001 package org.codehaus.groovy.sandbox.markup; 002 /* 003 004 Copyright 2004 (C) John Wilson. All Rights Reserved. 005 006 Redistribution and use of this software and associated documentation 007 ("Software"), with or without modification, are permitted provided 008 that the following conditions are met: 009 010 1. Redistributions of source code must retain copyright 011 statements and notices. Redistributions must also contain a 012 copy of this document. 013 014 2. Redistributions in binary form must reproduce the 015 above copyright notice, this list of conditions and the 016 following disclaimer in the documentation and/or other 017 materials provided with the distribution. 018 019 3. The name "groovy" must not be used to endorse or promote 020 products derived from this Software without prior written 021 permission of The Codehaus. For written permission, 022 please contact info@codehaus.org. 023 024 4. Products derived from this Software may not be called "groovy" 025 nor may "groovy" appear in their names without prior written 026 permission of The Codehaus. "groovy" is a registered 027 trademark of The Codehaus. 028 029 5. Due credit should be given to The Codehaus - 030 http://groovy.codehaus.org/ 031 032 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS 033 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 034 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 035 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 036 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 037 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 038 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 039 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 040 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 041 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 042 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 043 OF THE POSSIBILITY OF SUCH DAMAGE. 044 045 */ 046 047 import groovy.lang.Closure; 048 049 import java.util.Collections; 050 import java.util.HashMap; 051 import java.util.Map; 052 053 public class BaseMarkupBuilder extends Builder { 054 public BaseMarkupBuilder(final Map namespaceMethodMap) { 055 super(namespaceMethodMap); 056 } 057 058 public Object bind(final Closure root) { 059 return new Document(root, this.namespaceMethodMap); 060 } 061 062 private static class Document extends Built { 063 private Object out; 064 private final Map pendingNamespaces = new HashMap(); 065 private final Map namespaces = new HashMap(); 066 private String prefix = ""; 067 068 public Document(final Closure root, final Map namespaceMethodMap) { 069 super(root, namespaceMethodMap); 070 071 this.namespaces.put("xml", "http://www.w3.org/XML/1998/namespace"); // built in namespace 072 this.namespaces.put("mkp", "http://www.codehaus.org/Groovy/markup/keywords"); // pseudo namespace for markup keywords 073 } 074 075 /* (non-Javadoc) 076 * @see groovy.lang.GroovyObject#invokeMethod(java.lang.String, java.lang.Object) 077 */ 078 public Object invokeMethod(final String name, final Object args) { 079 final Object[] arguments = (Object[]) args; 080 Map attrs = Collections.EMPTY_MAP; 081 Object body = null; 082 083 084 // 085 // Sort the parameters out 086 // 087 for (int i = 0; i != arguments.length; i++) { 088 final Object arg = arguments[i]; 089 090 if (arg instanceof Map) { 091 attrs = (Map)arg; 092 } else if (arg instanceof Closure) { 093 final Closure c = ((Closure) arg); 094 095 c.setDelegate(this); 096 body = c.asWritable(); 097 } else { 098 body = arg; 099 } 100 } 101 102 // 103 // call the closure corresponding to the tag 104 // 105 final Object uri; 106 107 if (this.pendingNamespaces.containsKey(this.prefix)) { 108 uri = this.pendingNamespaces.get(this.prefix); 109 } else if (this.namespaces.containsKey(this.prefix)) { 110 uri = this.namespaces.get(this.prefix); 111 } else { 112 uri = ":"; 113 } 114 115 final Object[] info = (Object[])this.namespaceSpecificTags.get(uri); 116 final Map tagMap = (Map)info[2]; 117 final Closure defaultTagClosure = (Closure)info[0]; 118 119 final String prefix = this.prefix; 120 this.prefix = ""; 121 122 if (tagMap.containsKey(name)) { 123 return ((Closure)tagMap.get(name)).call(new Object[]{this, this.pendingNamespaces, this.namespaces, this.namespaceSpecificTags, prefix, attrs, body, this.out}); 124 } else { 125 return defaultTagClosure.call(new Object[]{name, this, this.pendingNamespaces, this.namespaces, this.namespaceSpecificTags, prefix, attrs, body, this.out}); 126 } 127 } 128 129 /* (non-Javadoc) 130 * @see groovy.lang.GroovyObject#getProperty(java.lang.String) 131 */ 132 public Object getProperty(final String property) { 133 this.prefix = property; 134 return this; 135 } 136 137 /* (non-Javadoc) 138 * @see groovy.lang.GroovyObject#setProperty(java.lang.String, java.lang.Object) 139 */ 140 public void setProperty(String property, Object newValue) { 141 if ("trigger".equals(property)) { 142 this.out = newValue; 143 this.root.call(); 144 } else { 145 super.setProperty(property, newValue); 146 } 147 } 148 } 149 }