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1 /*******************************************************************************

4 * are made available under the terms of the Eclipse Public License v1.0

5 * which accompanies this distribution, and is available at

6 * http://www.eclipse.org/legal/epl-v10.html

8 * Contributors:

9 * Obeo - initial API and implementation

10 *******************************************************************************/

package org.eclipse.emf.compare.ide.internal.utils;

13 import java.io.IOException;

14 import java.io.InputStream;

15 import java.util.Collections;

16 import java.util.Map;

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.emf.common.util.URI;

import org.eclipse.emf.compare.ide.EMFCompareIDEPlugin;

import org.eclipse.emf.ecore.resource.URIConverter;

import org.eclipse.emf.ecore.resource.URIHandler;

29 /**

30 * This implementation of an {@link IStorage} will allow us to keep track of the {@link URIHandler} that's

31 * been used to load a given URI from this uri converter.

32 *

33 * @author <a href="mailto:laurent.goubet@obeo.fr">Laurent Goubet</a>

34 */

35 public class URIStorage implements IStorage {

36 /** The target URI of this storage. */

37 private final URI uri;

39 /** The URI Handler that's been used to retrieve this URI's contents. */

40 private final URIHandler handler;

42 /** The URI converter from which this storage was created. */

43 private URIConverter converter;

45 /**

46 * Creates an URIStorage for the given URI an its associated handler.

47 *

48 * @param uri

49 * The target uri of this storage.

50 * @param handler

51 * The URI handler that can be used to retrieve this URI's contents.

52 * @param converter

53 * The URI converter which created this storage.

54 */

        public URIStorage(URI uri, URIHandler handler, URIConverter converter) {

56 this.uri = uri;

57 this.handler = handler;

58 this.converter = converter;

59 }

61 /**

62 * {@inheritDoc}

63 *

64 * @see org.eclipse.core.runtime.IAdaptable#getAdapter(java.lang.Class)

65 */

66 @SuppressWarnings("unchecked")

        public Object getAdapter(@SuppressWarnings("rawtypes") Class adapter) {

68 return null;

69 }

71 /**

72 * {@inheritDoc}

73 *

74 * @see org.eclipse.core.resources.IStorage#getContents()

75 */

        public InputStream getContents() throws CoreException {

                final Map<?, ?> options = Collections.singletonMap(URIConverter.OPTION_URI_CONVERTER, converter);

78 try {

                        return handler.createInputStream(uri, options);

80 } catch (IOException e) {

                        throw new CoreException(new Status(IStatus.ERROR, EMFCompareIDEPlugin.PLUGIN_ID, e.getMessage(),

82 e));

83 }

84 }

86 /**

87 * {@inheritDoc}

88 *

89 * @see org.eclipse.core.resources.IStorage#getFullPath()

90 */

91 public IPath getFullPath() {

92 final String path;

                if (uri.isRelative()) {

94 path = uri.toString();

                } else if (uri.isPlatformResource()) {

                        path = uri.toPlatformString(true);

97 } else {

98 path = uri.toString();

99 }

100 return new Path(path);

101 }

102

103 /**

104 * {@inheritDoc}

105 *

106 * @see org.eclipse.core.resources.IStorage#getName()

107 */

108 public String getName() {

                return URI.decode(uri.lastSegment());

110 }

111

112 /**

113 * {@inheritDoc}

114 *

115 * @see org.eclipse.core.resources.IStorage#isReadOnly()

116 */

117 public boolean isReadOnly() {

                final Map<?, ?> options = Collections.singletonMap(URIConverter.OPTION_REQUESTED_ATTRIBUTES,

                                Collections.singleton(URIConverter.ATTRIBUTE_READ_ONLY));

                final Map<String, ?> attributes = handler.getAttributes(uri, options);

                return Boolean.TRUE.equals(attributes.get(URIConverter.ATTRIBUTE_READ_ONLY));

122 }

123 }