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12022366
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2012-08-18T21:21:11.917
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You can do this with a custom uberspector. This lets you customize how Velocity interprets gets/sets/iterators. I did the exact same thing recently for jsonlib. Here's my uberspector. <pre><code>package util; import java.util.Iterator; import net.sf.json.JSONArray; import org.apache.velocity.util.introspection.Info; import org.apache.velocity.util.introspection.SecureUberspector; /** * Customized Velocity introspector. Used so that FML can iterate through JSON arrays. */ public class CustomUberspector extends SecureUberspector { @Override @SuppressWarnings("rawtypes") public Iterator getIterator(Object obj, Info i) throws Exception { if (obj instanceof JSONArray) { return new JsonArrayIterator((JSONArray) obj); } else { return super.getIterator(obj, i); } } } </code></pre> JsonArrayIterator is just a simple iterator through the array. if you are using a different JSON library, just customize this class. <pre><code>package util; import java.util.Iterator; import net.sf.json.JSONArray; import net.sf.json.JSONException; public class JsonArrayIterator implements Iterator<Object> { private final JSONArray array; private int nextIndex; private final int length; public JsonArrayIterator(JSONArray array) { this.array = array; nextIndex = 0; length = array.size(); } @Override public boolean hasNext() { return nextIndex < length; } @Override public Object next() { nextIndex++; try { return array.get(nextIndex - 1); } catch (JSONException e) { throw new IllegalStateException(e); } } @Override public void remove() { throw new UnsupportedOperationException(); } } </code></pre> The final step is to specify the uberspector in your velocity properties. <pre><code>runtime.introspector.uberspect=util.CustomUberspector </code></pre>
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1. POIterate JSONArray in Velocity Template
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1. USWill Glass
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1. POIterate JSONArray in Velocity Template
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