1.1 --- a/json/src/main/java/org/netbeans/html/json/spi/PropertyBinding.java	Sun Dec 13 21:12:26 2015 +0100
     1.2 +++ b/json/src/main/java/org/netbeans/html/json/spi/PropertyBinding.java	Mon Feb 22 19:58:32 2016 +0100
     1.3 @@ -45,6 +45,7 @@
     1.4  import java.lang.ref.Reference;
     1.5  import java.lang.ref.WeakReference;
     1.6  import net.java.html.BrwsrCtx;
     1.7 +import net.java.html.json.ComputedProperty;
     1.8  import org.netbeans.html.json.impl.Bindings;
     1.9  import org.netbeans.html.json.impl.JSON;
    1.10  import org.netbeans.html.json.impl.PropertyBindingAccessor;
    1.11 @@ -93,10 +94,8 @@
    1.12  
    1.13              @Override
    1.14              protected <M> PropertyBinding newBinding(
    1.15 -                Proto.Type<M> access, Bindings<?> bindings, String name,
    1.16 -                int index, M model, boolean readOnly
    1.17 -            ) {
    1.18 -                return new Impl(model, bindings, name, index, access, readOnly);
    1.19 +                Proto.Type<M> access, Bindings<?> bindings, String name, int index, M model, byte propertyType) {
    1.20 +                return new Impl(model, bindings, name, index, access, propertyType);
    1.21              }
    1.22          };
    1.23      }
    1.24 @@ -121,12 +120,22 @@
    1.25       */
    1.26      public abstract Object getValue();
    1.27  
    1.28 -    /** Is this property read only? Or can one call {@link #setValue(java.lang.Object)}?
    1.29 +    /** Is this property read only?. Or can one call {@link #setValue(java.lang.Object)}?
    1.30 +     * The property can still change, but only as a result of other
    1.31 +     * properties being changed, just like {@link ComputedProperty} can.
    1.32       *
    1.33       * @return true, if this property is read only
    1.34       */
    1.35      public abstract boolean isReadOnly();
    1.36  
    1.37 +    /** Is this property constant?. If a property is constant, than its
    1.38 +     * value cannot changed after it is read.
    1.39 +     *
    1.40 +     * @return true, if this property is constant
    1.41 +     * @since 1.3
    1.42 +     */
    1.43 +    public abstract boolean isConstant();
    1.44 +
    1.45      /** Returns identical version of the binding, but one that holds on the
    1.46       * original model object via weak reference.
    1.47       *
    1.48 @@ -137,17 +146,17 @@
    1.49  
    1.50      private static abstract class AImpl<M> extends PropertyBinding {
    1.51          public final String name;
    1.52 -        public final boolean readOnly;
    1.53 +        public final byte propertyType;
    1.54          final Proto.Type<M> access;
    1.55          final Bindings<?> bindings;
    1.56          final int index;
    1.57  
    1.58 -        public AImpl(Bindings<?> bindings, String name, int index, Proto.Type<M> access, boolean readOnly) {
    1.59 +        public AImpl(Bindings<?> bindings, String name, int index, Proto.Type<M> access, byte propertyType) {
    1.60              this.bindings = bindings;
    1.61              this.name = name;
    1.62              this.index = index;
    1.63              this.access = access;
    1.64 -            this.readOnly = readOnly;
    1.65 +            this.propertyType = propertyType;
    1.66          }
    1.67  
    1.68          protected abstract M model();
    1.69 @@ -174,7 +183,12 @@
    1.70  
    1.71          @Override
    1.72          public boolean isReadOnly() {
    1.73 -            return readOnly;
    1.74 +            return (propertyType & 1) != 0;
    1.75 +        }
    1.76 +
    1.77 +        @Override
    1.78 +        public boolean isConstant() {
    1.79 +            return (propertyType & 2) != 0;
    1.80          }
    1.81  
    1.82          @Override
    1.83 @@ -186,8 +200,8 @@
    1.84      private static final class Impl<M> extends AImpl<M> {
    1.85          private final M model;
    1.86  
    1.87 -        public Impl(M model, Bindings<?> bindings, String name, int index, Proto.Type<M> access, boolean readOnly) {
    1.88 -            super(bindings, name, index, access, readOnly);
    1.89 +        public Impl(M model, Bindings<?> bindings, String name, int index, Proto.Type<M> access, byte propertyType) {
    1.90 +            super(bindings, name, index, access, propertyType);
    1.91              this.model = model;
    1.92          }
    1.93  
    1.94 @@ -198,14 +212,14 @@
    1.95  
    1.96          @Override
    1.97          public PropertyBinding weak() {
    1.98 -            return new Weak(model, bindings, name, index, access, readOnly);
    1.99 +            return new Weak(model, bindings, name, index, access, propertyType);
   1.100          }
   1.101      }
   1.102  
   1.103      private static final class Weak<M> extends AImpl<M> {
   1.104          private final Reference<M> ref;
   1.105 -        public Weak(M model, Bindings<?> bindings, String name, int index, Proto.Type<M> access, boolean readOnly) {
   1.106 -            super(bindings, name, index, access, readOnly);
   1.107 +        public Weak(M model, Bindings<?> bindings, String name, int index, Proto.Type<M> access, byte propertyType) {
   1.108 +            super(bindings, name, index, access, propertyType);
   1.109              this.ref = new WeakReference<M>(model);
   1.110          }
   1.111