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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 public LocationMethodExpression apply(int newCCLevel, Location newLocation)
95 {
96 if(this.ccLevel == newCCLevel && this.location.getPath().equals(newLocation.getPath()))
97 {
98 return this;
99 }
100 else
101 {
102 return new LocationMethodExpression(newLocation, this.delegate, newCCLevel);
103 }
104 }
105
106 @Override
107 public MethodInfo getMethodInfo(ELContext context)
108 {
109 FacesContext facesContext = (FacesContext) context.getContext(FacesContext.class);
110 CompositeComponentELUtils.saveCompositeComponentForResolver(facesContext, location, ccLevel);
111 try
112 {
113 return delegate.getMethodInfo(context);
114 }
115 finally
116 {
117 CompositeComponentELUtils.removeCompositeComponentForResolver(facesContext);
118 }
119 }
120
121 @Override
122 public Object invoke(ELContext context, Object[] params)
123 {
124 FacesContext facesContext = (FacesContext) context.getContext(FacesContext.class);
125 CompositeComponentELUtils.saveCompositeComponentForResolver(facesContext, location, ccLevel);
126 try
127 {
128 return delegate.invoke(context, params);
129 }
130 finally
131 {
132 CompositeComponentELUtils.removeCompositeComponentForResolver(facesContext);
133 }
134 }
135
136 @Override
137 public boolean equals(Object obj)
138 {
139 return delegate.equals(obj);
140 }
141
142 @Override
143 public String getExpressionString()
144 {
145 return delegate.getExpressionString();
146 }
147
148 @Override
149 public int hashCode()
150 {
151 return delegate.hashCode();
152 }
153
154 @Override
155 public boolean isLiteralText()
156 {
157 return delegate.isLiteralText();
158 }
159
160 public MethodExpression getWrapped()
161 {
162 return delegate;
163 }
164
165 public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
166 {
167 this.delegate = (MethodExpression) in.readObject();
168 this.location = (Location) in.readObject();
169 this.ccLevel = in.readInt();
170 }
171
172 public void writeExternal(ObjectOutput out) throws IOException
173 {
174 out.writeObject(this.delegate);
175 out.writeObject(this.location);
176 out.writeInt(this.ccLevel);
177 }
178
179 }