querqy.model.SubQuery Maven / Gradle / Ivy
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/**
*
*/
package querqy.model;
import java.util.LinkedList;
import java.util.List;
/**
* @author René Kriegler, @renekrie
*
*/
public abstract class SubQuery extends Clause
{
protected final List clauses = new LinkedList<>();
public SubQuery(final P parentQuery, final boolean generated) {
this(parentQuery, Occur.SHOULD, generated);
}
public SubQuery(final P parentQuery, final Occur occur, final boolean generated) {
super(parentQuery, occur, generated);
}
@SuppressWarnings("unchecked")
public List getClauses(final Class type) {
final List result = new LinkedList<>();
for (final C clause: clauses) {
if (type.equals(clause.getClass())) {
result.add((T) clause);
}
}
return result;
}
public void addClause(final C clause) {
if (clause.getParent() != this) {
throw new IllegalArgumentException("This query is not a parent of " + clause);
}
clauses.add(clause);
}
public void removeClause(final C clause) {
if (clause.getParent() != this) {
throw new IllegalArgumentException("This query is not a parent of " + clause);
}
clauses.remove(clause);
}
public abstract void removeClauseAndTraverseTree(final C clause);
public List getClauses() {
return clauses;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((clauses == null) ? 0 : clauses.hashCode());
return result;
}
@Override
public boolean equals(final Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
final SubQuery other = (SubQuery) obj;
if (clauses == null) {
if (other.clauses != null)
return false;
} else if (!clauses.equals(other.clauses))
return false;
return true;
}
}