Revision 42192 trunk/org.gvsig.desktop/org.gvsig.desktop.compat.cdc/org.gvsig.fmap.mapcontext/org.gvsig.fmap.mapcontext.api/src/main/java/org/gvsig/fmap/mapcontext/ExtentHistory.java
| ExtentHistory.java | ||
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import org.gvsig.tools.persistence.exception.PersistenceException; |
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import org.gvsig.tools.util.Callable; |
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/** |
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* <p> |
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* <code>ExtentHistory</code> is designed for managing a history of extents. |
| ... | ... | |
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*/ |
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public class ExtentHistory implements Persistent {
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private static final String FIELD_CURRENT_EXTENT = "current"; |
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private static final String FIELD_NUM_PREVIOUS = "num"; |
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private static final String FIELD_NUM_NEXT = "numnext"; |
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private static final String FIELD_NUM_RECORDS = "numrec"; |
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private static final String FIELD_PREVIOUS_EXTENTS = "extents"; |
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private static final String FIELD_NEXT_EXTENTS = "extentsNext"; |
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/** |
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* <p> |
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* Maximum number of extents that can store. |
| ... | ... | |
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/** |
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* <p> |
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* Array with the extents. |
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* Array with the previous extents.
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* </p> |
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* |
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* @see #hasPrevious() |
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* @see #put(Rectangle2D) |
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* @see #get() |
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* @see #removePrev()
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* @see #getPrev()
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* @see #popPrev()
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*/ |
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private Rectangle2D[] extents; |
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private Rectangle2D[] extentsPrev;
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/** |
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* <p> |
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* Array with the next extents. |
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* </p> |
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* |
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* @see #hasNext() |
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* @see #putNext(Rectangle2D) |
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* @see #getNext() |
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* @see #popNext() |
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*/ |
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private Rectangle2D[] extentsNext; |
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/** |
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* <p> |
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* The current extent of the viewport. |
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* </p> |
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*/ |
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private Rectangle2D currentExtent; |
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/** |
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* <p> |
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* Number of previous extents stored. |
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* </p> |
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* |
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* @see #hasPrevious() |
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* @see #put(Rectangle2D) |
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* @see #get() |
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* @see #removePrev()
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* @see #getPrev()
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* @see #popPrev()
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*/ |
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private int num = 0; |
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private int numPrev = 0;
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/** |
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* <p> |
| ... | ... | |
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* @see #hasNext() |
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* @see #putNext(Rectangle2D) |
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* @see #getNext() |
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* @see #removeNext()
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* @see #popNext()
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*/ |
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private int numNext = 0; |
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|
| ... | ... | |
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*/ |
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public ExtentHistory(int numEntries) {
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NUMREC = numEntries; |
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extents = new Rectangle2D[NUMREC]; |
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extentsPrev = new Rectangle2D[NUMREC];
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extentsNext = new Rectangle2D[NUMREC]; |
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} |
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|
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* </p> |
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* |
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* @param ext the new extent |
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* @see #get() |
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* @see #hasPrevious() |
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*/ |
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public void put(Rectangle2D ext) {
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if ((ext != null) && ((num < 1) || (ext != extents[num - 1]))) {
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if (num < (NUMREC)) {
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extents[num] = ext; |
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num = num + 1; |
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} |
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else {
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for (int i = 0; i < (NUMREC - 1); i++) {
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extents[i] = extents[i + 1]; |
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} |
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extents[num - 1] = ext; |
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} |
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// Si al cargar de la persistencia currentExtent es null ViewPort nos dar? su extent |
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if(currentExtent == null) {
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this.currentExtent = ext; |
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return; |
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} |
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} |
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if ( !ext.equals(getPrev()) && !ext.equals(getNext()) ) {
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clearNumNext(); |
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} |
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/** |
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* <p> |
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* Appends the specified extent at the end of the array of next zooms. |
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* </p> |
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* |
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* @param ext the new extent |
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* @see #getNext() |
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* @see #hasNext() |
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*/ |
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public void putNext(Rectangle2D ext) {
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if ((ext != null) && ((numNext < 1) || (ext != extentsNext[numNext - 1]))) {
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if (numNext < (NUMREC)) {
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extentsNext[numNext] = ext; |
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numNext++; |
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} |
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else {
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for (int i = 0; i < (NUMREC - 1); i++) {
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extentsNext[i] = extentsNext[i + 1]; |
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} |
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extentsNext[numNext - 1] = ext; |
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} |
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} |
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pushPrevious(currentExtent); |
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this.currentExtent = ext; |
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} |
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/** |
| ... | ... | |
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* |
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* @return <code>true</code> if there are previous extents registered; |
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* <code>false</code> otherwise |
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* @see #put(Rectangle2D) |
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* @see #removePrev() |
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* @see #get() |
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*/ |
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public boolean hasPrevious() {
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return num > 0; |
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return numPrev > 0;
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} |
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/** |
| ... | ... | |
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* |
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* @return <code>true</code> if there are next extents registered; |
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* <code>false</code> otherwise |
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* @see #putNext(Rectangle2D) |
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* @see #removeNext() |
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* @see #getNext() |
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*/ |
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public boolean hasNext() {
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return numNext > 0; |
| ... | ... | |
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* </p> |
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* |
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* @return the last previous extent in the history |
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* @see #put(Rectangle2D) |
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* @see #getXMLEntity() |
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*/ |
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public Rectangle2D get() {
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if (num <= 0) {
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public Rectangle2D getPrev() {
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if (numPrev <= 0) {
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return null; |
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} |
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Rectangle2D ext = extents[num - 1];
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Rectangle2D ext = extentsPrev[numPrev - 1];
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return ext; |
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} |
| ... | ... | |
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* </p> |
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* |
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* @return the last next extent in the history |
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* @see #putNext(Rectangle2D) |
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* @see #getXMLEntity() |
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*/ |
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public Rectangle2D getNext() {
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if (numNext <= 0) {
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| ... | ... | |
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} |
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Rectangle2D ext = extentsNext[numNext - 1]; |
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return ext; |
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} |
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|
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* </p> |
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* |
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* @return last previous extent in the history |
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* @see #hasPrevious() |
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*/ |
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public Rectangle2D removePrev() {
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if (num <= 0) {
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private Rectangle2D popPrev() {
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if (numPrev <= 0) {
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return null; |
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} |
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Rectangle2D ext = extents[--num];
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Rectangle2D ext = extentsPrev[--numPrev];
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return ext; |
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} |
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|
| ... | ... | |
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* </p> |
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* |
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* @return last next extent in the history |
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* @see #hasNext() |
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*/ |
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public Rectangle2D removeNext() {
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private Rectangle2D popNext() {
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if (numNext <= 0) {
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return null; |
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} |
| ... | ... | |
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/** |
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* <p> |
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* Sets to zero the number of previous extents from the history. |
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* </p> |
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*/ |
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private void clearNumPrev() {
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numPrev = 0; |
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} |
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|
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/** |
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* <p> |
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* Sets to zero the number of next extents from the history. |
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* </p> |
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* |
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* @see #getNext() |
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* @see #hasNext() |
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*/ |
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public void clear() {
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private void clearNumNext() {
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numNext = 0; |
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} |
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/** |
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* <p> |
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* Adds the current extent to the next extents history and sets the last |
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* previous extent as the new current extent. |
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* </p> |
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* |
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* @return the last previous extent as the new current extent |
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*/ |
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public Rectangle2D setPreviousExtent() {
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if (currentExtent != null) {
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pushNext(currentExtent); |
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} |
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currentExtent = popPrev(); |
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return currentExtent; |
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} |
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private void pushNext(Rectangle2D ext) {
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if (numNext < (NUMREC)) {
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extentsNext[numNext] = ext; |
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numNext = numNext + 1; |
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} |
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else {
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for (int i = 0; i < (NUMREC - 1); i++) {
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extentsNext[i] = extentsNext[i + 1]; |
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} |
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extentsNext[numNext - 1] = ext; |
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} |
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} |
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|
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/** |
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* <p> |
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* Adds the current extent to the previous extents history and sets the last |
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* next extent as the new current extent. |
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* </p> |
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* |
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* @return the last next extent as the new current extent |
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*/ |
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public Rectangle2D setNextExtent() {
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if (currentExtent != null) {
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pushPrevious(currentExtent); |
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} |
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currentExtent = popNext(); |
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return currentExtent; |
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} |
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private void pushPrevious(Rectangle2D ext) {
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if (numPrev < (NUMREC)) {
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extentsPrev[numPrev] = ext; |
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numPrev++; |
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} else {
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for (int i = 0; i < (NUMREC - 1); i++) {
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extentsPrev[i] = extentsPrev[i + 1]; |
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} |
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extentsPrev[numPrev - 1] = ext; |
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} |
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} |
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|
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public Rectangle2D getCurrent() {
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return currentExtent; |
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} |
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|
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public void loadFromState(PersistentState state) throws PersistenceException {
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num = state.getInt("num");
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NUMREC = state.getInt("numrec");
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extents = (Rectangle2D[]) state.getArray("extents", Rectangle2D.class);
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extentsNext = (Rectangle2D[]) state.getArray("extentsNext",
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Rectangle2D.class); |
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if (state.hasValue("num")) {
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numPrev = state.getInt("num");
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} |
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else {
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clearNumPrev(); |
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} |
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if (state.hasValue("numnext")) {
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numNext = state.getInt("numnext");
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} |
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else {
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clearNumNext(); |
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} |
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if (state.hasValue("numrec")) {
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NUMREC = state.getInt("numrec");
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} |
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else {
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NUMREC = 10; |
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} |
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|
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if (state.hasValue("extents")) {
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extentsPrev = (Rectangle2D[]) state |
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.getArray("extents", Rectangle2D.class);
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} |
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else {
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extentsPrev = new Rectangle2D[NUMREC]; |
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clearNumPrev(); |
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} |
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if (state.hasValue("extentsNext")) {
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extentsNext = (Rectangle2D[]) state.getArray("extentsNext",
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Rectangle2D.class); |
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} |
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else {
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extentsNext = new Rectangle2D[NUMREC]; |
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clearNumNext(); |
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} |
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|
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if (state.hasValue("current")) {
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currentExtent = (Rectangle2D) state.get("current");
|
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} |
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else {
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currentExtent = null; |
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} |
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} |
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|
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/** |
| ... | ... | |
| 303 | 401 |
*/ |
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public void saveToState(PersistentState state) throws PersistenceException {
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state.set("num", num);
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state.set("numrec", NUMREC);
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state.set("extents", extents);
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state.set("extentsNext", extentsNext);
|
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state.set(FIELD_NUM_PREVIOUS, numPrev); |
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state.set(FIELD_NUM_NEXT, numNext); |
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state.set(FIELD_NUM_RECORDS, NUMREC); |
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state.set(FIELD_PREVIOUS_EXTENTS, extentsPrev); |
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state.set(FIELD_NEXT_EXTENTS, extentsNext); |
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state.set(FIELD_CURRENT_EXTENT, currentExtent); |
|
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} |
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|
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public static class RegisterPersistence implements Callable {
|
| ... | ... | |
| 315 | 415 |
PersistenceManager manager = ToolsLocator.getPersistenceManager(); |
| 316 | 416 |
DynStruct definition = manager.addDefinition(ExtentHistory.class, |
| 317 | 417 |
"ExtentHistory", "ExtentHistory Persistence definition", null, null); |
| 318 |
definition.addDynFieldInt("num").setMandatory(true);
|
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definition.addDynFieldInt("numrec").setMandatory(true);
|
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definition.addDynFieldArray("extents").setClassOfItems(Rectangle2D.class)
|
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definition.addDynFieldInt(FIELD_NUM_PREVIOUS).setMandatory(true); |
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definition.addDynFieldInt(FIELD_NUM_NEXT).setMandatory(true); |
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definition.addDynFieldInt(FIELD_NUM_RECORDS).setMandatory(true); |
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definition.addDynFieldArray(FIELD_PREVIOUS_EXTENTS).setClassOfItems(Rectangle2D.class) |
|
| 321 | 422 |
.setMandatory(true); |
| 322 |
definition.addDynFieldArray("extentsNext")
|
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definition.addDynFieldArray(FIELD_NEXT_EXTENTS)
|
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| 323 | 424 |
.setClassOfItems(Rectangle2D.class).setMandatory(true); |
| 425 |
definition.addDynFieldObject(FIELD_CURRENT_EXTENT) |
|
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.setClassOfValue(Rectangle2D.class).setMandatory(false); |
|
| 427 |
|
|
| 324 | 428 |
return Boolean.TRUE; |
| 325 | 429 |
} |
| 326 | 430 |
} |
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