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19 package org.apache.myfaces.view.facelets.el;
20
21 import java.io.Externalizable;
22 import java.io.IOException;
23 import java.io.ObjectInput;
24 import java.io.ObjectOutput;
25
26 import javax.el.ELContext;
27 import javax.el.MethodExpression;
28 import javax.el.MethodInfo;
29 import javax.faces.FacesWrapper;
30 import javax.faces.context.FacesContext;
31 import javax.faces.view.Location;
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48 public class LocationMethodExpression extends MethodExpression
49 implements FacesWrapper<MethodExpression>, Externalizable, LocationAware
50 {
51
52 private static final long serialVersionUID = 1634644578979226893L;
53
54 private Location location;
55 private MethodExpression delegate;
56 int ccLevel;
57
58 public LocationMethodExpression()
59 {
60 super();
61 }
62
63 public LocationMethodExpression(Location location, MethodExpression delegate)
64 {
65 this.location = location;
66 this.delegate = delegate;
67 this.ccLevel = 0;
68 }
69
70 public LocationMethodExpression(Location location, MethodExpression delegate, int ccLevel)
71 {
72 this.location = location;
73 this.delegate = delegate;
74 this.ccLevel = ccLevel;
75 }
76
77 public Location getLocation()
78 {
79 return location;
80 }
81
82 public LocationMethodExpression apply(int newCCLevel)
83 {
84 if(this.ccLevel == newCCLevel)
85 {
86 return this;
87 }
88 else
89 {
90 return new LocationMethodExpression(this.location, this.delegate, newCCLevel);
91 }
92 }
93
94 @Override
95 public MethodInfo getMethodInfo(ELContext context)
96 {
97 FacesContext facesContext = (FacesContext) context.getContext(FacesContext.class);
98 CompositeComponentELUtils.saveCompositeComponentForResolver(facesContext, location, ccLevel);
99 try
100 {
101 return delegate.getMethodInfo(context);
102 }
103 finally
104 {
105 CompositeComponentELUtils.removeCompositeComponentForResolver(facesContext);
106 }
107 }
108
109 @Override
110 public Object invoke(ELContext context, Object[] params)
111 {
112 FacesContext facesContext = (FacesContext) context.getContext(FacesContext.class);
113 CompositeComponentELUtils.saveCompositeComponentForResolver(facesContext, location, ccLevel);
114 try
115 {
116 return delegate.invoke(context, params);
117 }
118 finally
119 {
120 CompositeComponentELUtils.removeCompositeComponentForResolver(facesContext);
121 }
122 }
123
124 @Override
125 public boolean equals(Object obj)
126 {
127 return delegate.equals(obj);
128 }
129
130 @Override
131 public String getExpressionString()
132 {
133 return delegate.getExpressionString();
134 }
135
136 @Override
137 public int hashCode()
138 {
139 return delegate.hashCode();
140 }
141
142 @Override
143 public boolean isLiteralText()
144 {
145 return delegate.isLiteralText();
146 }
147
148 public MethodExpression getWrapped()
149 {
150 return delegate;
151 }
152
153 public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
154 {
155 this.delegate = (MethodExpression) in.readObject();
156 this.location = (Location) in.readObject();
157 this.ccLevel = in.readInt();
158 }
159
160 public void writeExternal(ObjectOutput out) throws IOException
161 {
162 out.writeObject(this.delegate);
163 out.writeObject(this.location);
164 out.writeInt(this.ccLevel);
165 }
166
167 }