ORG.oclc.oai.server.verb.ListMetadataFormats Maven / Gradle / Ivy
/**
* Copyright 2006 OCLC Online Computer Library Center Licensed under the Apache
* License, Version 2.0 (the "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 KIND, either express
* or implied. See the License for the specific language governing permissions and
* limitations under the License.
*/
package ORG.oclc.oai.server.verb;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.Vector;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpUtils;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import ORG.oclc.oai.server.catalog.AbstractCatalog;
import ORG.oclc.oai.server.crosswalk.Crosswalk;
import ORG.oclc.oai.server.crosswalk.CrosswalkItem;
import ORG.oclc.oai.server.crosswalk.Crosswalks;
/**
* This class represents a ListMetadataFormats verb on either
* the client or on the server.
*
* @author Jeffrey A. Young, OCLC Online Computer Library Center
*/
public class ListMetadataFormats extends ServerVerb {
private static ArrayList validParamNames = new ArrayList();
static {
validParamNames.add("verb");
validParamNames.add("identifier");
}
private static ArrayList requiredParamNames = new ArrayList();
static {
requiredParamNames.add("verb");
}
/**
* Server-side construction of the xml response
*
* @param context the servlet context
* @param request the servlet request
* @exception OAIBadRequestException an http 400 status code problem
* @exception OAINotFoundException an http 404 status code problem
* @exception OAIInternalServerError an http 500 status code problem
*/
public static String construct(HashMap context,
HttpServletRequest request,
HttpServletResponse response,
Transformer serverTransformer)
throws OAIInternalServerError, TransformerException {
Properties properties = (Properties)context.get("OAIHandler.properties");
AbstractCatalog abstractCatalog =
(AbstractCatalog)context.get("OAIHandler.catalog");
String baseURL = properties.getProperty("OAIHandler.baseURL");
if (baseURL == null) {
try {
baseURL = request.getRequestURL().toString();
} catch (java.lang.NoSuchMethodError f) {
baseURL = HttpUtils.getRequestURL(request).toString();
}
}
StringBuffer sb = new StringBuffer();
String identifier = request.getParameter("identifier");
sb.append("");
String styleSheet = properties.getProperty("OAIHandler.styleSheet");
if (styleSheet != null) {
sb.append("");
}
sb.append("");
sb.append("");
sb.append(createResponseDate(new Date()));
sb.append(" ");
// sb.append("");
// sb.append(getRequestURL(request));
// sb.append(" ");
sb.append(getRequestElement(request, validParamNames, baseURL));
if (hasBadArguments(request, requiredParamNames.iterator(),
validParamNames)) {
sb.append(new BadArgumentException().getMessage());
} else {
Crosswalks crosswalks = abstractCatalog.getCrosswalks();
if (identifier == null || identifier.length() == 0) {
Iterator iterator = crosswalks.iterator();
sb.append("");
while (iterator.hasNext()) {
Map.Entry entry = (Map.Entry)iterator.next();
String oaiSchemaLabel = (String)entry.getKey();
CrosswalkItem crosswalkItem = (CrosswalkItem)entry.getValue();
Crosswalk crosswalk = crosswalkItem.getCrosswalk();
// StringTokenizer tokenizer = new StringTokenizer(crosswalk.getSchemaLocation());
// String namespaceURI = tokenizer.nextToken();
// String schemaURL = tokenizer.nextToken();
String[] tokenizer = split(crosswalk.getSchemaLocation());
String namespaceURI = null;
String schemaURL = null;
if (tokenizer.length == 1) {
schemaURL = tokenizer[0];
} else if (tokenizer.length > 1) {
namespaceURI = tokenizer[0];
schemaURL = tokenizer[1];
}
sb.append("");
sb.append("");
sb.append(oaiSchemaLabel);
sb.append(" ");
sb.append("");
sb.append(schemaURL);
sb.append(" ");
sb.append("");
if (namespaceURI != null) {
sb.append(namespaceURI);
}
sb.append(" ");
sb.append(" ");
}
sb.append(" ");
} else {
try {
Vector schemaLocations = abstractCatalog.getSchemaLocations(identifier);
sb.append("");
for (int i=0; i 1) {
namespaceURI = tokenizer[0];
schemaURL = tokenizer[1];
}
sb.append("");
sb.append("");
// make sure it's a space that separates them
sb.append(crosswalks.getMetadataPrefix(namespaceURI, schemaURL));
sb.append(" ");
sb.append("");
sb.append(schemaURL);
sb.append(" ");
sb.append("");
if (namespaceURI != null) {
sb.append(namespaceURI);
}
sb.append(" ");
sb.append(" ");
}
sb.append(" ");
} catch (IdDoesNotExistException e) {
sb.append(e.getMessage());
} catch (NoMetadataFormatsException e) {
sb.append(e.getMessage());
}
}
}
sb.append(" ");
return render(response, "text/xml; charset=UTF-8", sb.toString(), serverTransformer);
}
private static String[] split(String s) {
StringTokenizer tokenizer = new StringTokenizer(s);
String[] tokens = new String[tokenizer.countTokens()];
for (int i=0; i© 2015 - 2025 Weber Informatics LLC | Privacy Policy