/**
* Copyright (c) 2013, Institute of Information Systems (Sven Groppe and contributors of LUPOSDATE), University of Luebeck
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution.
* - Neither the name of the University of Luebeck nor the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package lupos.rif.model;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import lupos.datastructures.bindings.Bindings;
import lupos.datastructures.items.Item;
import lupos.datastructures.items.literal.Literal;
import lupos.rdf.Prefix;
import lupos.rif.IExpression;
import lupos.rif.IRuleVisitor;
import lupos.rif.RIFException;
import lupos.rif.visitor.ReplaceVarsVisitor;
import com.google.common.collect.Multimap;
public class RuleList extends AbstractRuleNode implements IExpression, Item {
private final ArrayList<IExpression> items = new ArrayList<IExpression>();
public boolean isOpen = false;
public void addItem(final IExpression expr) {
if (!(expr instanceof AbstractExpressionContainer))
items.add(expr);
else
throw new RIFException("And() and Or() forbidden in Lists!");
}
public ArrayList<IExpression> getItems() {
return items;
}
@Override
public boolean equals(Object obj) {
if (obj != null && obj instanceof RuleList) {
final RuleList list = (RuleList) obj;
if (list.isOpen != isOpen)
return false;
if (list.getItems().size() != getItems().size())
return false;
for (int i = 0; i < getItems().size(); i++)
if (!getItems().get(i).equals(list.getItems().get(i)))
return false;
return true;
} else
return false;
}
@Override
public int hashCode() {
return toString().hashCode();
}
public String getLabel() {
return toString();
}
public <R, A> R accept(IRuleVisitor<R, A> visitor, A arg) throws RIFException {
return visitor.visit(this, arg);
}
public boolean containsOnlyVariables() {
for (IExpression expr : items)
if (!expr.containsOnlyVariables())
return false;
return true;
}
public Set<RuleVariable> getVariables() {
final Set<RuleVariable> vars = new HashSet<RuleVariable>();
for (IExpression expr : items)
vars.addAll(expr.getVariables());
return vars;
}
public List<Uniterm> getPredicates() {
final List<Uniterm> vars = new ArrayList<Uniterm>();
for (IExpression expr : items)
vars.addAll(expr.getPredicates());
return vars;
}
public Object evaluate(Bindings binding) {
return evaluate(binding, null);
}
public Object evaluate(Bindings binding, Object optionalResult) {
return evaluate(binding, optionalResult, null);
}
public Object evaluate(Bindings binding, Object result, Multimap<IExpression, IExpression> equalities) {
ReplaceVarsVisitor replace = new ReplaceVarsVisitor();
replace.bindings = binding;
return accept(replace, null);
}
public boolean isBound(RuleVariable var, Collection<RuleVariable> boundVars) {
for (IExpression expr : items)
if (expr instanceof RuleVariable && !boundVars.contains(var)) {
boundVars.add(var);
return true;
} else if (expr.isBound(var, boundVars))
return true;
return false;
}
public boolean isPossibleAssignment() {
return false;
}
@Override
public String toString() {
final StringBuilder str = new StringBuilder("List(");
for (IExpression expr : items) {
if (isOpen && items.indexOf(expr) == items.size() - 1)
str.append("| ");
str.append(expr.toString()).append(" ");
}
return str.append(")").toString();
}
public String toString(Prefix prefixInstance) {
final StringBuilder str = new StringBuilder("List(");
for (IExpression expr : items) {
if (isOpen && items.indexOf(expr) == items.size() - 1)
str.append("| ");
str.append(expr.toString(prefixInstance)).append(" ");
}
return str.append(")").toString();
}
public boolean isVariable() {
return false;
}
public Literal getLiteral(Bindings b) {
return null;
}
public String getName() {
return toString();
}
}