputStream);
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} catch (XMLStreamException e) {
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throw new CollectorServiceException(e);
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}
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38977
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alessia.ba
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baseURL = baseUrl;
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39005
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claudio.at
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// try to fetch the 1st
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currentRepoPath = moveToNextRepo();
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38977
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alessia.ba
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}
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private String getNextRepositoryPath() {
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return reader.getAttributeValue(null, "href");
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}
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39005
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claudio.at
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private String moveToNextRepo() {
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try {
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while (reader.hasNext()) {
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int event = reader.next();
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if (event == XMLStreamConstants.START_ELEMENT) {
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String elementName = reader.getLocalName();
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if (elementName.equals("link")) {
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String repoPath = getNextRepositoryPath();
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log.debug(String.format("Found %s repositories. The last has link %s", ++countedRepos, repoPath));
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return repoPath;
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}
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38996
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alessia.ba
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}
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38977
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alessia.ba
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}
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39005
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claudio.at
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log.info("Seems there are no more repository to iterate on. Total: " + countedRepos);
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return null;
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} catch (XMLStreamException e) {
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throw new CollectorServiceRuntimeException(e);
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38977
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alessia.ba
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}
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}
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39005
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claudio.at
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private String getRepositoryInfo(final String repositoryPath) throws CollectorServiceRuntimeException {
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43991
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alessia.ba
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String targetURL = repositoryPath;
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if(!repositoryPath.startsWith(baseURL))
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targetURL = baseURL + repositoryPath;
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38985
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alessia.ba
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try {
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49638
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alessia.ba
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return getHttpConnector().getInputSource(targetURL);
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} catch (CollectorServiceException e) {
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39005
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claudio.at
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throw new CollectorServiceRuntimeException("OOOPS something bad happen getting repo info from " + targetURL, e);
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38977
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alessia.ba
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}
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}
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public String getBaseURL() {
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return baseURL;
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}
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public void setBaseURL(final String baseURL) {
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this.baseURL = baseURL;
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}
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38995
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alessia.ba
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public int getCountedRepos() {
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return countedRepos;
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}
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public void setCountedRepos(final int countedRepos) {
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this.countedRepos = countedRepos;
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}
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49638
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alessia.ba
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public XMLStreamReader getReader() {
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return reader;
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}
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public void setReader(final XMLStreamReader reader) {
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this.reader = reader;
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}
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public String getCurrentRepoPath() {
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return currentRepoPath;
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}
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public void setCurrentRepoPath(final String currentRepoPath) {
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this.currentRepoPath = currentRepoPath;
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}
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public HttpConnector getHttpConnector() {
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return httpConnector;
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}
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public void setHttpConnector(final HttpConnector httpConnector) {
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this.httpConnector = httpConnector;
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}
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38977
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alessia.ba
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}
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