| /* |
| * 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 org.apache.cocoon.template.instruction; |
| |
| import java.util.Iterator; |
| import java.util.Stack; |
| |
| import org.apache.cocoon.ProcessingException; |
| import org.apache.cocoon.components.expression.ExpressionContext; |
| import org.apache.cocoon.environment.TemplateObjectModelHelper; |
| import org.apache.cocoon.template.environment.ErrorHolder; |
| import org.apache.cocoon.template.environment.ExecutionContext; |
| import org.apache.cocoon.template.environment.ParsingContext; |
| import org.apache.cocoon.template.expression.JXTExpression; |
| import org.apache.cocoon.template.expression.Literal; |
| import org.apache.cocoon.template.expression.Subst; |
| import org.apache.cocoon.template.script.Invoker; |
| import org.apache.cocoon.template.script.event.AttributeEvent; |
| import org.apache.cocoon.template.script.event.CopyAttribute; |
| import org.apache.cocoon.template.script.event.Event; |
| import org.apache.cocoon.template.script.event.StartDocument; |
| import org.apache.cocoon.template.script.event.StartElement; |
| import org.apache.cocoon.template.script.event.SubstituteAttribute; |
| import org.apache.cocoon.xml.XMLConsumer; |
| import org.xml.sax.Attributes; |
| import org.xml.sax.Locator; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.SAXParseException; |
| |
| /** |
| * @version SVN $Id$ |
| */ |
| public class Import extends Instruction { |
| |
| private final AttributeEvent uri; |
| private final JXTExpression select; |
| |
| public Import(ParsingContext parsingContext, StartElement raw, Attributes attrs, Stack stack) |
| throws SAXException { |
| |
| super(raw); |
| |
| // <import uri="${root}/foo/bar.xml" context="${foo}"/> |
| Locator locator = getLocation(); |
| Iterator iter = raw.getAttributeEvents().iterator(); |
| AttributeEvent uri = null; |
| JXTExpression select = null; |
| while (iter.hasNext()) { |
| AttributeEvent e = (AttributeEvent) iter.next(); |
| if (e.getLocalName().equals("uri")) { |
| uri = e; |
| break; |
| } |
| } |
| if (uri != null) { |
| // If "context" is present then its value will be used |
| // as the context object in the imported template |
| String context = attrs.getValue("context"); |
| if (context != null) { |
| select = parsingContext.getStringTemplateParser().compileExpr(context, "import: \"context\": ", locator); |
| } |
| } else { |
| throw new SAXParseException("import: \"uri\" is required", locator, null); |
| } |
| this.uri = uri; |
| this.select = select; |
| } |
| |
| public Event execute(final XMLConsumer consumer, |
| ExpressionContext expressionContext, ExecutionContext executionContext, |
| MacroContext macroContext, Event startEvent, Event endEvent) |
| throws SAXException { |
| String uri; |
| AttributeEvent e = this.uri; |
| if (e instanceof CopyAttribute) { |
| CopyAttribute copy = (CopyAttribute) e; |
| uri = copy.getValue(); |
| } else { |
| StringBuffer buf = new StringBuffer(); |
| SubstituteAttribute substAttr = (SubstituteAttribute) e; |
| Iterator i = substAttr.getSubstitutions().iterator(); |
| while (i.hasNext()) { |
| Subst subst = (Subst) i.next(); |
| if (subst instanceof Literal) { |
| Literal lit = (Literal) subst; |
| buf.append(lit.getValue()); |
| } else if (subst instanceof JXTExpression) { |
| JXTExpression expr = (JXTExpression) subst; |
| Object val; |
| try { |
| val = expr.getValue(expressionContext); |
| } catch (Exception exc) { |
| throw new SAXParseException(exc.getMessage(), getLocation(), exc); |
| } catch (Error err) { |
| throw new SAXParseException(err.getMessage(), |
| getLocation(), new ErrorHolder(err)); |
| } |
| buf.append(val != null ? val.toString() : ""); |
| } |
| } |
| uri = buf.toString(); |
| } |
| StartDocument doc; |
| try { |
| doc = executionContext.getScriptManager().resolveTemplate(uri); |
| } catch (ProcessingException exc) { |
| throw new SAXParseException(exc.getMessage(), getLocation(), exc); |
| } |
| ExpressionContext selectExpressionContext = expressionContext; |
| if (this.select != null) { |
| try { |
| Object obj = this.select.getValue(expressionContext); |
| selectExpressionContext = new ExpressionContext(expressionContext); |
| selectExpressionContext.setContextBean(obj); |
| TemplateObjectModelHelper.fillContext(obj, selectExpressionContext); |
| } catch (Exception exc) { |
| throw new SAXParseException(exc.getMessage(), getLocation(), exc); |
| } catch (Error err) { |
| throw new SAXParseException(err.getMessage(), getLocation(), |
| new ErrorHolder(err)); |
| } |
| } |
| try { |
| Invoker.execute(consumer, expressionContext, executionContext, |
| macroContext, doc.getNext(), doc.getEndDocument()); |
| } catch (Exception exc) { |
| throw new SAXParseException( |
| "Exception occurred in imported template " + uri |
| + ": " + exc.getMessage(), getLocation(), exc); |
| } |
| return getEndInstruction().getNext(); |
| } |
| } |