occurence constraints for xml

plugins/relaxng/src/org/intellij/plugins/relaxNG/model/descriptors/CompositeDescriptor.java

@@ -73,6 +73,22 @@ public class CompositeDescriptor extends RngElementDescriptor {
     return computeAttributeDescriptor(AttributeFinder.find(qname, myPatterns));
   }
 
+  /**
+   * @return minimal occurrence constraint value (e.g. 0 or 1), on null if not applied
+   */
+  @Override
+  public Integer getMinOccurs() {
+    return null;
+  }
+
+  /**
+   * @return maximal occurrence constraint value (e.g. 1 or {@link Integer.MAX_VALUE}), on null if not applied
+   */
+  @Override
+  public Integer getMaxOccurs() {
+    return null;
+  }
+
   protected XmlAttributeDescriptor[] collectAttributeDescriptors(@Nullable XmlTag context) {
 
     final QName qName = context == null ?

xml/dom-impl/src/com/intellij/xml/impl/dom/AbstractDomChildrenDescriptor.java

@@ -63,6 +63,22 @@ public abstract class AbstractDomChildrenDescriptor implements XmlElementDescrip
             return name.getXmlName().getLocalName();
           }
 
+          /**
+           * @return minimal occurrence constraint value (e.g. 0 or 1), on null if not applied
+           */
+          @Override
+          public Integer getMinOccurs() {
+            return null;
+          }
+
+          /**
+           * @return maximal occurrence constraint value (e.g. 1 or {@link Integer.MAX_VALUE}), on null if not applied
+           */
+          @Override
+          public Integer getMaxOccurs() {
+            return null;
+          }
+
           @Override
           @Nullable
           public PsiElement getDeclaration() {
@@ -115,6 +131,22 @@ public abstract class AbstractDomChildrenDescriptor implements XmlElementDescrip
           return finalDomElement.getXmlElementName();
         }
 
+        /**
+         * @return minimal occurrence constraint value (e.g. 0 or 1), on null if not applied
+         */
+        @Override
+        public Integer getMinOccurs() {
+          return null;
+        }
+
+        /**
+         * @return maximal occurrence constraint value (e.g. 1 or {@link Integer.MAX_VALUE}), on null if not applied
+         */
+        @Override
+        public Integer getMaxOccurs() {
+          return null;
+        }
+
         @Override
         @Nullable
         public PsiElement getDeclaration() {

xml/dom-impl/src/com/intellij/xml/impl/dom/DomElementXmlDescriptor.java

@@ -53,6 +53,22 @@ public class DomElementXmlDescriptor extends AbstractDomChildrenDescriptor {
     return myChildrenDescription.getXmlElementName();
   }
 
+  /**
+   * @return minimal occurrence constraint value (e.g. 0 or 1), on null if not applied
+   */
+  @Override
+  public Integer getMinOccurs() {
+    return null;
+  }
+
+  /**
+   * @return maximal occurrence constraint value (e.g. 1 or {@link Integer.MAX_VALUE}), on null if not applied
+   */
+  @Override
+  public Integer getMaxOccurs() {
+    return null;
+  }
+
   @Nullable
   public PsiElement getDeclaration() {
     final DomElement declaration = myChildrenDescription.getUserData(DomExtension.KEY_DECLARATION);

xml/impl/src/com/intellij/html/impl/RelaxedHtmlFromSchemaElementDescriptor.java

@@ -88,6 +88,22 @@ public class RelaxedHtmlFromSchemaElementDescriptor extends XmlElementDescriptor
     return getAttributeDescriptor(attribute.getName(), attribute.getParent());
   }
 
+  /**
+   * @return minimal occurrence constraint value (e.g. 0 or 1), on null if not applied
+   */
+  @Override
+  public Integer getMinOccurs() {
+    return null;
+  }
+
+  /**
+   * @return maximal occurrence constraint value (e.g. 1 or {@link Integer.MAX_VALUE}), on null if not applied
+   */
+  @Override
+  public Integer getMaxOccurs() {
+    return null;
+  }
+
   public XmlAttributeDescriptor getAttributeDescriptor(String attributeName, final XmlTag context) {
     final XmlAttributeDescriptor descriptor = super.getAttributeDescriptor(attributeName.toLowerCase(), context);
     if (descriptor != null) return descriptor;

xml/impl/src/com/intellij/psi/impl/source/html/dtd/HtmlElementDescriptorImpl.java

@@ -131,6 +131,22 @@ public class HtmlElementDescriptorImpl extends BaseXmlElementDescriptorImpl {
     return myDelegate.getNSDescriptor();
   }
 
+  /**
+   * @return minimal occurrence constraint value (e.g. 0 or 1), on null if not applied
+   */
+  @Override
+  public Integer getMinOccurs() {
+    return null;
+  }
+
+  /**
+   * @return maximal occurrence constraint value (e.g. 1 or {@link Integer.MAX_VALUE}), on null if not applied
+   */
+  @Override
+  public Integer getMaxOccurs() {
+    return null;
+  }
+
   public int getContentType() {
     return myDelegate.getContentType();
   }

xml/impl/src/com/intellij/xml/impl/dtd/XmlElementDescriptorImpl.java

@@ -94,6 +94,22 @@ public class XmlElementDescriptorImpl extends BaseXmlElementDescriptorImpl imple
     return getNsDescriptorFrom(myElementDecl);
   }
 
+  /**
+   * @return minimal occurrence constraint value (e.g. 0 or 1), on null if not applied
+   */
+  @Override
+  public Integer getMinOccurs() {
+    return null;
+  }
+
+  /**
+   * @return maximal occurrence constraint value (e.g. 1 or {@link Integer.MAX_VALUE}), on null if not applied
+   */
+  @Override
+  public Integer getMaxOccurs() {
+    return null;
+  }
+
   @Nullable
   private static XmlNSDescriptor getNsDescriptorFrom(final PsiElement elementDecl) {
     final XmlFile file = XmlUtil.getContainingFile(elementDecl);

xml/impl/src/com/intellij/xml/impl/schema/XmlElementDescriptorByType.java

@@ -60,6 +60,22 @@ public class XmlElementDescriptorByType extends XmlElementDescriptorImpl {
     return nsDescriptor;
   }
 
+  /**
+   * @return minimal occurrence constraint value (e.g. 0 or 1), on null if not applied
+   */
+  @Override
+  public Integer getMinOccurs() {
+    return null;
+  }
+
+  /**
+   * @return maximal occurrence constraint value (e.g. 1 or {@link Integer.MAX_VALUE}), on null if not applied
+   */
+  @Override
+  public Integer getMaxOccurs() {
+    return null;
+  }
+
   public ComplexTypeDescriptor getType(XmlElement context) {
     return myType;
   }

xml/impl/src/com/intellij/xml/util/HtmlUtil.java

@@ -270,6 +270,22 @@ public class HtmlUtil {
           return tagName;
         }
 
+        /**
+         * @return minimal occurrence constraint value (e.g. 0 or 1), on null if not applied
+         */
+        @Override
+        public Integer getMinOccurs() {
+          return null;
+        }
+
+        /**
+         * @return maximal occurrence constraint value (e.g. 1 or {@link Integer.MAX_VALUE}), on null if not applied
+         */
+        @Override
+        public Integer getMaxOccurs() {
+          return null;
+        }
+
         public boolean allowElementsFromNamespace(final String namespace, final XmlTag context) {
           return true;
         }