Method addAggr

output/java8/1.4.17/ST.java:299–330

Split aggrName.{propName1,propName2} into list [propName1, propName2] and the aggrName. Spaces are allowed around ','.

(String aggrSpec, Object... values)

     */

    public synchronized ST addAggr(String aggrSpec, Object... values) {
        int dot = aggrSpec.indexOf(".{");
        if ( values==null || values.length==0 ) {
            throw new IllegalArgumentException("missing values for aggregate attribute format: "+aggrSpec);
        }

        int finalCurly = aggrSpec.indexOf('}');
        if ( dot<0 || finalCurly<0 ) {
            throw new IllegalArgumentException("invalid aggregate attribute format: "+aggrSpec);
        }

        String aggrName = aggrSpec.substring(0, dot);
        String propString = aggrSpec.substring(dot +2, aggrSpec.length()-1);
        propString = propString.trim();
        String[] propNames = propString.split("\\ *,\\ *");
        if ( propNames==null || propNames.length==0 ) {
            throw new IllegalArgumentException("invalid aggregate attribute format: "+aggrSpec);
        }

        if ( values.length!= propNames.length ) {
            throw new IllegalArgumentException("number of properties and values mismatch for aggregate attribute format: "+aggrSpec);
        }

        int i = 0;
        Aggregate aggr = new Aggregate();
        for (String p : propNames) {
            Object v = values[i++];
            aggr.properties.put(p, v);
        }
        add(aggrName, aggr); // now add as usual
        return this;
    }

    /** Remove an attribute value entirely (can't remove attribute definitions). */