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java/org/apache/jasper/el/ELResolverImpl.java

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.jasper.el;
+
+import java.util.Iterator;
+import java.util.Objects;
+
+import javax.el.ELContext;
+import javax.el.ELException;
+import javax.el.ELResolver;
+import javax.el.ExpressionFactory;
+import javax.el.PropertyNotWritableException;
+import javax.servlet.jsp.el.VariableResolver;
+
+@Deprecated
+public final class ELResolverImpl extends ELResolver {
+
+    private final VariableResolver variableResolver;
+    private final ELResolver elResolver;
+
+    public ELResolverImpl(VariableResolver variableResolver,
+            ExpressionFactory factory) {
+        this.variableResolver = variableResolver;
+        this.elResolver = ELContextImpl.getDefaultResolver(factory);
+    }
+
+    @Override
+    public Object getValue(ELContext context, Object base, Object property) {
+        Objects.requireNonNull(context);
+
+        if (base == null) {
+            context.setPropertyResolved(base, property);
+            if (property != null) {
+                try {
+                    return this.variableResolver.resolveVariable(property
+                            .toString());
+                } catch (javax.servlet.jsp.el.ELException e) {
+                    throw new ELException(e.getMessage(), e.getCause());
+                }
+            }
+        }
+
+        if (!context.isPropertyResolved()) {
+            return elResolver.getValue(context, base, property);
+        }
+        return null;
+    }
+
+    @Override
+    public Class<?> getType(ELContext context, Object base, Object property) {
+        Objects.requireNonNull(context);
+
+        if (base == null) {
+            context.setPropertyResolved(base, property);
+            if (property != null) {
+                try {
+                    Object obj = this.variableResolver.resolveVariable(property
+                            .toString());
+                    return (obj != null) ? obj.getClass() : null;
+                } catch (javax.servlet.jsp.el.ELException e) {
+                    throw new ELException(e.getMessage(), e.getCause());
+                }
+            }
+        }
+
+        if (!context.isPropertyResolved()) {
+            return elResolver.getType(context, base, property);
+        }
+        return null;
+    }
+
+    @Override
+    public void setValue(ELContext context, Object base, Object property,
+            Object value) {
+        Objects.requireNonNull(context);
+
+        if (base == null) {
+            context.setPropertyResolved(base, property);
+            throw new PropertyNotWritableException(
+                    "Legacy VariableResolver wrapped, not writable");
+        }
+
+        if (!context.isPropertyResolved()) {
+            elResolver.setValue(context, base, property, value);
+        }
+    }
+
+    @Override
+    public boolean isReadOnly(ELContext context, Object base, Object property) {
+        Objects.requireNonNull(context);
+
+        if (base == null) {
+            context.setPropertyResolved(base, property);
+            return true;
+        }
+
+        return elResolver.isReadOnly(context, base, property);
+    }
+
+    @Override
+    public Iterator<java.beans.FeatureDescriptor> getFeatureDescriptors(ELContext context, Object base) {
+        return elResolver.getFeatureDescriptors(context, base);
+    }
+
+    @Override
+    public Class<?> getCommonPropertyType(ELContext context, Object base) {
+        if (base == null) {
+            return String.class;
+        }
+        return elResolver.getCommonPropertyType(context, base);
+    }
+}