org.datacleaner.util.ChangeAwareObjectInputStream Maven / Gradle / Ivy
/**
* DataCleaner (community edition)
* Copyright (C) 2014 Neopost - Customer Information Management
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.datacleaner.util;
import java.beans.PropertyDescriptor;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectStreamClass;
import java.io.ObjectStreamField;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeMap;
import org.apache.metamodel.util.EqualsBuilder;
import org.apache.metamodel.util.HasName;
import org.apache.metamodel.util.LegacyDeserializationObjectInputStream;
import org.datacleaner.api.AnalyzerResult;
import org.datacleaner.api.AnalyzerResultReducer;
import org.datacleaner.api.ComponentCategory;
import org.datacleaner.api.HasAnalyzerResult;
import org.datacleaner.api.InputColumn;
import org.datacleaner.api.InputRow;
import org.datacleaner.api.Metric;
import org.datacleaner.api.Renderable;
import org.datacleaner.connection.Datastore;
import org.datacleaner.connection.SchemaNavigator;
import org.datacleaner.descriptors.MetricDescriptor;
import org.datacleaner.job.ComponentConfiguration;
import org.datacleaner.job.ComponentJob;
import org.datacleaner.job.ImmutableComponentConfiguration;
import org.datacleaner.reference.TextFileDictionary;
import org.datacleaner.reference.TextFileSynonymCatalog;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* {@link ObjectInputStream} implementation that is aware of changes such as
* class or package renaming. This can be used to deserialize classes with
* historic/legacy class names.
*
* Furthermore the deserialization mechanism is aware of multiple
* {@link ClassLoader}s. This means that if the object being deserialized
* pertains to a different {@link ClassLoader}, then this classloader can be
* added using the {@link #addClassLoader(ClassLoader)} method.
*
*
*/
public class ChangeAwareObjectInputStream extends LegacyDeserializationObjectInputStream {
private static final Logger logger = LoggerFactory.getLogger(ChangeAwareObjectInputStream.class);
/**
* Table mapping primitive type names to corresponding class objects. As
* defined in {@link ObjectInputStream}.
*/
private static final Map> PRIMITIVE_CLASSES = new HashMap>(8, 1.0F);
/**
* Since the change from eobjects.org MetaModel to Apache MetaModel, a lot
* of interfaces (especially those that extend {@link HasName}) have
* transparently changed their serialization IDs.
*/
private static final Set INTERFACES_WITH_SERIAL_ID_CHANGES = new HashSet();
static {
PRIMITIVE_CLASSES.put("boolean", boolean.class);
PRIMITIVE_CLASSES.put("byte", byte.class);
PRIMITIVE_CLASSES.put("char", char.class);
PRIMITIVE_CLASSES.put("short", short.class);
PRIMITIVE_CLASSES.put("int", int.class);
PRIMITIVE_CLASSES.put("long", long.class);
PRIMITIVE_CLASSES.put("float", float.class);
PRIMITIVE_CLASSES.put("double", double.class);
PRIMITIVE_CLASSES.put("void", void.class);
INTERFACES_WITH_SERIAL_ID_CHANGES.add(InputColumn.class.getName());
INTERFACES_WITH_SERIAL_ID_CHANGES.add(ComponentJob.class.getName());
INTERFACES_WITH_SERIAL_ID_CHANGES.add(Datastore.class.getName());
INTERFACES_WITH_SERIAL_ID_CHANGES.add(MetricDescriptor.class.getName());
INTERFACES_WITH_SERIAL_ID_CHANGES.add(PropertyDescriptor.class.getName());
INTERFACES_WITH_SERIAL_ID_CHANGES.add(ComponentCategory.class.getName());
INTERFACES_WITH_SERIAL_ID_CHANGES.add("org.datacleaner.beans.writers.WriteDataResult");
}
private static final Comparator packageNameComparator = new Comparator() {
@Override
public int compare(String o1, String o2) {
if (EqualsBuilder.equals(o1, o2)) {
return 0;
}
// use length as the primary differentiator, to make sure long
// packages are placed before short ones.
int diff = o1.length() - o2.length();
if (diff == 0) {
diff = o1.compareTo(o2);
}
return diff;
}
};
private final List additionalClassLoaders;
private final Map renamedPackages;
private final Map renamedClasses;
public ChangeAwareObjectInputStream(InputStream in) throws IOException {
super(in);
renamedPackages = new TreeMap(packageNameComparator);
renamedClasses = new HashMap();
additionalClassLoaders = new ArrayList();
// add analyzerbeans' own renamed classes
addRenamedClass("org.datacleaner.reference.TextBasedDictionary", TextFileDictionary.class);
addRenamedClass("org.datacleaner.reference.TextBasedSynonymCatalog", TextFileSynonymCatalog.class);
// analyzer results moved as of ticket #843
addRenamedClass("org.datacleaner.result.PatternFinderResult",
"org.datacleaner.beans.stringpattern.PatternFinderResult");
addRenamedClass("org.datacleaner.result.DateGapAnalyzerResult",
"org.datacleaner.beans.dategap.DateGapAnalyzerResult");
addRenamedClass("org.datacleaner.util.TimeInterval", "org.datacleaner.beans.dategap.TimeInterval");
addRenamedClass("org.datacleaner.result.StringAnalyzerResult", "org.datacleaner.beans.StringAnalyzerResult");
addRenamedClass("org.datacleaner.result.NumberAnalyzerResult", "org.datacleaner.beans.NumberAnalyzerResult");
addRenamedClass("org.datacleaner.result.BooleanAnalyzerResult", "org.datacleaner.beans.BooleanAnalyzerResult");
addRenamedClass("org.datacleaner.result.DateAndTimeAnalyzerResult",
"org.datacleaner.beans.DateAndTimeAnalyzerResult");
// analyzer results moved as of ticket #993
addRenamedClass("org.datacleaner.result.ValueDistributionGroupResult",
"org.datacleaner.beans.valuedist.SingleValueDistributionResult");
addRenamedClass("org.datacleaner.result.ValueDistributionResult",
"org.datacleaner.beans.valuedist.GroupedValueDistributionResult");
addRenamedClass("org.datacleaner.beans.valuedist.ValueDistributionGroupResult",
"org.datacleaner.beans.valuedist.SingleValueDistributionResult");
addRenamedClass("org.datacleaner.beans.valuedist.ValueDistributionResult",
"org.datacleaner.beans.valuedist.GroupedValueDistributionResult");
addRenamedClass("org.datacleaner.beans.valuedist.ValueCount", "org.datacleaner.result.SingleValueFrequency");
addRenamedClass("org.datacleaner.result.ValueCount", "org.datacleaner.result.SingleValueFrequency");
addRenamedClass("org.datacleaner.beans.valuedist.ValueCountList", "org.datacleaner.result.ValueCountList");
addRenamedClass("org.datacleaner.beans.valuedist.ValueCountListImpl",
"org.datacleaner.result.ValueCountListImpl");
// duplicate detection analyzer changed
final String duplicateDetectionClassName = "com.hi.hiqmr.packaging.datacleaner.deduplication.DuplicateDetectionAnalyzer";
addRenamedClass("com.hi.contacts.datacleaner.DuplicateDetectionAnalyzer", duplicateDetectionClassName);
addRenamedClass("com.hi.hiqmr.datacleaner.deduplication.Identify7DeduplicationAnalyzer",
duplicateDetectionClassName);
addRenamedClass("com.hi.hiqmr.datacleaner.deduplication.DuplicateDetectionAnalyzer",
duplicateDetectionClassName);
addRenamedClass("com.hi.hiqmr.deduplication.DuplicateDetectionAnalyzer", duplicateDetectionClassName);
addRenamedPackage("com.hi.contacts.security", "com.hi.common.client.security");
// Classes moved in DC 4.0
addRenamedClass("org.datacleaner.data.InputRow", InputRow.class);
addRenamedClass("org.datacleaner.data.InputColumn", InputColumn.class);
addRenamedClass("org.datacleaner.result.Metric", Metric.class);
addRenamedClass("org.datacleaner.job.BeanConfiguration", ComponentConfiguration.class);
addRenamedClass("org.datacleaner.job.ImmutableBeanConfiguration", ImmutableComponentConfiguration.class);
addRenamedClass("org.datacleaner.descriptors.AnnotationBasedAnalyzerBeanDescriptor",
"org.datacleaner.descriptors.AnnotationBasedAnalyzerComponentDescriptor");
addRenamedClass("org.datacleaner.descriptors.AnnotationBasedTransformerBeanDescriptor",
"org.datacleaner.descriptors.AnnotationBasedTransformerComponentDescriptor");
addRenamedClass("org.datacleaner.descriptors.AnnotationBasedFilterBeanDescriptor",
"org.datacleaner.descriptors.AnnotationBasedFilterComponentDescriptor");
addRenamedClass("org.datacleaner.descriptors.AbstractHasAnalyzerResultBeanDescriptor",
"org.datacleaner.descriptors.AbstractHasAnalyzerResultComponentDescriptor");
addRenamedClass("org.datacleaner.descriptors.AbstractBeanDescriptor",
"org.datacleaner.descriptors.AbstractComponentDescriptor");
addRenamedClass("org.eobjects.analyzer.result.AnalyzerResult", AnalyzerResult.class);
addRenamedClass("org.eobjects.analyzer.result.AnalyzerResultReducer", AnalyzerResultReducer.class);
addRenamedClass("org.eobjects.analyzer.result.HasAnalyzerResult", HasAnalyzerResult.class);
addRenamedClass("org.eobjects.analyzer.result.Metric", Metric.class);
addRenamedClass("org.eobjects.analyzer.result.renderer.Renderable", Renderable.class);
addRenamedClass("org.eobjects.analyzer.util.SchemaNavigator", SchemaNavigator.class);
// General namespace change as of DC 4.0
addRenamedPackage("org.eobjects.datacleaner", "org.datacleaner");
addRenamedPackage("org.eobjects.analyzer", "org.datacleaner");
addRenamedPackage("org.datacleaner.beans.api", "org.datacleaner.api");
addRenamedPackage("org.datacleaner.beans.categories", "org.datacleaner.components.categories");
// Change from eobjects.org MetaModel to Apache MetaModel
addRenamedPackage("org.eobjects.metamodel", "org.apache.metamodel");
// DataCleaner output writers package changed
addRenamedPackage("org.datacleaner.output.beans", "org.datacleaner.extension.output");
}
public void addClassLoader(ClassLoader classLoader) {
additionalClassLoaders.add(classLoader);
}
public void addRenamedPackage(String originalPackageName, String newPackageName) {
renamedPackages.put(originalPackageName, newPackageName);
}
public void addRenamedClass(String originalClassName, Class newClass) {
addRenamedClass(originalClassName, newClass.getName());
}
public void addRenamedClass(String originalClassName, String newClassName) {
renamedClasses.put(originalClassName, newClassName);
}
@Override
protected ObjectStreamClass readClassDescriptor() throws IOException, ClassNotFoundException {
final ObjectStreamClass resultClassDescriptor = super.readClassDescriptor();
final String originalClassName = resultClassDescriptor.getName();
final String className = getClassNameRenamed(originalClassName);
if (className != originalClassName) {
return getClassDescriptor(className, false, resultClassDescriptor);
}
if (INTERFACES_WITH_SERIAL_ID_CHANGES.contains(originalClassName)) {
final ObjectStreamClass newClassDescriptor = ObjectStreamClass
.lookup(resolveClass(originalClassName, false));
return newClassDescriptor;
}
return resultClassDescriptor;
}
private ObjectStreamClass getClassDescriptor(final String className, final boolean checkRenames,
final ObjectStreamClass originalClassDescriptor) throws ClassNotFoundException {
if (originalClassDescriptor == null) {
logger.warn("Original ClassDescriptor resolved to null for '{}'", className);
}
final Class newClass = resolveClass(className, checkRenames);
final ObjectStreamClass newClassDescriptor = ObjectStreamClass.lookupAny(newClass);
if (newClassDescriptor == null) {
logger.warn("New ClassDescriptor resolved to null for {}", newClass);
}
final String[] newFieldNames = getFieldNames(newClassDescriptor);
final String[] originalFieldNames = getFieldNames(originalClassDescriptor);
if (!EqualsBuilder.equals(originalFieldNames, newFieldNames)) {
logger.warn("Field names of original and new class ({}) does not correspond!", className);
// try to hack our way out of it by changing the value of the "name"
// field in the ORIGINAL descriptor
try {
Field field = ObjectStreamClass.class.getDeclaredField("name");
assert field != null;
assert field.getType() == String.class;
field.setAccessible(true);
field.set(originalClassDescriptor, className);
return originalClassDescriptor;
} catch (Exception e) {
logger.error("Unsuccesful attempt at changing the name of the original class descriptor");
if (e instanceof RuntimeException) {
throw (RuntimeException) e;
}
throw new IllegalStateException(e);
}
}
return newClassDescriptor;
}
@Override
protected Class resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException {
final String className = desc.getName();
if (className.startsWith("org.eobjects.metamodel") || className.startsWith("[Lorg.eobjects.metamodel")) {
return super.resolveClass(desc);
}
return resolveClass(className, true);
}
private Class resolveClass(final String classNameParameter, boolean checkRenames) throws ClassNotFoundException {
logger.debug("Resolving class '{}'", classNameParameter);
final String className;
if (checkRenames) {
className = getClassNameRenamed(classNameParameter);
} else {
className = classNameParameter;
}
try {
return Class.forName(className);
} catch (ClassNotFoundException e) {
final Class primitiveClass = PRIMITIVE_CLASSES.get(className);
if (primitiveClass != null) {
return primitiveClass;
}
logger.info("Class '{}' was not resolved in main class loader.", className);
final List exceptions = new ArrayList(additionalClassLoaders.size());
for (ClassLoader classLoader : additionalClassLoaders) {
try {
return Class.forName(className, true, classLoader);
} catch (ClassNotFoundException minorException) {
logger.info("Class '{}' was not resolved in additional class loader '{}'", className, classLoader);
exceptions.add(minorException);
}
}
logger.warn("Could not resolve class of name '{}'", className);
// if we reach this stage, all classloaders have failed, log their
// issues
int i = 1;
for (final Exception exception : exceptions) {
int numExceptions = exceptions.size();
logger.error("Exception " + i + " of " + numExceptions, exception);
i++;
}
throw e;
}
}
private String getClassNameRenamed(String className) {
return getClassNameRenamed(className, true);
}
private String getClassNameRenamed(String className, boolean includeRenamedPackages) {
// handle array definitions
if (className.startsWith("[L")) {
final String classNameWithoutArrayDef = className.substring(2, className.length() - 1);
return "[L" + getClassNameRenamed(classNameWithoutArrayDef) + ";";
}
// handle direct entries for renamed class
final String directlyRenamedClassName = renamedClasses.get(className);
if (directlyRenamedClassName != null) {
logger.info("Class '{}' was encountered. Returning new class name: '{}'", className,
directlyRenamedClassName);
return directlyRenamedClassName;
}
if (includeRenamedPackages) {
// handle renamed packages
final Set> entrySet = renamedPackages.entrySet();
for (Entry entry : entrySet) {
final String legacyPackage = entry.getKey();
if (className.startsWith(legacyPackage)) {
final String renamedClassName = className.replaceFirst(legacyPackage, entry.getValue());
logger.info("Class '{}' was encountered. Adapting to new class name: '{}'", className,
renamedClassName);
return getClassNameRenamed(renamedClassName, includeRenamedPackages);
}
}
}
// ok no rename happened
return className;
}
private String[] getFieldNames(ObjectStreamClass classDescriptor) {
if (classDescriptor == null) {
return new String[0];
}
final ObjectStreamField[] fields = classDescriptor.getFields();
final String[] fieldNames = new String[fields.length];
for (int i = 0; i < fieldNames.length; i++) {
fieldNames[i] = fields[i].getName();
}
return fieldNames;
}
}
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