SdkManager.java

package org.zend.php.zendserver.deployment.core.sdk;

import java.io.IOException;
import java.net.URL;
import java.text.MessageFormat;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.preferences.IEclipsePreferences.IPreferenceChangeListener;
import org.eclipse.core.runtime.preferences.IEclipsePreferences.PreferenceChangeEvent;
import org.osgi.framework.BundleException;
import org.zend.php.zendserver.deployment.core.DeploymentCore;
import org.zend.php.zendserver.deployment.core.Messages;



public class SdkManager implements IPreferenceChangeListener {

	public static final String SDK_PATH = "sdk_path"; //$NON-NLS-1$

	private Sdk currentSdk;
	
	public SdkManager() throws BundleException {
		String path = DeploymentCore.getPreferenceScope().get(SDK_PATH, getDefaultSdkPath());
		currentSdk = new Sdk(path);
		currentSdk.install();
	}
	
	public static String getDefaultSdkPath() {
		URL url = FileLocator.find(DeploymentCore.getContext().getBundle(), new Path("/sdk"), null); //$NON-NLS-1$
		URL fileUrl = null;
		if (url != null) {
			try {
				fileUrl = FileLocator.toFileURL(url);
			} catch (IOException e) {
				DeploymentCore.log(e);
			}
		}
		
		return fileUrl == null ? null : fileUrl.getPath();
	}
	
	private void updateSdk(String path) throws CoreException {
		Sdk newSdk = new Sdk(path);
		String error = newSdk.validate();
		if (error != null) {
			throw new CoreException(new Status(IStatus.ERROR,
					DeploymentCore.PLUGIN_ID, error));
		}

		if (currentSdk != null) {
			try {
				currentSdk.uninstall();
			} catch (BundleException e) {
				throw new CoreException(new Status(IStatus.ERROR,
						DeploymentCore.PLUGIN_ID, MessageFormat.format(
								Messages.SdkManager_UninstallError,
								e.getMessage()), e));
			}
		}

		try {
			newSdk.install();
			currentSdk = newSdk;
		} catch (BundleException e) {
			throw new CoreException(new Status(IStatus.ERROR,
					DeploymentCore.PLUGIN_ID, MessageFormat.format(
							Messages.SdkManager_InstallError, e.getMessage()),
					e));
		}
	}

	public void preferenceChange(PreferenceChangeEvent event) {
		if (SDK_PATH.equals(event.getKey())) {
			try {
				updateSdk((String) event.getNewValue());
			} catch (CoreException e) {
				DeploymentCore.log(e); // TODO handle showing errors
			}
		}
		
	}

	public boolean isInstalled() {
		return true; // currently always true, because install happens in constructor
	}	
}