/*
* ====================================================================
*
* The ObjectStyle Group Software License, Version 1.0
*
* Copyright (c) 2005 The ObjectStyle Group and individual authors of the
* software. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. The end-user documentation included with the redistribution, if any, must
* include the following acknowlegement: "This product includes software
* developed by the ObjectStyle Group (http://objectstyle.org/)." Alternately,
* this acknowlegement may appear in the software itself, if and wherever such
* third-party acknowlegements normally appear.
*
* 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse or
* promote products derived from this software without prior written permission.
* For written permission, please contact andrus@objectstyle.org.
*
* 5. Products derived from this software may not be called "ObjectStyle" nor
* may "ObjectStyle" appear in their names without prior written permission of
* the ObjectStyle Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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
* OBJECTSTYLE GROUP OR ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many individuals on
* behalf of the ObjectStyle Group. For more information on the ObjectStyle
* Group, please see <http://objectstyle.org/>.
*
*/
package org.objectstyle.wolips.ruleeditor.model;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
/**
* @author uli
* @author <a href="mailto:frederico@moleque.com.br">Frederico Lellis</a>
* @author <a href="mailto:georg@moleque.com.br">Georg von Bülow</a>
* @author <a href="mailto:hprange@moleque.com.br">Henrique Prange</a>
*/
public class LeftHandSide extends AbstractQualifierElement {
public static final String EMPTY_LHS_VALUE = "*true*";
/**
* The constructor is protected because users shouldn't create
* <code>LeftHandSide</code> objects by themselves.
*/
protected LeftHandSide() {
super(Collections.EMPTY_MAP);
}
/**
* The constructor is protected because users shouldn't create
* <code>LeftHandSide</code> objects by themselves.
*
* @param lhsProperties
* A map describing the <code>LeftHandSide</code> object to be
* created
*/
protected LeftHandSide(final Map<String, Object> lhsProperties) {
super(lhsProperties);
}
protected boolean isEmpty() {
return getAssignmentClassName() == null && getKey() == null && getValue() == null && getSelectorName() == null && getQualifiers() == null && getQualifier() == null;
}
public void setConditions(final String conditions) {
String oldValue = toString();
LeftHandSideParser parser = new LeftHandSideParser();
Map<String, Object> properties = parser.parse(conditions);
setAssignmentClassName((String) properties.get(CLASS_KEY));
setKey((String) properties.get(KEY_KEY));
setValue(properties.get(VALUE_KEY));
setSelectorName((String) properties.get(SELECTOR_NAME_KEY));
setQualifiers((Collection<QualifierElement>) properties.get(QUALIFIERS_KEY));
firePropertyChange("LEFT_HAND_SIDE", oldValue, toString());
}
/*
* (non-Javadoc)
*
* @see org.objectstyle.wolips.ruleeditor.model.AbstractQualifierElement#toMap()
*/
@Override
public Map<String, Object> toMap() {
if (isEmpty()) {
return null;
}
return super.toMap();
}
/**
* Returns the string representation of this <code>LeftHandSide</code>
* object.
* <p>
* If the conditions property is empty, returns the "*true*" string.
* <p>
* If the conditions property contains nested qualifiers, returns the
* qualifiers separated by parenthesis. i.e. (task = 'edit' and (entity.name =
* 'MyEntity' or entity.name = 'MyOtherEntity')).
*
* @see java.lang.Object#toString()
* @return Returns the <code>String</code> representation of this object
*/
@Override
public String toString() {
if (isEmpty()) {
return EMPTY_LHS_VALUE;
}
StringBuffer buffer = new StringBuffer();
if (getQualifiers() != null || getQualifier() != null) {
appendToDisplayStringBuffer(buffer);
} else {
buffer.append(getKey());
buffer.append(" ");
Selector selector = Selector.forName(getSelectorName());
buffer.append(selector.getOperator());
buffer.append(" ");
buffer.append(getValue());
}
return buffer.toString();
}
}