|
1 package JSci.mathml;
2
3 import org.w3c.dom.*;
4 import org.w3c.dom.mathml.*;
5 import org.apache.xerces.dom.*;
6
7
12 public class MathMLMatrixElementImpl extends MathMLElementImpl implements MathMLMatrixElement {
13
16 public MathMLMatrixElementImpl(MathMLDocumentImpl owner, String  qualifiedName) {
17 super(owner, qualifiedName);
18 }
19
20 public int getNrows() {
21 return getRowsGetLength();
22 }
23 public int getNcols() {
24 return getRow(1).getNEntries();
25 }
26
27 public MathMLNodeList getRows() {
28 return new MathMLNodeList() {
29 public int getLength() {
30 return getRowsGetLength();
31 }
32 public Node item(int index) {
33 return getRowsItem(index);
34 }
35 };
36 }
37
38 public MathMLMatrixrowElement getRow(int index) throws DOMException {
39 Node row = getRowsItem(index-1);
40 if (row == null) {
41 throw new DOMException(DOMException.INDEX_SIZE_ERR, "Index out of bounds");
42 }
43 return (MathMLMatrixrowElement) row;
44 }
45 public MathMLMatrixrowElement setRow(MathMLMatrixrowElement newRow, int index) throws DOMException {
46 final int rowsLength = getRowsGetLength();
47
48 if ((index < 1) || (index > rowsLength+1)) {
49 throw new DOMException(DOMException.INDEX_SIZE_ERR, "Index out of bounds");
50 }
51 if (index == rowsLength+1) {
52 return (MathMLMatrixrowElement) appendChild(newRow);
53 } else {
54 return (MathMLMatrixrowElement) replaceChild(newRow, getRowsItem(index-1));
55 }
56 }
57 public MathMLMatrixrowElement insertRow(MathMLMatrixrowElement newRow, int index) throws DOMException {
58 final int rowsLength = getRowsGetLength();
59
60 if ((index < 0) || (index > rowsLength+1)) {
61 throw new DOMException(DOMException.INDEX_SIZE_ERR, "Index out of bounds");
62 }
63 if ((index == 0) || (index == rowsLength+1)) {
64 return (MathMLMatrixrowElement) appendChild(newRow);
65 } else {
66 return (MathMLMatrixrowElement) insertBefore(newRow, getRowsItem(index-1));
67 }
68 }
69 public MathMLMatrixrowElement removeRow(int index) throws DOMException {
70 Node row = getRowsItem(index-1);
71 if (row == null) {
72 throw new DOMException(DOMException.INDEX_SIZE_ERR, "Index out of bounds");
73 }
74 return (MathMLMatrixrowElement) removeChild(row);
75 }
76 public void deleteRow(int index) throws DOMException {
77 removeRow(index);
78 }
79
80 private int getRowsGetLength() {
81 final int length = getLength();
82 int numRows = 0;
83
84 for (int i = 0; i < length; i++) {
85 if (item(i) instanceof MathMLMatrixrowElement) {
86 numRows++;
87 }
88 }
89 return numRows;
90 }
91 private Node getRowsItem(int index) {
92 final int rowsLength = getRowsGetLength();
93
94 if ((index < 0) || (index >= rowsLength))
95 return null;
96
97 Node node = null;
98 int n = -1;
99 for (int i = 0; n < index; i++) {
100 node = item(i);
101 if (node instanceof MathMLMatrixrowElement) {
102 n++;
103 }
104 }
105 return node;
106 }
107 }
108
109 |
Popular Tags |
Java API By Example, From Geeks To Geeks.