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1
61
62 package org.jaxen.function.ext;
63
64 import java.util.ArrayList  ;
65 import java.util.Enumeration ;
66 import java.util.Iterator ;
67 import java.util.List ;
68
69 import org.jaxen.Context;
70 import org.jaxen.Function;
71 import org.jaxen.Navigator;
72 import org.jaxen.function.StringFunction;
73
74
78
79 public class MatrixConcatFunction implements Function {
80
81 public Object call(Context context, List args) {
82 if ( args.size() >= 2 ) {
83 return evaluate(args, context.getNavigator());
84 }
85 return null;
86 }
87
88 public static Object evaluate(List list, Navigator nav) {
89 ArrayList matrix = new ArrayList ();
90
91 Iterator argIter = list.iterator();
92
93 while (argIter.hasNext()) {
94 ArrayList v = new ArrayList ();
95 Object obj = argIter.next();
96 if (obj instanceof List ) {
97 List args = (List ) obj;
98 for ( int i = 0, size = args.size(); i < size; i++ ) {
99 v.add( StringFunction.evaluate( args.get(i), nav ) );
100 }
101 }
102 else {
103 v.add( StringFunction.evaluate( obj, nav ) );
104 }
105 matrix.add(v);
106 }
107
108 ArrayList result = new ArrayList ();
109 Enumeration elemList = new MatrixEnum( matrix );
110 while (elemList.hasMoreElements()) {
111 Object obj = elemList.nextElement();
112 if (obj instanceof List ) {
113 StringBuffer text = new StringBuffer (127);
114 List args = (List ) obj;
115 for (Iterator it = args.iterator(); it.hasNext(); ) {
116 text.append(it.next());
117 }
118 result.add( text.toString() );
119 }
120 else {
121 result.add( obj );
122 }
123 }
124 return result;
125 }
126
127 public static class MatrixEnum implements Enumeration {
128 private ArrayList m_source;
129 private int m_maxSize = 0;
130 private int m_currIdx = -1;
131
132 public MatrixEnum (ArrayList _source) {
133 m_source = _source;
134
135 for ( Iterator iter = m_source.iterator(); iter.hasNext(); ) {
136 ArrayList element = (ArrayList ) iter.next();
137 int size = element.size();
138 if (size > m_maxSize) {
139 m_maxSize = size;
140 }
141 }
142 }
143
144 public MatrixEnum (ArrayList _source, int _maxSize) {
145 m_source = _source;
146 m_maxSize = _maxSize;
147 }
148
149 public boolean hasMoreElements() {
150 if ((m_maxSize != 0) && (++m_currIdx < m_maxSize)) {
151 return true;
152 }
153 else {
154 return false;
155 }
156 }
157
158 public Object nextElement() {
159 ArrayList result = new ArrayList ();
160 for ( Iterator iter = m_source.iterator(); iter.hasNext(); ) {
161 ArrayList element = (ArrayList ) iter.next();
162 int size = element.size();
163 if ( m_currIdx < size ) {
164 result.add( element.get( m_currIdx ) );
165 }
166 else {
167 if ( size > 0 ) {
168 result.add( element.get( size - 1 ) );
169 }
170 else {
171 result.add( "" );
173 }
174 }
175 }
176 return result;
177 }
178 }
179 }
180 |
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