cswmetadatacatalog.java

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package com.esri.solutions.jitk.common.metadata.csw;

import com.esri.solutions.jitk.common.metadata.IMetadataCatalog;
import com.esri.solutions.jitk.common.metadata.IMetadataDAO;
import com.esri.solutions.jitk.common.metadata.IMetadataDocument;
import com.esri.solutions.jitk.common.metadata.IMetadataID;
import com.esri.solutions.jitk.common.metadata.InvalidMetadataOperationException;

import java.util.HashMap;
import java.util.List;
import java.util.Map;


/**
 * {@code CSWMetadataCatalog} is a custom {@link IMetadataCatalog} that retrieves metadata from
 * an Open Geospatial Consortium (OGC) Catalog Service for the Web (CSW).
 */
public class CSWMetadataCatalog implements IMetadataCatalog {
    /**
     * Id of the CS/W metadata catalog.
     */
    private String _id = null;

    /**
     * Reference to a {@link IMetadataDAO} object that will access metadata
     * from the CS/W service.
     */
    private IMetadataDAO _dao = null;

    /**
     * Reference to the {@link CSWMetadataProfile} that contains information
     * on how to create requests and parse responses.
     */
    private CSWMetadataProfile _profile = null;

    /**
     * Name of the CS/W metadata catalog.
     */
    private String _name = null;

    /**
     * Url to the CS/W metadata catalog.
     */
    private String _serviceURL = null;

    /**
     * {@link Map} of configuration parameters.
     */
    private Map<String, Object> _attributes = new HashMap<String, Object>();

    /**
     * Default constructor; does nothing other than instantiate
     * a new, unconfigured instance of the class
     */
    public CSWMetadataCatalog() {
    }

    /* (non-Javadoc)
     * @see com.esri.solutions.jitk.common.metadata.IMetadataCatalog#getAttribute(java.lang.String)
     */
    public Object getAttribute(String key) {
        if (key == null) {
            throw new NullPointerException("key cannot be null");
        }

        return _attributes.get(key);
    }

    /* (non-Javadoc)
     * @see com.esri.solutions.jitk.common.metadata.IMetadataCatalog#getAttributes()
     */
    public Map<String, Object> getAttributes() {
        // TODO Auto-generated method stub
        return _attributes;
    }

    /* (non-Javadoc)
     * @see com.esri.solutions.jitk.common.metadata.IMetadataCatalog#setAttribute(java.lang.String, java.lang.Object)
     */
    public void setAttribute(String key, Object value) {
        if (key == null) {
            throw new NullPointerException("key cannot be null");
        }

        _attributes.put(key, value);
    }

    /* (non-Javadoc)
     * @see com.esri.solutions.jitk.common.metadata.IMetadataCatalog#setAttributes(java.util.Map)
     */
    public void setAttributes(Map<?extends String, ?extends Object> attrs) {
        if (attrs == null) {
            throw new NullPointerException("attrs cannot be null");
        }

        _attributes.putAll(attrs);
    }

    /**
     * Sets an ID by which this catalog can be reference.
     * @param id {@link String} containing the ID; cannot be {@code null}
     */
    public void setId(String id) {
        if (id == null) {
            throw new NullPointerException("id cannot be null");
        }

        _id = id;
    }

    /* (non-Javadoc)
     * @see com.esri.solutions.jitk.common.metadata.IMetadataCatalog#getId()
     */
    public String getId() {
        return _id;
    }

    /**
     * Sets the common name by which this CS/W Metadata Catalog can be referred.  This
     * name will be useful in applications where a reference to this catalog will be
     * displayed in a GUI.
     * @param name {@link String} containing the name; cannot be {@code null}
     */
    public void setName(String name) {
        if (name == null) {
            throw new NullPointerException("name cannot be null");
        }

        _name = name;
    }

    /*
     * (non-Javadoc)
     * @see com.esri.solutions.jitk.common.metadata.IMetadataCatalog#getName()
     */
    public String getName() {
        return _name;
    }

    /**
     * Sets the URL of the CS/W endpoint to which this catalog will connect to retrieve metadata.
     * @param serviceURL {@link String} containing the Service URL; cannot be {@code null}
     */
    public void setServiceURL(String serviceURL) {
        if (serviceURL == null) {
            throw new NullPointerException("serviceURL cannot be null");
        }

        _serviceURL = serviceURL;
    }

    /**
     * Retrieves the URL of the CS/W endpoint to which this catalog will connect to retrieve metadata.
     * @return {@link String} containing the service URL.
     */
    public String getServiceURL() {
        return _serviceURL;
    }

    /**
     * Sets the Metadata Profile used by this catalog to access and parse metadata.
     * @param profile cannot be {@code null}
     */
    public void setMetadataProfile(CSWMetadataProfile profile) {
        if (profile == null) {
            throw new NullPointerException("profile cannot be null");
        }

        _profile = profile;
    }
    
    /**
     * Sets the Metadata Profile used by this catalog to access and parse metadata.
     * @param profile cannot be {@code null}
     */
    public void setMetadataProfile2(CSWMetadataProfile profile) {
        if (profile == null) {
            throw new NullPointerException("profile cannot be null");
        }

        _profile = profile;
    }

    /*
     * (non-Javadoc)
     * @see com.esri.solutions.jitk.common.metadata.IMetadataCatalog#setMetadataDAO(com.esri.solutions.jitk.common.metadata.IMetadataDAO)
     */
    public void setMetadataDAO(IMetadataDAO dao) {
        Map<String, Object> props = null;

        if (dao == null) {
            throw new NullPointerException("dao cannot be null");
        }

        _dao = dao;

        props = new HashMap<String, Object>();

        props.put("catalog", this);

        _dao.setProperties(props);
    }

    /*
     * (non-Javadoc)
     * @see com.esri.solutions.jitk.common.metadata.IMetadataCatalog#getMetadataProfile()
     */
    public CSWMetadataProfile getMetadataProfile() {
        return _profile;
    }

    /*
     * (non-Javadoc)
     * @see com.esri.solutions.jitk.common.metadata.IMetadataCatalog#lookup(com.esri.solutions.jitk.common.metadata.IMetadataID)
     */
    public IMetadataDocument lookup(IMetadataID id) {
        IMetadataDocument doc = _dao.getDocumentByID(id);

        return doc;
    }

    /*
     * (non-Javadoc)
     * @see com.esri.solutions.jitk.common.metadata.IMetadataCatalog#lookupRepositoryItem(com.esri.solutions.jitk.common.metadata.IMetadataID)
     */
    public IMetadataDocument lookupRepositoryItem(IMetadataID id)
        throws InvalidMetadataOperationException {
        IMetadataDocument doc = _dao.getRepositoryItemByID(id);

        return doc;
    }

    /*
     * (non-Javadoc)
     * @see com.esri.solutions.jitk.common.metadata.IMetadataCatalog#lookup(java.util.Map)
     */
    public List<IMetadataDocument> lookup(Map<String, Object> criteria) {
        List<IMetadataDocument> results = null;

        results = _dao.findDocuments(criteria);

        return results;
    }
}