| /* |
| $Id$ |
| |
| Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved. |
| |
| Redistribution and use of this software and associated documentation |
| ("Software"), with or without modification, are permitted provided |
| that the following conditions are met: |
| |
| 1. Redistributions of source code must retain copyright |
| statements and notices. Redistributions must also contain a |
| copy of this document. |
| |
| 2. Redistributions in binary form must reproduce the |
| above copyright notice, this list of conditions and the |
| following disclaimer in the documentation and/or other |
| materials provided with the distribution. |
| |
| 3. The name "groovy" must not be used to endorse or promote |
| products derived from this Software without prior written |
| permission of The Codehaus. For written permission, |
| please contact info@codehaus.org. |
| |
| 4. Products derived from this Software may not be called "groovy" |
| nor may "groovy" appear in their names without prior written |
| permission of The Codehaus. "groovy" is a registered |
| trademark of The Codehaus. |
| |
| 5. Due credit should be given to The Codehaus - |
| http://groovy.codehaus.org/ |
| |
| THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS |
| ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT |
| NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL |
| THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
| INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| */ |
| package org.codehaus.groovy.ast.expr; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.codehaus.groovy.ast.ClassHelper; |
| import org.codehaus.groovy.ast.GroovyCodeVisitor; |
| |
| /** |
| * Represents a String expression which contains embedded values inside |
| * it such as "hello there ${user} how are you" which is expanded lazily |
| * |
| * @author <a href="mailto:james@coredevelopers.net">James Strachan</a> |
| * @version $Revision$ |
| */ |
| public class GStringExpression extends Expression { |
| |
| private String verbatimText; |
| private List strings = new ArrayList(); |
| private List values = new ArrayList(); |
| |
| public GStringExpression(String verbatimText) { |
| this.verbatimText = verbatimText; |
| super.setType(ClassHelper.GSTRING_TYPE); |
| } |
| |
| public GStringExpression(String verbatimText, List strings, List values) { |
| this.verbatimText = verbatimText; |
| this.strings = strings; |
| this.values = values; |
| super.setType(ClassHelper.GSTRING_TYPE); |
| } |
| |
| public void visit(GroovyCodeVisitor visitor) { |
| visitor.visitGStringExpression(this); |
| } |
| |
| public Expression transformExpression(ExpressionTransformer transformer) { |
| Expression ret = new GStringExpression( |
| verbatimText, |
| transformExpressions(strings, transformer), |
| transformExpressions(values, transformer)); |
| ret.setSourcePosition(this); |
| return ret; |
| } |
| |
| public String toString() { |
| return super.toString() + "[strings: " + strings + " values: " + values + "]"; |
| } |
| |
| public String getText() { |
| return verbatimText; |
| } |
| |
| public List getStrings() { |
| return strings; |
| } |
| |
| public List getValues() { |
| return values; |
| } |
| |
| public void addString(ConstantExpression text) { |
| if (text == null) { |
| throw new NullPointerException("Cannot add a null text expression"); |
| } |
| strings.add(text); |
| } |
| |
| public void addValue(Expression value) { |
| // If the first thing is an value, then we need a dummy empty string in front of it so that when we |
| // toString it they come out in the correct order. |
| if (strings.size() == 0) |
| strings.add(ConstantExpression.EMPTY_STRING); |
| values.add(value); |
| } |
| |
| public Expression getValue(int idx) { |
| return (Expression) values.get(idx); |
| } |
| |
| public boolean isConstantString() { |
| return values.isEmpty(); |
| } |
| |
| public Expression asConstantString() { |
| StringBuffer buffer = new StringBuffer(); |
| for (Iterator iter = strings.iterator(); iter.hasNext();) { |
| ConstantExpression expression = (ConstantExpression) iter.next(); |
| Object value = expression.getValue(); |
| if (value != null) { |
| buffer.append(value); |
| } |
| } |
| return new ConstantExpression(buffer.toString()); |
| } |
| } |