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/**
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* Copyright 2006 OCLC Online Computer Library Center Licensed under the Apache
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* License, Version 2.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or
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* agreed to in writing, software distributed under the License is distributed on
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* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package edu.ucsb.nceas.metacat.oaipmh.provider.server.crosswalk;
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import java.util.HashMap;
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import java.util.Properties;
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import org.apache.log4j.Logger;
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import ORG.oclc.oai.server.crosswalk.Crosswalk;
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import ORG.oclc.oai.server.verb.CannotDisseminateFormatException;
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import ORG.oclc.oai.server.verb.OAIInternalServerError;
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/**
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* Provides eml-2.0.0 documents. We simply return the metadata that was read
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* from Metacat.
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*/
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public class Eml200 extends Crosswalk {
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/* Class fields */
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private static final Logger logger = Logger.getLogger(Eml200.class);
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private static final String SCHEMA_LOCATION =
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"eml://ecoinformatics.org/eml-2.0.0 " +
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"http://knb.ecoinformatics.org/knb/schema/eml-2.0.0/eml.xsd";
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/* Constructors */
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/**
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* The constructor assigns the schemaLocation associated with this crosswalk.
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* Since the crosswalk is trivial in this case, no properties are utilized.
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*
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* @param properties
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* properties that are needed to configure the crosswalk.
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*/
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public Eml200(Properties properties) throws OAIInternalServerError {
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super(SCHEMA_LOCATION);
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}
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/* Class methods */
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/* Instance methods */
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/**
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* Perform the actual crosswalk.
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*
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* @param nativeItem A HashMap object that contains the EML string that was
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* retrieved from Metacat and stored as the value of the
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* "recordBytes" key
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*
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* @return emlDoc a String containing the metadata to be stored within
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* the <metadata> element
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*
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* @exception CannotDisseminateFormatException
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* nativeItem doesn't support this format.
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*/
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public String createMetadata(Object nativeItem)
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throws CannotDisseminateFormatException {
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HashMap recordMap = (HashMap) nativeItem;
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String xmlRec = (String) recordMap.get("recordBytes");
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String emlDoc = xmlRec.trim();
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/*
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* Remove leading XML processing instructions because the document is going
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* to be placed inside an OAI <metadata> element.
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*/
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while (emlDoc.startsWith("<?")) {
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int offset = emlDoc.indexOf("?>");
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emlDoc = emlDoc.substring(offset + 2).trim();
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}
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return emlDoc;
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}
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/**
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* Can this nativeItem be represented in 'eml-2.0.0' format?
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*
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* @param nativeItem a record in native format
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* @return true if 'eml-2.0.0' format is possible, false otherwise.
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*/
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public boolean isAvailableFor(Object nativeItem) {
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boolean isAvailable = false;
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HashMap recordMap = (HashMap) nativeItem;
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String doctype = (String) recordMap.get("doctype");
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if (doctype.equals("eml://ecoinformatics.org/eml-2.0.0")) {
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isAvailable = true;
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}
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return isAvailable;
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}
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}
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