/** Get a named attribute of the variable; e.g. xxx.yyy */
@Override
public VariableReference getAttribute(String attributeName) throws ScriptException {
// We recognize the __size__ attribute
if (attributeName.equals(ATTRIBUTE_SIZE))
return new VariableInt(configurationNode.getChildCount());
// Also, the __type__ attribute
if (attributeName.equals(ATTRIBUTE_TYPE))
return new VariableString(configurationNode.getType());
// And the __value__ attribute
if (attributeName.equals(ATTRIBUTE_VALUE)) return new ValueReference();
if (attributeName.equals(ATTRIBUTE_DICT)) {
VariableDict dict = new VariableDict();
int i = 0;
while (i < configurationNode.getChildCount()) {
ConfigurationNode child = configurationNode.findChild(i++);
String type = child.getType();
dict.getIndexed(new VariableString(type))
.setReference(new VariableConfigurationNode(child));
}
return dict;
}
if (attributeName.equals(ATTRIBUTE_SCRIPT)
|| attributeName.equals(ATTRIBUTE_STRING)
|| attributeName.equals(ATTRIBUTE_INT)
|| attributeName.equals(ATTRIBUTE_FLOAT)
|| attributeName.equals(ATTRIBUTE_BOOLEAN)) return super.getAttribute(attributeName);
// All others are presumed to be attributes of the configuration node, which can be set or
// cleared.
return new AttributeReference(attributeName);
}
/** Insert an object into this variable at a position. */
@Override
public void insertAt(Variable v, Variable index) throws ScriptException {
if (v == null) throw new ScriptException(composeMessage("Can't insert a null object"));
if (index == null)
configurationNode.addChild(configurationNode.getChildCount(), v.getConfigurationNodeValue());
else {
int indexValue = index.getIntValue();
if (indexValue < 0 || indexValue > configurationNode.getChildCount())
throw new ScriptException(composeMessage("Insert out of bounds: " + indexValue));
configurationNode.addChild(indexValue, v.getConfigurationNodeValue());
}
}
/** Delete an object from this variable at a position. */
@Override
public void removeAt(Variable index) throws ScriptException {
if (index == null) throw new ScriptException(composeMessage("Remove index cannot be null"));
int indexValue = index.getIntValue();
if (indexValue < 0 || indexValue >= configurationNode.getChildCount())
throw new ScriptException(composeMessage("Remove index out of bounds: " + indexValue));
configurationNode.removeChild(indexValue);
}
/** Get an indexed property of the variable */
@Override
public VariableReference getIndexed(Variable index) throws ScriptException {
if (index == null) throw new ScriptException(composeMessage("Subscript cannot be null"));
int indexValue = index.getIntValue();
if (indexValue >= 0 && indexValue < configurationNode.getChildCount())
return new NodeReference(indexValue);
throw new ScriptException(composeMessage("Subscript is out of bounds: " + indexValue));
}
@Override
public VariableReference plus(Variable v) throws ScriptException {
if (v == null) throw new ScriptException(composeMessage("Can't add a null object"));
ConfigurationNode node = v.getConfigurationNodeValue();
ConfigurationNode cn = new ConfigurationNode(configurationNode.getType());
cn.setValue(configurationNode.getValue());
Iterator<String> attIter = configurationNode.getAttributes();
while (attIter.hasNext()) {
String attrName = attIter.next();
String attrValue = configurationNode.getAttributeValue(attrName);
cn.setAttribute(attrName, attrValue);
}
int i = 0;
while (i < configurationNode.getChildCount()) {
ConfigurationNode child = configurationNode.findChild(i++);
cn.addChild(cn.getChildCount(), child);
}
cn.addChild(cn.getChildCount(), node);
return new VariableConfigurationNode(cn);
}
/** Get the variable's script value */
@Override
public String getScriptValue() throws ScriptException {
StringBuilder sb = new StringBuilder();
sb.append("<< ");
sb.append(new VariableString(configurationNode.getType()).getScriptValue());
sb.append(" : ");
String valueField = configurationNode.getValue();
if (valueField == null) valueField = "";
sb.append(new VariableString(valueField).getScriptValue());
sb.append(" : ");
boolean needComma = false;
Iterator<String> iter = configurationNode.getAttributes();
String[] attrs = new String[configurationNode.getAttributeCount()];
int i = 0;
while (iter.hasNext()) {
String attrName = iter.next();
attrs[i++] = attrName;
}
java.util.Arrays.sort(attrs);
i = 0;
while (i < attrs.length) {
String attrName = attrs[i++];
String value = configurationNode.getAttributeValue(attrName);
if (needComma) sb.append(", ");
else needComma = true;
sb.append(new VariableString(attrName).getScriptValue());
sb.append("=");
sb.append(new VariableString(value).getScriptValue());
}
sb.append(" : ");
i = 0;
while (i < configurationNode.getChildCount()) {
ConfigurationNode child = configurationNode.findChild(i);
if (i > 0) sb.append(", ");
sb.append(new VariableConfigurationNode(child).getScriptValue());
i++;
}
sb.append(" >>");
return sb.toString();
}