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AbstractSchema.java
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package sqlancer.common.schema;
import java.util.Collections;
import java.util.List;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import sqlancer.GlobalState;
import sqlancer.IgnoreMeException;
import sqlancer.Randomly;
public class AbstractSchema<G extends GlobalState<?, ?, ?>, A extends AbstractTable<?, ?, G>> {
private final List<A> databaseTables;
public AbstractSchema(List<A> databaseTables) {
this.databaseTables = Collections.unmodifiableList(databaseTables);
}
@Override
public String toString() {
StringBuffer sb = new StringBuffer();
for (A t : getDatabaseTables()) {
sb.append(t);
sb.append("\n");
}
return sb.toString();
}
public A getRandomTable() {
return Randomly.fromList(getDatabaseTables());
}
public A getRandomTableOrBailout() {
if (databaseTables.isEmpty()) {
throw new IgnoreMeException();
} else {
return Randomly.fromList(getDatabaseTables());
}
}
public A getRandomTable(Predicate<A> predicate) {
return Randomly.fromList(getDatabaseTables().stream().filter(predicate).collect(Collectors.toList()));
}
public A getRandomTableOrBailout(Function<A, Boolean> f) {
List<A> relevantTables = databaseTables.stream().filter(t -> f.apply(t)).collect(Collectors.toList());
if (relevantTables.isEmpty()) {
throw new IgnoreMeException();
}
return Randomly.fromList(relevantTables);
}
public List<A> getDatabaseTables() {
return databaseTables;
}
public List<A> getTables(Predicate<A> predicate) {
return databaseTables.stream().filter(predicate).collect(Collectors.toList());
}
public List<A> getDatabaseTablesRandomSubsetNotEmpty() {
return Randomly.nonEmptySubset(databaseTables);
}
public A getDatabaseTable(String name) {
return databaseTables.stream().filter(t -> t.getName().equals(name)).findAny().orElse(null);
}
public List<A> getViews() {
return databaseTables.stream().filter(t -> t.isView()).collect(Collectors.toList());
}
public List<A> getDatabaseTablesWithoutViews() {
return databaseTables.stream().filter(t -> !t.isView()).collect(Collectors.toList());
}
public A getRandomViewOrBailout() {
if (getViews().isEmpty()) {
throw new IgnoreMeException();
} else {
return Randomly.fromList(getViews());
}
}
public A getRandomTableNoViewOrBailout() {
List<A> databaseTablesWithoutViews = getDatabaseTablesWithoutViews();
if (databaseTablesWithoutViews.isEmpty()) {
throw new IgnoreMeException();
}
return Randomly.fromList(databaseTablesWithoutViews);
}
public String getFreeIndexName() {
int i = 0;
if (Randomly.getBooleanWithRatherLowProbability()) {
i = (int) Randomly.getNotCachedInteger(0, 100);
}
do {
String indexName = String.format("i%d", i++);
boolean indexNameFound = false;
for (A table : databaseTables) {
if (table.getIndexes().stream().anyMatch(ind -> ind.getIndexName().contentEquals(indexName))) {
indexNameFound = true;
break;
}
}
if (!indexNameFound) {
return indexName;
}
} while (true);
}
public String getFreeTableName() {
int i = 0;
if (Randomly.getBooleanWithRatherLowProbability()) {
i = (int) Randomly.getNotCachedInteger(0, 100);
}
do {
String tableName = String.format("t%d", i++);
if (databaseTables.stream().noneMatch(t -> t.getName().equalsIgnoreCase(tableName))) {
return tableName;
}
} while (true);
}
public String getFreeViewName() {
int i = 0;
if (Randomly.getBooleanWithRatherLowProbability()) {
i = (int) Randomly.getNotCachedInteger(0, 100);
}
do {
String tableName = String.format("v%d", i++);
if (databaseTables.stream().noneMatch(t -> t.getName().contentEquals(tableName))) {
return tableName;
}
} while (true);
}
public boolean containsTableWithZeroRows(G globalState) {
return databaseTables.stream().anyMatch(t -> t.getNrRows(globalState) == 0);
}
}