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de.neuland.jade4j.parser.node.EachNode Maven / Gradle / Ivy
package de.neuland.jade4j.parser.node;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import org.apache.commons.collections.IteratorUtils;
import de.neuland.jade4j.compiler.IndentWriter;
import de.neuland.jade4j.exceptions.ExpressionException;
import de.neuland.jade4j.exceptions.JadeCompilerException;
import de.neuland.jade4j.model.JadeModel;
import de.neuland.jade4j.template.JadeTemplate;
public class EachNode extends Node {
private String key;
private String code;
private Node elseNode;
@Override
public void execute(IndentWriter writer, JadeModel model, JadeTemplate template) throws JadeCompilerException {
Object result;
try {
result = template.getExpressionHandler().evaluateExpression(getCode(), model);
} catch (ExpressionException e) {
throw new JadeCompilerException(this, template.getTemplateLoader(), e);
}
if (result == null) {
throw new JadeCompilerException(this, template.getTemplateLoader(), "[" + code + "] has to be iterable but was null");
}
model.pushScope();
run(writer, model, result, template);
model.popScope();
}
@SuppressWarnings("unchecked")
private void run(IndentWriter writer, JadeModel model, Object result, JadeTemplate template) {
if (result instanceof Iterable) {
runIterator(((Iterable) result).iterator(), model, writer, template);
} else if (result.getClass().isArray()) {
Iterator iterator = IteratorUtils.arrayIterator(result);
runIterator(iterator, model, writer, template);
} else if (result instanceof Map) {
runMap((Map) result, model, writer, template);
}
}
private void runIterator(Iterator iterator, JadeModel model, IndentWriter writer, JadeTemplate template) {
int index = 0;
if (!iterator.hasNext()) {
executeElseNode(model, writer, template);
return;
}
while (iterator.hasNext()) {
model.put(getValue(), iterator.next());
model.put(getKey(), index);
getBlock().execute(writer, model, template);
index++;
}
}
private void runMap(Map result, JadeModel model, IndentWriter writer, JadeTemplate template) {
Set keys = result.keySet();
if (keys.size() == 0) {
executeElseNode(model, writer, template);
return;
}
for (Object key : keys) {
model.put(getValue(), result.get(key));
model.put(getKey(), key);
getBlock().execute(writer, model, template);
}
}
private void executeElseNode(JadeModel model, IndentWriter writer, JadeTemplate template) {
if (elseNode != null) {
elseNode.execute(writer, model, template);
}
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getKey() {
return key == null ? "$index" : key;
}
public void setKey(String key) {
this.key = key;
}
public Node getElseNode() {
return elseNode;
}
public void setElseNode(Node elseNode) {
this.elseNode = elseNode;
}
}
