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Made comparisons case-insensitve and extract DB metadata for tables matching lower- and upper-case prefixes (e.g. act_ and ACT_). git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@35399 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
364 lines
13 KiB
Java
364 lines
13 KiB
Java
/*
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* Copyright (C) 2005-2011 Alfresco Software Limited.
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*
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* This file is part of Alfresco
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*
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* Alfresco is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Alfresco is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.alfresco.util.schemacomp;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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import org.alfresco.util.schemacomp.Difference.Where;
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import org.alfresco.util.schemacomp.model.DbObject;
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import org.alfresco.util.schemacomp.validator.DbValidator;
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/**
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* A collection of utility methods for determining differences between two database schemas.
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*
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* @author Matt Ward
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*/
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public class DefaultComparisonUtils implements ComparisonUtils
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{
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@Override
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public List<DbObject> findEquivalentObjects(DbObject rootObject, DbObject objToMatch)
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{
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EquivalentObjectSeeker objectSeeker = new EquivalentObjectSeeker(objToMatch);
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rootObject.accept(objectSeeker);
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return objectSeeker.getMatches();
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}
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@Override
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public void compareSimpleOrderedLists(DbProperty refProp, DbProperty targetProp, DiffContext ctx)
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{
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checkPropertyContainsList(refProp);
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checkPropertyContainsList(targetProp);
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// Check whether the leftProperty should be compared to the rightProperty
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DbObject leftDbObject = refProp.getDbObject();
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if (leftDbObject.hasValidators())
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{
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for (DbValidator validator : leftDbObject.getValidators())
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{
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if (validator.validates(refProp.getPropertyName()))
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{
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// Don't perform differencing on this property - a validator will handle it.
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return;
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}
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}
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}
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@SuppressWarnings("unchecked")
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ArrayList<Object> refList = new ArrayList<Object>((List<Object>) refProp.getPropertyValue());
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@SuppressWarnings("unchecked")
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ArrayList<Object> targetList = new ArrayList<Object>((List<Object>) targetProp.getPropertyValue());
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Results differences = ctx.getComparisonResults();
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int maxSize = Math.max(refList.size(), targetList.size());
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for (int i = 0; i < maxSize; i++)
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{
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if (i < refList.size() && i < targetList.size())
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{
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DbProperty refIndexedProp = new DbProperty(refProp.getDbObject(), refProp.getPropertyName(), i);
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DbProperty targetIndexedProp = new DbProperty(targetProp.getDbObject(), targetProp.getPropertyName(), i);
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if (refList.get(i).equals(targetList.get(i)))
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{
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differences.add(Where.IN_BOTH_NO_DIFFERENCE, refIndexedProp, targetIndexedProp);
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}
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else
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{
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differences.add(Where.IN_BOTH_BUT_DIFFERENCE, refIndexedProp, targetIndexedProp);
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}
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}
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else if (i < refList.size())
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{
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DbProperty indexedProp = new DbProperty(refProp.getDbObject(), refProp.getPropertyName(), i);
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differences.add(Where.ONLY_IN_REFERENCE, indexedProp, null);
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}
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else
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{
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DbProperty indexedProp = new DbProperty(targetProp.getDbObject(), targetProp.getPropertyName(), i);
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// No equivalent object in the reference collection.
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differences.add(Where.ONLY_IN_TARGET, null, indexedProp);
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}
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}
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}
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/**
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* Ensure the property is carrying a list as its payload. A List is required
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* rather than a Collection as the latter may not be ordered.
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*
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* @param prop
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*/
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private void checkPropertyContainsList(DbProperty prop)
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{
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if (!List.class.isAssignableFrom(prop.getPropertyValue().getClass()))
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{
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throw new IllegalArgumentException("List required, but was " + prop.getPropertyValue().getClass());
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}
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}
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@Override
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public void compareSimpleCollections(DbProperty leftProp,
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DbProperty rightProp, DiffContext ctx)
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{
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// Check whether the leftProperty should be compared to the rightProperty
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DbObject leftDbObject = leftProp.getDbObject();
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if (leftDbObject.hasValidators())
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{
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for (DbValidator validator : leftDbObject.getValidators())
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{
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if (validator.validates(leftProp.getPropertyName()))
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{
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// Don't perform differencing on this property - a validator will handle it.
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return;
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}
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}
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}
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@SuppressWarnings("unchecked")
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Collection<? extends Object> leftCollection = (Collection<? extends Object>) leftProp.getPropertyValue();
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@SuppressWarnings("unchecked")
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Collection<? extends Object> rightCollection = (Collection<? extends Object>) rightProp.getPropertyValue();
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ArrayList<? extends Object> leftList = new ArrayList<Object>(leftCollection);
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ArrayList<? extends Object> rightList = new ArrayList<Object>(rightCollection);
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Results differences = ctx.getComparisonResults();
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for (int leftIndex = 0; leftIndex < leftList.size(); leftIndex++)
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{
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Object leftObj = leftList.get(leftIndex);
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DbProperty leftIndexedProp = new DbProperty(leftProp.getDbObject(), leftProp.getPropertyName(), leftIndex);
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int rightIndex;
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if ((rightIndex = rightList.indexOf(leftObj)) != -1)
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{
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// The same valued object in the right hand collection as in the left.
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// Note: it isn't possible to determine a result of Where.IN_BOTH_BUT_DIFFERENCE
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// with a 'simple' value — as there is no way of knowing if the term represents the same value
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// (e.g. two strings {red_value, green_value}, are these meant to be the same or different?)
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DbProperty rightIndexedProp = new DbProperty(rightProp.getDbObject(), rightProp.getPropertyName(), rightIndex);
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differences.add(Where.IN_BOTH_NO_DIFFERENCE, leftIndexedProp, rightIndexedProp);
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}
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else
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{
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// No equivalent object in the right hand collection.
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// Using rightIndexedProperty would result in index out of bounds error.
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differences.add(Where.ONLY_IN_REFERENCE, leftIndexedProp, rightProp);
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}
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}
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// Identify objects in the right collection but not the left
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for (int rightIndex = 0; rightIndex < rightList.size(); rightIndex++)
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{
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Object rightObj = rightList.get(rightIndex);
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if (!leftCollection.contains(rightObj))
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{
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DbProperty rightIndexedProp = new DbProperty(rightProp.getDbObject(), rightProp.getPropertyName(), rightIndex);
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// No equivalent object in the left hand collection.
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differences.add(Where.ONLY_IN_TARGET, leftProp, rightIndexedProp);
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}
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}
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}
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@Override
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public void compareCollections(Collection<? extends DbObject> leftCollection,
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Collection<? extends DbObject> rightCollection, DiffContext ctx)
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{
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Results differences = ctx.getComparisonResults();
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for (DbObject leftObj : leftCollection)
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{
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if (leftObj.hasObjectLevelValidator())
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{
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// Don't report differences regarding this object - there is a validator
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// that takes sole responsibility for doing so.
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continue;
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}
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boolean foundMatch = false;
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for (DbObject rootObject : rightCollection)
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{
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List<DbObject> matches = findEquivalentObjects(rootObject, leftObj);
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for (DbObject match : matches)
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{
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// There is an equivalent object in the right hand collection as in the left.
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leftObj.diff(match, ctx);
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}
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if (matches.size() > 0)
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{
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foundMatch = true;
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}
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}
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if (!foundMatch)
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{
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// No equivalent object in the target collection.
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differences.add(Where.ONLY_IN_REFERENCE, new DbProperty(leftObj, null), null);
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}
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}
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// Identify objects in the right collection but not the left
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for (DbObject rightObj : rightCollection)
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{
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if (rightObj.hasObjectLevelValidator())
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{
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// Don't report differences regarding this object - there is a validator
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// that takes sole responsibility for doing so.
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continue;
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}
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boolean foundMatch = false;
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for (DbObject rootObject : leftCollection)
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{
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List<DbObject> matches = findEquivalentObjects(rootObject, rightObj);
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if (matches.size() > 0)
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{
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foundMatch = true;
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break;
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}
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}
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if (!foundMatch)
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{
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// No equivalent object in the left hand collection.
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differences.add(Where.ONLY_IN_TARGET, null, new DbProperty(rightObj, null));
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}
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}
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}
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@Override
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public void compareSimple(DbProperty leftProperty, DbProperty rightProperty, DiffContext ctx)
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{
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// Check whether the leftProperty should be compared to the rightProperty
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DbObject leftDbObject = leftProperty.getDbObject();
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if (leftDbObject.hasValidators())
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{
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for (DbValidator validator : leftDbObject.getValidators())
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{
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if (validator.validates(leftProperty.getPropertyName()))
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{
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// Don't perform differencing on this property - a validator will handle it.
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return;
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}
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}
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}
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Where where = null;
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Object left = leftProperty.getPropertyValue();
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checkNotDbObject(left);
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Object right = rightProperty.getPropertyValue();
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checkNotDbObject(right);
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if (left == right)
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{
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// Same object, or both nulls
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where = Where.IN_BOTH_NO_DIFFERENCE;
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}
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else if (left == null)
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{
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// right can't be null, or left == right would have been true
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where = Where.ONLY_IN_TARGET;
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}
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else if (right == null)
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{
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// left can't be null, or left == right would have been true
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where = Where.ONLY_IN_REFERENCE;
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}
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else
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{
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// neither are null
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boolean objectsAreEqual;
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// Strings are compared case-insensitively, e.g. table names.
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if (left instanceof String && right instanceof String)
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{
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objectsAreEqual = ((String) left).equalsIgnoreCase((String) right);
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}
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else
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{
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objectsAreEqual = left.equals(right);
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}
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if (objectsAreEqual)
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{
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where = Where.IN_BOTH_NO_DIFFERENCE;
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}
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else
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{
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where = Where.IN_BOTH_BUT_DIFFERENCE;
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}
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}
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ctx.getComparisonResults().add(where, leftProperty, rightProperty);
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}
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/**
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* @param obj
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*/
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private void checkNotDbObject(Object obj)
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{
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if (obj != null && DbObject.class.isAssignableFrom(obj.getClass()))
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{
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throw new IllegalArgumentException(
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"Property value is a DbObject - this method shouldn't be used to compare this type: " + obj);
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}
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}
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public static class EquivalentObjectSeeker implements DbObjectVisitor
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{
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private final List<DbObject> matches = new ArrayList<DbObject>();
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private final DbObject objToMatch;
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public EquivalentObjectSeeker(DbObject objToMatch)
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{
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this.objToMatch = objToMatch;
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}
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@Override
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public void visit(DbObject dbObject)
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{
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if (objToMatch.sameAs(dbObject))
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{
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matches.add(dbObject);
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}
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}
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/**
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* @return the matches
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*/
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public List<DbObject> getMatches()
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{
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return this.matches;
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}
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}
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}
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