freemarker.core.MiscUtil Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* 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
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package freemarker.core;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
/**
* Utilities that didn't fit elsewhere.
*/
class MiscUtil {
// Can't be instatiated
private MiscUtil() { }
static final String C_FALSE = "false";
static final String C_TRUE = "true";
/**
* Returns the map entries in source code order of the Expression values.
*/
static List/*Map.Entry*/ sortMapOfExpressions(Map/**/ map) {
ArrayList res = new ArrayList(map.entrySet());
Collections.sort(res,
new Comparator() { // for sorting to source code order
public int compare(Object o1, Object o2) {
Map.Entry ent1 = (Map.Entry) o1;
Expression exp1 = (Expression) ent1.getValue();
Map.Entry ent2 = (Map.Entry) o2;
Expression exp2 = (Expression) ent2.getValue();
int res = exp1.beginLine - exp2.beginLine;
if (res != 0) return res;
res = exp1.beginColumn - exp2.beginColumn;
if (res != 0) return res;
if (ent1 == ent2) return 0;
// Should never reach this
return ((String) ent1.getKey()).compareTo((String) ent1.getKey());
}
});
return res;
}
static Expression peelParentheses(Expression exp) {
while (exp instanceof ParentheticalExpression) {
exp = ((ParentheticalExpression) exp).getNestedExpression();
}
return exp;
}
}