Mercurial > hg > Members > kono > jpf-core
view src/main/gov/nasa/jpf/util/script/ScriptElementContainer.java @ 0:61d41facf527
initial v8 import (history reset)
author | Peter Mehlitz <Peter.C.Mehlitz@nasa.gov> |
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date | Fri, 23 Jan 2015 10:14:01 -0800 |
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/* * Copyright (C) 2014, United States Government, as represented by the * Administrator of the National Aeronautics and Space Administration. * All rights reserved. * * The Java Pathfinder core (jpf-core) platform is 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 gov.nasa.jpf.util.script; import java.io.PrintWriter; import java.util.Iterator; public abstract class ScriptElementContainer extends ScriptElement implements Iterable <ScriptElement> { protected class SECIterator implements Iterator<ScriptElement>, Cloneable { SECIterator prev; // to build ad hoc stacks ScriptElement cur; SECIterator () { cur = firstChild; } @Override public boolean hasNext() { return (cur != null); } @Override public ScriptElement next() { if (cur != null) { ScriptElement ret = cur; cur = cur.nextSibling; return ret; } else { return null; } } @Override public void remove() { throw new UnsupportedOperationException("no ScriptElement removal supported"); } public SECIterator getPrev() { return prev; } public void setPrev (SECIterator it) { prev = it; } @Override public Object clone() { try { // need to deep copy iterators SECIterator it = (SECIterator)super.clone(); if (prev != null) { it.prev = (SECIterator) prev.clone(); } return it; } catch (CloneNotSupportedException cnsx) { return null; // can't happen, just compiler pleasing } } } ScriptElement firstChild; ScriptElementContainer (ScriptElement parent, int line) { super(parent, line); } public ScriptElement getFirstChild () { return firstChild; } /** * beware, this sets the nextSibling */ public void add (ScriptElement e) { e.nextSibling = null; if (firstChild == null) { firstChild = e; } else { ScriptElement p=firstChild; while (p.nextSibling != null) p=p.nextSibling; p.nextSibling = e; } } public int getNumberOfChildren() { int n=0; ScriptElement e = firstChild; while (e != null) { n++; e = e.getNextSibling(); } return n; } @Override public SECIterator iterator () { return new SECIterator(); } void dump (PrintWriter w, int level, ScriptElement elem) { try { while (elem != null) { for (int i=0; i<level; i++) { w.print(" "); } w.print(elem); if (elem instanceof ScriptElementContainer) { ScriptElementContainer c = (ScriptElementContainer) elem; w.println(" {"); dump(w, level+1, c.getFirstChild()); for (int i=0; i<level; i++) { w.print(" "); } w.println("}"); } else { w.println(); } elem = elem.getNextSibling(); } } catch (Throwable t) { t.printStackTrace(); } } protected String toString (String type) { StringBuilder sb = new StringBuilder(); if (type != null) { sb.append(type); sb.append(' '); } sb.append("{"); int i=0; for (ScriptElement e = firstChild; e != null; e = e.nextSibling) { if (i++ > 0) { sb.append(','); } sb.append(e); } sb.append("}"); return sb.toString(); } @Override public String toString() { return toString(null); } public void dump (PrintWriter w) { dump(w, 0, firstChild); } public void processChildren(ElementProcessor p) { for (ScriptElement e = firstChild; e != null; e = e.nextSibling) { e.process(p); } } }