/*
* Copyright 2008-2011 the original author or authors.
*
* Licensed 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 com.nominanuda.urispec;
import static com.nominanuda.urispec.Assert.isFalse;
import static com.nominanuda.urispec.Assert.isTrue;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import org.antlr.v4.runtime.Token;
public class AnonExprNode extends AbstractNode implements TemplatingNode, SeqComponent/*BindingTree*/ {
protected List<CharSequenceNode> alts;
protected RegexpMatcher regexpMatcher;
public AnonExprNode(Token payload) {
super(payload);
}
public RegexpMatcher getBindingRegexp() {
return regexpMatcher;
}
public List<String> templateMulti(Object model) {
for(CharSequenceNode seq : alts) {
List<String> tpls = seq.templateMulti(model);
if(tpls != null) {
return tpls;
}
}
return null;
}
public void initNode() {
isFalse(valid);
isTrue(getChildCount() > 0);
if(getChildCount() == 1) {//add empty alternative
addChild(getNodeAdapter().createEmptyCharSequence());
}
alts = new ArrayList<CharSequenceNode>(getChildCount());
for(Object child : getChildren()) {
CharSequenceNode seq = (CharSequenceNode)child;
seq.initNode();
alts.add(seq);
}
regexpMatcher = calcBindingRegexp();
}
protected RegexpMatcher calcBindingRegexp() {
List<String> vars = new LinkedList<String>();
StringBuilder rex = new StringBuilder();
rex.append("(?:");
Iterator<CharSequenceNode> itr = alts.iterator();
while(itr.hasNext()) {
CharSequenceNode seq = itr.next();
RegexpMatcher brex = seq.getBindingRegexp();
vars.addAll(brex.getGroups());
rex.append("(?:"+brex.getRegexp()+")");
if(itr.hasNext()) {
rex.append("|");
}
}
rex.append(")");
return new RegexpMatcher(vars, rex.toString(),
getNodeAdapter().getStringModelAdapter());
}
}