001/**
002 *
003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
004 *
005 * This library is free software; you can redistribute it and/or
006 * modify it under the terms of the GNU Lesser General Public
007 * License as published by the Free Software Foundation; either 
008 * version 2.1 of the License, or (at your option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013 * Lesser General Public License for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public 
016 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
017 * 
018 **/
019package lucee.transformer.bytecode.statement.tag;
020
021import lucee.transformer.bytecode.BytecodeContext;
022import lucee.transformer.bytecode.BytecodeException;
023import lucee.transformer.bytecode.Position;
024import lucee.transformer.bytecode.expression.Expression;
025import lucee.transformer.bytecode.statement.FlowControlBreak;
026import lucee.transformer.bytecode.statement.FlowControlContinue;
027import lucee.transformer.bytecode.visitor.WhileVisitor;
028
029import org.objectweb.asm.Label;
030
031public final class TagWhile extends TagBaseNoFinal implements FlowControlBreak,FlowControlContinue {
032
033        private WhileVisitor wv;
034        private String label;
035
036        public TagWhile(Position start,Position end) {
037                super(start,end);
038        }
039
040
041        /**
042         * @see lucee.transformer.bytecode.statement.StatementBase#_writeOut(org.objectweb.asm.commons.GeneratorAdapter)
043         */
044        public void _writeOut(BytecodeContext bc) throws BytecodeException {
045                wv = new WhileVisitor();
046                wv.visitBeforeExpression(bc);
047                        getAttribute("condition").getValue().writeOut(bc, Expression.MODE_VALUE);
048                wv.visitAfterExpressionBeforeBody(bc);
049                        getBody().writeOut(bc);
050                wv.visitAfterBody(bc,getEnd());
051        }
052
053
054        /**
055         * @see lucee.transformer.bytecode.statement.FlowControl#getBreakLabel()
056         */
057        public Label getBreakLabel() {
058                return wv.getBreakLabel();
059        }
060
061
062        /**
063         * @see lucee.transformer.bytecode.statement.FlowControl#getContinueLabel()
064         */
065        public Label getContinueLabel() {
066                return wv.getContinueLabel();
067        }
068
069
070        @Override
071        public String getLabel() {
072                return label;
073        }
074
075        public void setLabel(String label) {
076                this.label=label;
077        }
078
079}