+++ /dev/null
-package org.argeo.eclipse.ui.jcr.lists;
-
-import java.math.BigDecimal;
-import java.util.Calendar;
-
-import javax.jcr.Node;
-import javax.jcr.PropertyType;
-import javax.jcr.RepositoryException;
-import javax.jcr.Value;
-import javax.jcr.ValueFormatException;
-
-import org.argeo.eclipse.ui.EclipseUiException;
-import org.eclipse.jface.viewers.Viewer;
-import org.eclipse.jface.viewers.ViewerComparator;
-
-/**
- * Base comparator to enable ordering on Table or Tree viewer that display Jcr
- * Nodes.
- *
- * Note that the following snippet must be added before setting the comparator
- * to the corresponding control: <code>
- * // IMPORTANT: initialize comparator before setting it
- * JcrColumnDefinition firstCol = colDefs.get(0);
- * comparator.setColumn(firstCol.getPropertyType(),
- * firstCol.getPropertyName());
- * viewer.setComparator(comparator); </code>
- */
-public class NodeViewerComparator extends ViewerComparator {
- private static final long serialVersionUID = -7782916140737279027L;
-
- protected String propertyName;
-
- protected int propertyType;
- public static final int ASCENDING = 0, DESCENDING = 1;
- protected int direction = DESCENDING;
-
- public NodeViewerComparator() {
- }
-
- /**
- * e1 and e2 must both be Jcr nodes.
- *
- * @param viewer
- * @param e1
- * @param e2
- * @return
- */
- @Override
- public int compare(Viewer viewer, Object e1, Object e2) {
- int rc = 0;
- long lc = 0;
-
- try {
- Node n1 = (Node) e1;
- Node n2 = (Node) e2;
-
- Value v1 = null;
- Value v2 = null;
- if (n1.hasProperty(propertyName))
- v1 = n1.getProperty(propertyName).getValue();
- if (n2.hasProperty(propertyName))
- v2 = n2.getProperty(propertyName).getValue();
-
- if (v2 == null && v1 == null)
- return 0;
- else if (v2 == null)
- return -1;
- else if (v1 == null)
- return 1;
-
- switch (propertyType) {
- case PropertyType.STRING:
- rc = v1.getString().compareTo(v2.getString());
- break;
- case PropertyType.BOOLEAN:
- boolean b1 = v1.getBoolean();
- boolean b2 = v2.getBoolean();
- if (b1 == b2)
- rc = 0;
- else
- // we assume true is greater than false
- rc = b1 ? 1 : -1;
- break;
- case PropertyType.DATE:
- Calendar c1 = v1.getDate();
- Calendar c2 = v2.getDate();
- if (c1 == null || c2 == null)
- // log.trace("undefined date");
- ;
- lc = c1.getTimeInMillis() - c2.getTimeInMillis();
- if (lc < Integer.MIN_VALUE)
- rc = -1;
- else if (lc > Integer.MAX_VALUE)
- rc = 1;
- else
- rc = (int) lc;
- break;
- case PropertyType.LONG:
- long l1;
- long l2;
- // TODO Sometimes an empty string is set instead of a long
- try {
- l1 = v1.getLong();
- } catch (ValueFormatException ve) {
- l1 = 0;
- }
- try {
- l2 = v2.getLong();
- } catch (ValueFormatException ve) {
- l2 = 0;
- }
-
- lc = l1 - l2;
- if (lc < Integer.MIN_VALUE)
- rc = -1;
- else if (lc > Integer.MAX_VALUE)
- rc = 1;
- else
- rc = (int) lc;
- break;
- case PropertyType.DECIMAL:
- BigDecimal bd1 = v1.getDecimal();
- BigDecimal bd2 = v2.getDecimal();
- rc = bd1.compareTo(bd2);
- break;
- case PropertyType.DOUBLE:
- Double d1 = v1.getDouble();
- Double d2 = v2.getDouble();
- rc = d1.compareTo(d2);
- break;
- default:
- throw new EclipseUiException(
- "Unimplemented comparaison for PropertyType "
- + propertyType);
- }
- // If descending order, flip the direction
- if (direction == DESCENDING) {
- rc = -rc;
- }
-
- } catch (RepositoryException re) {
- throw new EclipseUiException("Unexpected error "
- + "while comparing nodes", re);
- }
- return rc;
- }
-
- /**
- * @param propertyType
- * Corresponding JCR type
- * @param propertyName
- * name of the property to use.
- */
- public void setColumn(int propertyType, String propertyName) {
- if (this.propertyName != null && this.propertyName.equals(propertyName)) {
- // Same column as last sort; toggle the direction
- direction = 1 - direction;
- } else {
- // New column; do an ascending sort
- this.propertyType = propertyType;
- this.propertyName = propertyName;
- direction = ASCENDING;
- }
- }
-
- // Getters and setters
- protected String getPropertyName() {
- return propertyName;
- }
-
- protected void setPropertyName(String propertyName) {
- this.propertyName = propertyName;
- }
-
- protected int getPropertyType() {
- return propertyType;
- }
-
- protected void setPropertyType(int propertyType) {
- this.propertyType = propertyType;
- }
-
- protected int getDirection() {
- return direction;
- }
-
- protected void setDirection(int direction) {
- this.direction = direction;
- }
-}
projects / lgpl / argeo-commons.git / blobdiff