DataLinkInfoImpl.java

/* (c) 2014 Open Source Geospatial Foundation - all rights reserved
 * (c) 2001 - 2013 OpenPlans
 * This code is licensed under the GPL 2.0 license, available at the root
 * application directory.
 */
package org.geoserver.catalog.impl;

import java.net.MalformedURLException;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Arrays;
import java.util.List;

import org.geoserver.catalog.DataLinkInfo;

public class DataLinkInfoImpl implements DataLinkInfo {

    String id;

    String about;

    String type;

    String content;
    
    public DataLinkInfoImpl() {
        // nothing to do
    }
    
    public DataLinkInfoImpl(DataLinkInfoImpl other) {
        this.id = other.id;
        this.about = other.about;
        this.type = other.type;
        this.content = other.content;
    }


    @Override
    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    @Override
    public String getAbout() {
        return about;
    }

    @Override
    public void setAbout(String about) {
        this.about = about;
    }

    @Override
    public String getType() {
        return type;
    }

    @Override
    public void setType(String type) {
        this.type = type;
    }

    @Override
    public String getContent() {
        return content;
    }

    static final List<String> protocols = Arrays.asList("http", "https", "ftp");
    /**
     * @throws IllegalArgumentException if the url is invalid for use as a Link
     * @param url
     */
    public static void validate(String url) {
        if (url==null) return;
        URL dummy;
        try {
            dummy = new URL("http://dummy/");
        } catch (MalformedURLException ex) {
            throw new IllegalStateException("Could not parse dummy context URL", ex);
        }
        try {
            // Doing this with exceptions isn't ideal but it works, and we're throwing an
            // exception anyway
            
            // The dummy context will allow it to parse relative URLs, which should be allowed.
            URL parsed = new URL(dummy, url);
            String protocol = parsed.getProtocol();
            
            // Converting to URI forces validation
            parsed.toURI();
            
            if(!protocols.contains(protocol)){
                throw new IllegalArgumentException("Protocol "+protocol+" is not supported in url "+url);
            }
        } catch (MalformedURLException | URISyntaxException ex) {
            throw new IllegalArgumentException("Not a valid URL: "+url, ex);
        }
    }
    
    public void setContent(String content) {
        validate(content);
        this.content = content;
    }
    
    private Object readResolve() {
        validate(content);
        return this;
    }
    @Override
    public int hashCode() {
        final int PRIME = 31;
        int result = 1;
        result = PRIME * result + ((about == null) ? 0 : about.hashCode());
        result = PRIME * result + ((content == null) ? 0 : content.hashCode());
        result = PRIME * result + ((type == null) ? 0 : type.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (!(obj instanceof DataLinkInfo)) {
            return false;
        }
            
        final DataLinkInfo other = (DataLinkInfo) obj;
        if (about == null) {
            if (other.getAbout() != null)
                return false;
        } else if (!about.equals(other.getAbout()))
            return false;
        if (content == null) {
            if (other.getContent() != null)
                return false;
        } else if (!content.equals(other.getContent()))
            return false;
        if (type == null) {
            if (other.getType() != null)
                return false;
        } else if (!type.equals(other.getType()))
            return false;
        return true;
    }
    
    @Override
    public String toString() {
        return new StringBuilder(getClass().getSimpleName()).append("[type:").append(type).append(", content:").append(content)
                .append(']').toString();
    }
    
    

}