| /* |
| * 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 java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.ListIterator; |
| |
| import freemarker.template.SimpleSequence; |
| import freemarker.template.TemplateException; |
| import freemarker.template.TemplateMethodModel; |
| import freemarker.template.TemplateMethodModelEx; |
| import freemarker.template.TemplateModel; |
| import freemarker.template.TemplateSequenceModel; |
| |
| final class ListLiteral extends Expression { |
| |
| final ArrayList/*<Expression>*/ items; |
| |
| ListLiteral(ArrayList items) { |
| this.items = items; |
| items.trimToSize(); |
| } |
| |
| @Override |
| TemplateModel _eval(Environment env) throws TemplateException { |
| SimpleSequence list = new SimpleSequence(items.size()); |
| for (Iterator it = items.iterator(); it.hasNext(); ) { |
| Expression exp = (Expression) it.next(); |
| TemplateModel tm = exp.eval(env); |
| if (env == null || !env.isClassicCompatible()) { |
| exp.assertNonNull(tm, env); |
| } |
| list.add(tm); |
| } |
| return list; |
| } |
| |
| /** |
| * For {@link TemplateMethodModel} calls, but not for {@link TemplateMethodModelEx}-es, returns the list of |
| * arguments as {@link String}-s. |
| */ |
| List/*<String>*/ getValueList(Environment env) throws TemplateException { |
| int size = items.size(); |
| switch(size) { |
| case 0: { |
| return Collections.EMPTY_LIST; |
| } |
| case 1: { |
| return Collections.singletonList(((Expression) items.get(0)).evalAndCoerceToPlainText(env)); |
| } |
| default: { |
| List result = new ArrayList(items.size()); |
| for (ListIterator iterator = items.listIterator(); iterator.hasNext(); ) { |
| Expression exp = (Expression) iterator.next(); |
| result.add(exp.evalAndCoerceToPlainText(env)); |
| } |
| return result; |
| } |
| } |
| } |
| |
| /** |
| * For {@link TemplateMethodModelEx} calls, returns the list of arguments as {@link TemplateModel}-s. |
| */ |
| List/*<TemplateModel>*/ getModelList(Environment env) throws TemplateException { |
| int size = items.size(); |
| switch(size) { |
| case 0: { |
| return Collections.EMPTY_LIST; |
| } |
| case 1: { |
| return Collections.singletonList(((Expression) items.get(0)).eval(env)); |
| } |
| default: { |
| List result = new ArrayList(items.size()); |
| for (ListIterator iterator = items.listIterator(); iterator.hasNext(); ) { |
| Expression exp = (Expression) iterator.next(); |
| result.add(exp.eval(env)); |
| } |
| return result; |
| } |
| } |
| } |
| |
| @Override |
| public String getCanonicalForm() { |
| StringBuilder buf = new StringBuilder("["); |
| int size = items.size(); |
| for (int i = 0; i < size; i++) { |
| Expression value = (Expression) items.get(i); |
| buf.append(value.getCanonicalForm()); |
| if (i != size - 1) { |
| buf.append(", "); |
| } |
| } |
| buf.append("]"); |
| return buf.toString(); |
| } |
| |
| @Override |
| String getNodeTypeSymbol() { |
| return "[...]"; |
| } |
| |
| @Override |
| boolean isLiteral() { |
| if (constantValue != null) { |
| return true; |
| } |
| for (int i = 0; i < items.size(); i++) { |
| Expression exp = (Expression) items.get(i); |
| if (!exp.isLiteral()) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| // A hacky routine used by VisitNode and RecurseNode |
| |
| TemplateSequenceModel evaluateStringsToNamespaces(Environment env) throws TemplateException { |
| TemplateSequenceModel val = (TemplateSequenceModel) eval(env); |
| SimpleSequence result = new SimpleSequence(val.size()); |
| for (int i = 0; i < items.size(); i++) { |
| Object itemExpr = items.get(i); |
| if (itemExpr instanceof StringLiteral) { |
| String s = ((StringLiteral) itemExpr).getAsString(); |
| try { |
| Environment.Namespace ns = env.importLib(s, null); |
| result.add(ns); |
| } catch (IOException ioe) { |
| throw new _MiscTemplateException(((StringLiteral) itemExpr), |
| "Couldn't import library ", new _DelayedJQuote(s), ": ", |
| new _DelayedGetMessage(ioe)); |
| } |
| } else { |
| result.add(val.get(i)); |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| protected Expression deepCloneWithIdentifierReplaced_inner( |
| String replacedIdentifier, Expression replacement, ReplacemenetState replacementState) { |
| ArrayList clonedValues = (ArrayList) items.clone(); |
| for (ListIterator iter = clonedValues.listIterator(); iter.hasNext(); ) { |
| iter.set(((Expression) iter.next()).deepCloneWithIdentifierReplaced( |
| replacedIdentifier, replacement, replacementState)); |
| } |
| return new ListLiteral(clonedValues); |
| } |
| |
| @Override |
| int getParameterCount() { |
| return items != null ? items.size() : 0; |
| } |
| |
| @Override |
| Object getParameterValue(int idx) { |
| checkIndex(idx); |
| return items.get(idx); |
| } |
| |
| @Override |
| ParameterRole getParameterRole(int idx) { |
| checkIndex(idx); |
| return ParameterRole.ITEM_VALUE; |
| } |
| |
| private void checkIndex(int idx) { |
| if (items == null || idx >= items.size()) { |
| throw new IndexOutOfBoundsException(); |
| } |
| } |
| |
| } |