org.apache.poi.ss.formula.CollaboratingWorkbooksEnvironment Maven / Gradle / Ivy
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package org.apache.poi.ss.formula;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.IdentityHashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
/**
* Manages a collection of {@link WorkbookEvaluator}s, in order to support evaluation of formulas
* across spreadsheets.
*
* For POI internal use only
*
* @author Josh Micich
*/
public final class CollaboratingWorkbooksEnvironment {
public static final class WorkbookNotFoundException extends Exception {
WorkbookNotFoundException(String msg) {
super(msg);
}
}
public static final CollaboratingWorkbooksEnvironment EMPTY = new CollaboratingWorkbooksEnvironment();
private final Map _evaluatorsByName;
private final WorkbookEvaluator[] _evaluators;
private boolean _unhooked;
private CollaboratingWorkbooksEnvironment() {
_evaluatorsByName = Collections.emptyMap();
_evaluators = new WorkbookEvaluator[0];
}
public static void setup(String[] workbookNames, WorkbookEvaluator[] evaluators) {
int nItems = workbookNames.length;
if (evaluators.length != nItems) {
throw new IllegalArgumentException("Number of workbook names is " + nItems
+ " but number of evaluators is " + evaluators.length);
}
if (nItems < 1) {
throw new IllegalArgumentException("Must provide at least one collaborating worbook");
}
new CollaboratingWorkbooksEnvironment(workbookNames, evaluators, nItems);
}
private CollaboratingWorkbooksEnvironment(String[] workbookNames, WorkbookEvaluator[] evaluators, int nItems) {
Map m = new HashMap(nItems * 3 / 2);
IdentityHashMap uniqueEvals = new IdentityHashMap(nItems * 3 / 2);
for(int i=0; i oldEnvs = new HashSet();
for(int i=0; i i = _evaluatorsByName.keySet().iterator();
int count=0;
while(i.hasNext()) {
if (count++>0) {
sb.append(", ");
}
sb.append("'").append(i.next()).append("'");
}
sb.append(")");
}
throw new WorkbookNotFoundException(sb.toString());
}
return result;
}
}