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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
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package org.apache.cayenne.exp.parser;
import org.apache.cayenne.exp.Expression;
import org.apache.cayenne.util.ConversionUtil;
/**
* @since 4.0
*/
public class ASTConcat extends ASTFunctionCall {
ASTConcat(int id) {
super(id, "CONCAT");
}
public ASTConcat(Expression... expressions) {
super(ExpressionParserTreeConstants.JJTCONCAT, "CONCAT", (Object[])expressions);
}
@Override
protected int getRequiredChildrenCount() {
return 1;
}
@Override
protected Object evaluateSubNode(Object o, Object[] evaluatedChildren) throws Exception {
StringBuilder sb = new StringBuilder();
sb.append(ConversionUtil.toString(o));
for(int i=1; i<evaluatedChildren.length; i++) {
sb.append(ConversionUtil.toString(evaluatedChildren[i]));
}
return sb.toString();
}
@Override
public Expression shallowCopy() {
return new ASTConcat(id);
}
}