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ALF-10772: schema comparator

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Compares two abstract database schemas.



git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@31312 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Matt Ward
2011-10-18 11:42:57 +00:00
parent 4cde60f0e6
commit 2a5a337b4e
14 changed files with 799 additions and 139 deletions
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214
source/java/org/alfresco/util/schemacomp/SchemaComparatorTest.java
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@@ -19,13 +19,27 @@
package org.alfresco.util.schemacomp;
import static org.junit.Assert.*;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.alfresco.util.schemacomp.Result.Where;
import org.alfresco.util.schemacomp.model.Column;
import org.alfresco.util.schemacomp.model.ForeignKey;
import org.alfresco.util.schemacomp.model.Index;
import org.alfresco.util.schemacomp.model.PrimaryKey;
import org.alfresco.util.schemacomp.model.Schema;
import org.alfresco.util.schemacomp.model.Table;
import org.apache.commons.lang.ArrayUtils;
import org.junit.Before;
import org.junit.Test;
/**
* TODO: comment me!
* Tests for the SchmeaComparator class.
*
* @author Matt Ward
*/
public class SchemaComparatorTest
@@ -37,8 +51,8 @@ public class SchemaComparatorTest
@Before
public void setup()
{
left = new Schema();
right = new Schema();
left = new Schema("left_schema");
right = new Schema("right_schema");
}
@Test
@@ -47,19 +61,183 @@ public class SchemaComparatorTest
}
// @Test
// public void canDetermineSameTables()
// {
// left.put(new Table("alf_node"));
// left.put(new Table("table_in_left"));
// left.put(new Table("in_both_but_different"));
// right.put(new Table("alf_node"));
// // Note this table is in different position in the RHS list.
// Table rightTable = new Table("in_both_but_different");
// right.put(rightTable);
// right.put(new Table("table_in_right"));
//
// comparator = new SchemaComparator(left, right);
// comparator.compare();
// }
@Test
public void canPerformDiff()
{
// Left hand side's database objects.
left.add(new Table("tbl_no_diff", columns("id NUMBER(10)", "nodeRef VARCHAR2(200)", "name VARCHAR2(150)"),
pk("pk_tbl_no_diff", "id"), fkeys(fk("fk_tbl_no_diff", "nodeRef", "node", "nodeRef")),
indexes("idx_node id nodeRef")));
left.add(table("table_in_left"));
left.add(new Table("tbl_has_diff_pk", columns("id NUMBER(10)", "nodeRef VARCHAR2(200)"),
pk("pk_is_diff", "id"), fkeys(), indexes()));
// Right hand side's database objects.
right.add(new Table("tbl_no_diff", columns("id NUMBER(10)", "nodeRef VARCHAR2(200)", "name VARCHAR2(150)"),
pk("pk_tbl_no_diff", "id"), fkeys(fk("fk_tbl_no_diff", "nodeRef", "node", "nodeRef")),
indexes("idx_node id nodeRef")));
right.add(new Table("tbl_has_diff_pk", columns("id NUMBER(10)", "nodeRef VARCHAR2(200)"),
pk("pk_is_diff", "nodeRef"), fkeys(), indexes()));
right.add(table("table_in_right"));
comparator = new SchemaComparator(left, right);
comparator.compare();
dumpDiffs(comparator.getDifferences(), true);
Iterator<Result> it = comparator.getDifferences().iterator();
assertNoDifference("left_schema.tbl_no_diff", "tbl_no_diff", it.next());
assertNoDifference("left_schema.tbl_no_diff.id", "id", it.next());
assertNoDifference("left_schema.tbl_no_diff.id", "NUMBER(10)", it.next());
assertNoDifference("left_schema.tbl_no_diff.id", Boolean.FALSE, it.next()); // nullable
assertNoDifference("left_schema.tbl_no_diff.nodeRef", "nodeRef", it.next());
assertNoDifference("left_schema.tbl_no_diff.nodeRef", "VARCHAR2(200)", it.next());
assertNoDifference("left_schema.tbl_no_diff.nodeRef", Boolean.FALSE, it.next()); // nullable
assertNoDifference("left_schema.tbl_no_diff.name", "name", it.next());
assertNoDifference("left_schema.tbl_no_diff.name", "VARCHAR2(150)", it.next());
assertNoDifference("left_schema.tbl_no_diff.name", Boolean.FALSE, it.next()); // nullable
assertNoDifference("left_schema.tbl_no_diff.pk_tbl_no_diff", "pk_tbl_no_diff", it.next()); // name field
assertNoDifference("left_schema.tbl_no_diff.pk_tbl_no_diff", "id", it.next()); // first (& only) column of list
assertNoDifference("left_schema.tbl_no_diff.fk_tbl_no_diff", "fk_tbl_no_diff", it.next()); // name field
assertNoDifference("left_schema.tbl_no_diff.fk_tbl_no_diff", "nodeRef", it.next()); // localColumn
assertNoDifference("left_schema.tbl_no_diff.fk_tbl_no_diff", "node", it.next()); // targetTable
assertNoDifference("left_schema.tbl_no_diff.fk_tbl_no_diff", "nodeRef", it.next()); // targetColumn
assertNoDifference("left_schema.tbl_no_diff.idx_node", "idx_node", it.next()); // index name
assertNoDifference("left_schema.tbl_no_diff.idx_node", "id", it.next()); // first indexed column
assertNoDifference("left_schema.tbl_no_diff.idx_node", "nodeRef", it.next()); // second indexed column
// TODO: why are diffs for table not flattened out as for index?
assertOnlyInOne("left_schema", Where.ONLY_IN_LEFT, table("table_in_left"), it.next());
assertNoDifference("left_schema.tbl_has_diff_pk", "tbl_has_diff_pk", it.next());
assertNoDifference("left_schema.tbl_has_diff_pk.id", "id", it.next());
assertNoDifference("left_schema.tbl_has_diff_pk.id", "NUMBER(10)", it.next());
assertNoDifference("left_schema.tbl_has_diff_pk.id", Boolean.FALSE, it.next()); // nullable
assertNoDifference("left_schema.tbl_has_diff_pk.nodeRef", "nodeRef", it.next());
assertNoDifference("left_schema.tbl_has_diff_pk.nodeRef", "VARCHAR2(200)", it.next());
assertNoDifference("left_schema.tbl_has_diff_pk.nodeRef", Boolean.FALSE, it.next()); // nullable
assertNoDifference("left_schema.tbl_has_diff_pk.pk_is_diff", "pk_is_diff", it.next()); // name field
// TODO: surely this should be a diff rather than a ONLY_IN_LEFT plus ONLY_IN_RIGHT?
// assertHasDifference("left_schema.tbl_has_diff_pk.pk_is_diff", "id", "nodeRef", it.next()); // first (& only) column of list
assertOnlyInOne("left_schema.tbl_has_diff_pk.pk_is_diff", Where.ONLY_IN_LEFT, "id", it.next()); // first (& only) column of list
// This belong to the pk_is_diff above.
assertOnlyInOne("left_schema.tbl_has_diff_pk.pk_is_diff", Where.ONLY_IN_RIGHT, "nodeRef", it.next()); // first (& only) column of list
// Items that are ONLY_IN_RIGHT always come at the end
assertOnlyInOne("left_schema", Where.ONLY_IN_RIGHT, table("table_in_right"), it.next());
}
/**
* Assert that the result shows the value to have different values in the left and right items.
*/
private void assertHasDifference(String path, Object leftValue, Object rightValue, Result result)
{
assertEquals(Where.IN_BOTH_BUT_DIFFERENCE, result.getWhere());
assertEquals(path, result.getPath());
assertEquals(leftValue, result.getLeft());
assertEquals(rightValue, result.getRight());
}
/**
* Assert that the result shows the value to be present only in either the left or right items.
*/
private void assertOnlyInOne(String path, Where which, Object value, Result result)
{
assertEquals(which, result.getWhere());
assertEquals(path, result.getPath());
if (which == Where.ONLY_IN_LEFT)
{
assertEquals(value, result.getLeft());
assertNull(result.getRight());
}
else if (which == Where.ONLY_IN_RIGHT)
{
assertNull(result.getLeft());
assertEquals(value, result.getRight());
}
else
{
throw new IllegalArgumentException("The 'which' argument should be ONLY_IN_LEFT or ONLY_IN_RIGHT.");
}
}
/**
* Assert that the result shows no differences between the left and right items.
*/
private void assertNoDifference(String path, Object value, Result result)
{
assertEquals(Where.IN_BOTH_NO_DIFFERENCE, result.getWhere());
assertEquals(path, result.getPath());
assertEquals(value, result.getLeft());
assertEquals(value, result.getRight());
}
/**
* @param differences
*/
private void dumpDiffs(Differences differences, boolean showNonDifferences)
{
System.out.println("Differences (" + differences.size() + ")");
for (Result d : differences)
{
if (d.getWhere() != Where.IN_BOTH_NO_DIFFERENCE || showNonDifferences)
{
System.out.println(d);
}
}
}
private Table table(String name)
{
return new Table(name, columns("id NUMBER(10)"), pk("pk_" + name, "id"), fkeys(), indexes());
}
private Collection<Column> columns(String... colDefs)
{
assertTrue("Tables must have columns", colDefs.length > 0);
Column[] columns = new Column[colDefs.length];
for (int i = 0; i < colDefs.length; i++)
{
String[] parts = colDefs[i].split(" ");
columns[i] = new Column(parts[0], parts[1], false);
}
return Arrays.asList(columns);
}
private PrimaryKey pk(String name, String... columnNames)
{
assertTrue("No columns specified", columnNames.length > 0);
PrimaryKey pk = new PrimaryKey();
pk.setName(name);
pk.setColumnNames(Arrays.asList(columnNames));
return pk;
}
private List<ForeignKey> fkeys(ForeignKey... fkeys)
{
return Arrays.asList(fkeys);
}
private ForeignKey fk(String fkName, String localColumn, String targetTable, String targetColumn)
{
return new ForeignKey(fkName, localColumn, targetTable, targetColumn);
}
private Collection<Index> indexes(String... indexDefs)
{
Index[] indexes = new Index[indexDefs.length];
for (int i = 0; i < indexDefs.length; i++)
{
String[] parts = indexDefs[i].split(" ");
String name = parts[0];
String[] columns = (String[]) ArrayUtils.subarray(parts, 1, parts.length);
indexes[i] = new Index(name, Arrays.asList(columns));
}
return Arrays.asList(indexes);
}
}