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// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// ResourceFileSelectionValidator
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//
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package com.symbian.smt.gui.smtwidgets.resources;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.net.URLConnection;
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import java.util.List;
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import com.symbian.smt.gui.Logger;
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import com.symbian.smt.gui.ResourceFileValidator;
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import com.symbian.smt.gui.ResourcesEnums;
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import com.symbian.smt.gui.smtwidgets.IXmlFileInputValidator;
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import com.symbian.smt.gui.smtwidgets.InvalidPathException;
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/**
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* @author barbararosi-schwartz
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*
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*/
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public class ResourceFileSelectionValidator extends ResourceFileValidator
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implements IXmlFileInputValidator {
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private List<CheckableResourceFilename> existingFilenames;
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public ResourceFileSelectionValidator(ResourcesEnums selectedResourceType,
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List<CheckableResourceFilename> filenames) {
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super(selectedResourceType);
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this.existingFilenames = filenames;
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}
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/* (non-Javadoc)
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* @see com.symbian.smt.gui.smtwidgets.IFileInputValidator#isFileReadable(java.lang.String)
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*/
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public String isFileReadable(String filePath) {
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String errorMessage = null;
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File inFile = new File(filePath);
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if (!inFile.canRead()) {
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return "Selected file cannot be read.";
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}
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return errorMessage;
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}
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/* (non-Javadoc)
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* @see com.symbian.smt.gui.smtwidgets.IFileInputValidator#isUrl(java.lang.String)
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*/
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public boolean isUrl(String filePath) throws InvalidPathException {
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int index = filePath.indexOf(':');
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if (index == -1 || index == 1) {
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return false;
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} else if (index > 1) {
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return true;
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} else {
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throw new InvalidPathException("Unexpected file path format.");
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}
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}
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/* (non-Javadoc)
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* @see com.symbian.smt.gui.smtwidgets.IFileInputValidator#isUrlResourceReadable(java.lang.String)
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*/
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public String isUrlResourceReadable(String filePath) {
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String errorMessage = null;
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InputStream urlInputStream = null;
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try {
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URL fileURL = new URL(filePath);
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URLConnection connection = fileURL.openConnection();
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String contentType = null;
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try {
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contentType = connection.getContentType();
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} catch (Exception e) {
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return "Resource at specified URL cannot be found.";
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}
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if (contentType == null) {
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return "Resource at specified URL cannot be found.";
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}
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if (!contentType.endsWith("xml")) {
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return "Specified URL is not an XML document.";
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}
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urlInputStream = connection.getInputStream();
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if (urlInputStream == null) {
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errorMessage = "Resource at specified URL cannot be read.";
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}
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/*
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* Snippet below is just for diagnostics else { int bytes; while
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* ((bytes = urlInputStream.available()) > 0) { byte[] b = new
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* byte[bytes];
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*
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* urlInputStream.read(b); String s = new String(b);
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*
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* System.err.println(s); } }
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*/
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} catch (IllegalArgumentException e) {
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errorMessage = "Resource at specified URL cannot be read.";
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} catch (MalformedURLException e) {
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errorMessage = "Specified URL is not a valid URL.";
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} catch (IOException e) {
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errorMessage = "Resource at specified URL cannot be reached.";
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} finally {
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if (urlInputStream != null) {
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try {
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urlInputStream.close();
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} catch (IOException ignore) {
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Logger.log(ignore.getMessage(), ignore);
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}
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urlInputStream = null;
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}
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}
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return errorMessage;
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}
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private String isUrlValid(String url) {
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String errorMessage = null;
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try {
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URL inputUrl = new URL(url);
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inputUrl.openConnection();
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} catch (MalformedURLException e) {
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errorMessage = "Specified URL is not a valid URL.";
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} catch (IOException e) {
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errorMessage = "Resource at specified URL cannot be reached.";
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}
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return errorMessage;
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}
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/*
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* @see org.eclipse.jface.dialogs.IInputValidator#isValid(java.lang.String)
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*/
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public String isValid(String filePath) {
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if (filePath == null || filePath.length() == 0) {
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return "";
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} else {
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return validateResourceWhileUserTypes(filePath);
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}
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}
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/* (non-Javadoc)
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* @see com.symbian.smt.gui.smtwidgets.IXmlFileInputValidator#isXmlValid(java.lang.String)
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*/
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public String isXmlValid(String filePath) {
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return validateXml(filePath);
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}
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private String validateResourceWhileUserTypes(String filePath) {
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String errorMessage = null;
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// First check path is not UNC
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if (filePath.startsWith(File.separator)) {
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return "UNC paths are not compatible with the System Model Manager";
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}
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// Then check that filename (path) is not duplicate
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// by checking name against table
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if (existingFilenames != null) {
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if (ResourcesWidgetHelper.contains(existingFilenames, filePath)) {
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return "The selected file has already been assigned.";
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}
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}
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// Then check that path is appropriate
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try {
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if (isUrl(filePath)) {
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errorMessage = isUrlValid(filePath);
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} else {
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errorMessage = isFileReadable(filePath);
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}
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} catch (InvalidPathException e) {
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errorMessage = e.getMessage();
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}
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return errorMessage;
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}
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}
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