nodejs/org.eclipse.wst.jsdt.js.npm/src/org/eclipse/wst/jsdt/js/npm/internal/launch/tester/NpmLaunchTester.java

/*******************************************************************************
 * Copyright (c) 2015 Red Hat, Inc. 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * 	Contributors:
 * 		 Red Hat Inc. - initial API and implementation and/or initial documentation
 *******************************************************************************/
package org.eclipse.wst.jsdt.js.npm.internal.launch.tester;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.wst.jsdt.js.npm.NpmPlugin;
import org.eclipse.wst.jsdt.js.npm.util.NpmUtil;
import org.eclipse.core.expressions.PropertyTester;

/**
 * @author Ilya Buziuk (ibuziuk)
 */
public final class NpmLaunchTester extends PropertyTester {
	private static final String IS_NPM_INIT = "isNpmInit"; //$NON-NLS-1$

	public NpmLaunchTester() {
	}

	@Override
	public boolean test(Object receiver, String property, Object[] arg2, Object expectedValue) {
		try {
			if (IS_NPM_INIT.equals(property) && receiver instanceof IResource) {
				IResource resource = (IResource) receiver;
				if (resource instanceof IProject) {
					return NpmUtil.isPackageJsonExist((IProject) resource);
				} else if (resource instanceof IFolder) {
					return NpmUtil.hasPackageJson((IFolder) resource);
				} else if (resource instanceof IFile) {
					return NpmUtil.isPackageJson((IFile) resource);
				}
			}
		} catch (CoreException e) {
			NpmPlugin.logError(e);
		}
		return false;
	}
	
}