/* * Copyright (C) 2009 eXo Platform SAS. * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ package org.xcmis.search.model.constraint; import org.apache.commons.lang.Validate; import org.apache.commons.lang.builder.EqualsBuilder; import org.apache.commons.lang.builder.HashCodeBuilder; import org.xcmis.search.QueryObjectModelVisitor; import org.xcmis.search.VisitException; import org.xcmis.search.Visitors; /** * A two-place logical connective that has the value true if both of its operands are true, otherwise a value of false. * */ public class And extends Constraint { private final Constraint left; private final Constraint right; private final int hc; public And(Constraint left, Constraint right) { Validate.notNull(left, "The left argument may not be null"); Validate.notNull(right, "The right argument may not be null"); this.left = left; this.right = right; this.hc = new HashCodeBuilder().append(left).append(right).toHashCode(); } /** * Get the constraint that is on the left-hand-side of the AND operation. * * @return the left-hand-side constraint */ public final Constraint getLeft() { return left; } /** * Get the constraint that is on the right-hand-side of the AND operation. * * @return the right-hand-side constraint */ public final Constraint getRight() { return right; } /** * {@inheritDoc} * * @see java.lang.Object#toString() */ @Override public String toString() { return Visitors.readable(this); } /** * {@inheritDoc} * * @see java.lang.Object#hashCode() */ @Override public int hashCode() { return hc; } /** * {@inheritDoc} * * @see java.lang.Object#equals(java.lang.Object) */ @Override public boolean equals(Object obj) { if (obj == null) { return false; } if (obj == this) { return true; } if (obj.getClass() != getClass()) { return false; } And rhs = (And)obj; return new EqualsBuilder() .append(left, rhs.left) .append(right, rhs.right) .isEquals(); } /** * @see org.xcmis.search.model.QueryElement#accept(org.xcmis.search.QueryObjectModelVisitor) */ public void accept(QueryObjectModelVisitor visitor) throws VisitException { visitor.visit(this); } }