1 files changed, 122 insertions, 0 deletions
diff --git a/jpa/plugins/org.eclipse.jpt.eclipselink.core/src/org/eclipse/jpt/eclipselink/core/internal/libval/EclipseLinkUserLibraryValidator.java b/jpa/plugins/org.eclipse.jpt.eclipselink.core/src/org/eclipse/jpt/eclipselink/core/internal/libval/EclipseLinkUserLibraryValidator.java
new file mode 100644
index 0000000000..ba0859952f
--- /dev/null
+++ b/jpa/plugins/org.eclipse.jpt.eclipselink.core/src/org/eclipse/jpt/eclipselink/core/internal/libval/EclipseLinkUserLibraryValidator.java
@@ -0,0 +1,122 @@
+/*******************************************************************************
+ *  Copyright (c) 2010  Oracle. 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
+ *  
+ *  Contributors: 
+ *  	Oracle - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jpt.eclipselink.core.internal.libval;
+
+import java.util.HashSet;
+import java.util.Set;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.jdt.core.IClasspathEntry;
+import org.eclipse.jdt.core.ToolFactory;
+import org.eclipse.jdt.core.util.IClassFileReader;
+import org.eclipse.jdt.core.util.IFieldInfo;
+import org.eclipse.jpt.core.internal.libprov.JpaUserLibraryProviderInstallOperationConfig;
+import org.eclipse.jpt.core.internal.libprov.JptLibraryProviderInstallOperationConfig;
+import org.eclipse.jpt.core.libval.LibraryValidator;
+import org.eclipse.jpt.core.platform.JpaPlatformDescription;
+import org.eclipse.jpt.eclipselink.core.internal.JptEclipseLinkCoreMessages;
+import org.eclipse.jpt.eclipselink.core.internal.JptEclipseLinkCorePlugin;
+import org.eclipse.jpt.eclipselink.core.platform.EclipseLinkPlatform;
+import org.eclipse.jpt.utility.internal.StringTools;
+import org.eclipse.osgi.service.resolver.VersionRange;
+import org.osgi.framework.Version;
+
+/**
+ * Library validator for EclipseLink user libraries.
+ * 
+ * In order to validate that the correct eclipselink.jar is present in the user library, the version
+ * class which appears in standard EclipseLink libraries will be examined and compared against the
+ * union of calculated version ranges, depending on the platform specified in the config.
+ */
+public class EclipseLinkUserLibraryValidator
+	implements LibraryValidator {
+	
+	private final static String VERSION_CLASS_PATH = "org/eclipse/persistence/Version.class";
+	
+	private final static String VERSION_FIELD_NAME = "version";
+	
+	
+	public IStatus validate(JptLibraryProviderInstallOperationConfig config) {
+		JpaUserLibraryProviderInstallOperationConfig jpaConfig 
+				= (JpaUserLibraryProviderInstallOperationConfig) config;
+		JpaPlatformDescription platform = jpaConfig.getJpaPlatform();
+		Set<VersionRange> versionRanges = new HashSet<VersionRange>();
+		if (EclipseLinkPlatform.VERSION_1_0.equals(platform)) {
+			versionRanges.add(new VersionRange("[1.0, 3.0)"));
+		}
+		else if (EclipseLinkPlatform.VERSION_1_1.equals(platform)) {
+			versionRanges.add(new VersionRange("[1.1, 3.0)"));
+		}
+		else if (EclipseLinkPlatform.VERSION_1_2.equals(platform)) {
+			versionRanges.add(new VersionRange("[1.2, 3.0)"));
+		}
+		else if (EclipseLinkPlatform.VERSION_2_0.equals(platform)) {
+			versionRanges.add(new VersionRange("[2.0, 3.0)"));
+		}
+		else if (EclipseLinkPlatform.VERSION_2_1.equals(platform)) {
+			versionRanges.add(new VersionRange("[2.1, 3.0)"));
+		}
+		return validate(jpaConfig, versionRanges);
+	}
+	
+	protected IStatus validate(
+			JpaUserLibraryProviderInstallOperationConfig config, Set<VersionRange> versionRanges) {
+		
+		Version version = null;
+		for (IClasspathEntry cpe : config.resolve()) {
+			String versionString = null;
+			if (cpe.getEntryKind() == IClasspathEntry.CPE_LIBRARY) {
+				IClassFileReader classReader = 
+						ToolFactory.createDefaultClassFileReader(
+							cpe.getPath().toFile().getAbsolutePath(), VERSION_CLASS_PATH, IClassFileReader.FIELD_INFOS);
+				if (classReader != null) {
+					for (IFieldInfo field : classReader.getFieldInfos()) {
+						if (StringTools.stringsAreEqual(field.getName(), VERSION_FIELD_NAME.toCharArray())) {
+							try {
+								versionString = field.getConstantValueAttribute().getConstantValue().getStringValue();
+							}
+							catch (Exception e) {
+								// potentially a bit could go wrong with that last line, but if any
+								// assumptions aren't met, there's no value
+							}
+							break;
+						}
+					}
+				}
+				if (versionString != null) {
+					if (version != null) {
+						return new Status(
+								IStatus.ERROR, JptEclipseLinkCorePlugin.PLUGIN_ID,
+								JptEclipseLinkCoreMessages.EclipseLinkLibraryValidator_multipleEclipseLinkVersions);
+					}
+					else {
+						version = new Version(versionString);
+					}
+				}
+			}
+		}
+		
+		if (version == null) {
+			return new Status(
+					IStatus.ERROR, JptEclipseLinkCorePlugin.PLUGIN_ID, 
+					JptEclipseLinkCoreMessages.EclipseLinkLibraryValidator_noEclipseLinkVersion);
+		}
+		
+		for (VersionRange versionRange : versionRanges) {
+			if (! versionRange.isIncluded(version)) {
+				return new Status(
+						IStatus.ERROR, JptEclipseLinkCorePlugin.PLUGIN_ID, 
+						JptEclipseLinkCoreMessages.EclipseLinkLibraryValidator_improperEclipseLinkVersion);
+			}
+		}
+		
+		return Status.OK_STATUS;
+	}
+}