| /* |
| * 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 freemarker.template.TemplateException; |
| import freemarker.template.TemplateModel; |
| import freemarker.template._TemplateAPI; |
| import freemarker.template._VersionInts; |
| |
| /** |
| * A class that represents a Range between two integers. |
| */ |
| final class Range extends Expression { |
| |
| static final int END_INCLUSIVE = 0; |
| static final int END_EXCLUSIVE = 1; |
| static final int END_UNBOUND = 2; |
| static final int END_SIZE_LIMITED = 3; |
| |
| final Expression lho; |
| final Expression rho; |
| final int endType; |
| |
| Range(Expression lho, Expression rho, int endType) { |
| this.lho = lho; |
| this.rho = rho; |
| this.endType = endType; |
| } |
| |
| int getEndType() { |
| return endType; |
| } |
| |
| @Override |
| TemplateModel _eval(Environment env) throws TemplateException { |
| final int begin = lho.evalToNumber(env).intValue(); |
| if (endType != END_UNBOUND) { |
| final int lhoValue = rho.evalToNumber(env).intValue(); |
| return new BoundedRangeModel( |
| begin, endType != END_SIZE_LIMITED ? lhoValue : begin + lhoValue, |
| endType == END_INCLUSIVE, endType == END_SIZE_LIMITED); |
| } else { |
| return _TemplateAPI.getTemplateLanguageVersionAsInt(this) >= _VersionInts.V_2_3_21 |
| ? new ListableRightUnboundedRangeModel(begin) |
| : new NonListableRightUnboundedRangeModel(begin); |
| } |
| } |
| |
| // Surely this way we can tell that it won't be a boolean without evaluating the range, but why was this important? |
| @Override |
| boolean evalToBoolean(Environment env) throws TemplateException { |
| throw new NonBooleanException(this, new BoundedRangeModel(0, 0, false, false), env); |
| } |
| |
| @Override |
| public String getCanonicalForm() { |
| String rhs = rho != null ? rho.getCanonicalForm() : ""; |
| return lho.getCanonicalForm() + getNodeTypeSymbol() + rhs; |
| } |
| |
| @Override |
| String getNodeTypeSymbol() { |
| switch (endType) { |
| case END_EXCLUSIVE: return "..<"; |
| case END_INCLUSIVE: return ".."; |
| case END_UNBOUND: return ".."; |
| case END_SIZE_LIMITED: return "..*"; |
| default: throw new BugException(endType); |
| } |
| } |
| |
| @Override |
| boolean isLiteral() { |
| boolean rightIsLiteral = rho == null || rho.isLiteral(); |
| return constantValue != null || (lho.isLiteral() && rightIsLiteral); |
| } |
| |
| @Override |
| protected Expression deepCloneWithIdentifierReplaced_inner( |
| String replacedIdentifier, Expression replacement, ReplacemenetState replacementState) { |
| return new Range( |
| lho.deepCloneWithIdentifierReplaced(replacedIdentifier, replacement, replacementState), |
| rho.deepCloneWithIdentifierReplaced(replacedIdentifier, replacement, replacementState), |
| endType); |
| } |
| |
| @Override |
| int getParameterCount() { |
| return 2; |
| } |
| |
| @Override |
| Object getParameterValue(int idx) { |
| switch (idx) { |
| case 0: return lho; |
| case 1: return rho; |
| default: throw new IndexOutOfBoundsException(); |
| } |
| } |
| |
| @Override |
| ParameterRole getParameterRole(int idx) { |
| return ParameterRole.forBinaryOperatorOperand(idx); |
| } |
| |
| } |