/*******************************************************************************
 * Copyright (c) 2009, 2010 Progress Software Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 ******************************************************************************/
package org.fusesource.tools.core.ui.url.editor.resource;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import org.eclipse.core.resources.IStorage;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.IPersistableElement;
import org.eclipse.ui.PlatformUI;

/*
 */

public class DefaultURLEditorInput implements URLEditorInput {

    private URL url;

    public DefaultURLEditorInput(URL url) {
        if (url == null) {
            throw new IllegalArgumentException();
        }
        this.url = url;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (!(obj instanceof URLEditorInput)) {
            return false;
        }
        URLEditorInput other = (URLEditorInput) obj;
        return url.equals(other.getURL());
    }

    @Override
    public int hashCode() {
        return url.hashCode();
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.sonicsw.tools.plugin.editor.resource.URLEditorInput#getURL()
     */
    public URL getURL() {
        return url;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.ui.IEditorInput#exists()
     */
    public boolean exists() {
        // return url.exists();
        // TODO
        return true;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.ui.IEditorInput#getImageDescriptor()
     */
    public ImageDescriptor getImageDescriptor() {
        return PlatformUI.getWorkbench().getEditorRegistry().getImageDescriptor(url.getFile());
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.ui.IEditorInput#getName()
     */
    public String getName() {
        return url.toString();
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.ui.IEditorInput#getPersistable()
     */
    public IPersistableElement getPersistable() {
        return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.ui.IEditorInput#getToolTipText()
     */
    public String getToolTipText() {
        return url.toString();
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.core.runtime.IAdaptable#getAdapter(java.lang.Class)
     */
    public Object getAdapter(Class adapter) {
        if (adapter == URL.class) {
            return url;
        }
        return null;
    }

    public IStorage getStorage() throws CoreException {
        return new IStorage() {
            public InputStream getContents() throws CoreException {
                try {
                    return url.openStream();
                } catch (IOException e) {
                    throw new CoreException(new Status(IStatus.ERROR, "", 0, "Could not read URL: " + url, e));
                }
            }

            public IPath getFullPath() {
                return new Path(url.toString());
            }

            public String getName() {
                return url.getPath();
            }

            public boolean isReadOnly() {
                return true;
            }

            public Object getAdapter(Class aClass) {
                return DefaultURLEditorInput.this.getAdapter(aClass);
            }
        };
    }
}