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package com.sun.faces.facelets.el;
import com.sun.faces.facelets.util.ReflectionUtil;
import javax.el.FunctionMapper;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* Default implementation of the FunctionMapper
*
* @author Jacob Hookom
* @version $Id: DefaultFunctionMapper.java 8641 2010-10-04 20:54:50Z edburns $
* @see java.lang.reflect.Method
* @see javax.el.FunctionMapper
*/
public final class DefaultFunctionMapper extends FunctionMapper implements
Externalizable {
private static final long serialVersionUID = 1L;
private Map functions = null;
/*
* (non-Javadoc)
*
* @see javax.el.FunctionMapper#resolveFunction(java.lang.String,
* java.lang.String)
*/
public Method resolveFunction(String prefix, String localName) {
if (this.functions != null) {
Function f = (Function) this.functions
.get(prefix + ":" + localName);
return f.getMethod();
}
return null;
}
public void addFunction(String prefix, String localName, Method m) {
if (this.functions == null) {
this.functions = new HashMap();
}
Function f = new Function(prefix, localName, m);
synchronized (this) {
this.functions.put(prefix + ":" + localName, f);
}
}
/*
* (non-Javadoc)
*
* @see java.io.Externalizable#writeExternal(java.io.ObjectOutput)
*/
public void writeExternal(ObjectOutput out) throws IOException {
out.writeObject(this.functions);
}
/*
* (non-Javadoc)
*
* @see java.io.Externalizable#readExternal(java.io.ObjectInput)
*/
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
this.functions = (Map) in.readObject();
}
public String toString() {
StringBuffer sb = new StringBuffer(128);
sb.append("FunctionMapper[\n");
for (Iterator itr = this.functions.values().iterator();
itr.hasNext();) {
sb.append(itr.next()).append('\n');
}
sb.append(']');
return sb.toString();
}
private static class Function implements Externalizable {
private static final long serialVersionUID = 1L;
protected transient Method m;
protected String owner;
protected String name;
protected String[] types;
protected String prefix;
protected String localName;
/**
*
*/
public Function(String prefix, String localName, Method m) {
if (localName == null) {
throw new NullPointerException("LocalName cannot be null");
}
if (m == null) {
throw new NullPointerException("Method cannot be null");
}
this.prefix = prefix;
this.localName = localName;
this.m = m;
}
public Function() {
// for serialization
}
/*
* (non-Javadoc)
*
* @see java.io.Externalizable#writeExternal(java.io.ObjectOutput)
*/
public void writeExternal(ObjectOutput out) throws IOException {
out.writeUTF((this.prefix != null) ? this.prefix : "");
out.writeUTF(this.localName);
out.writeUTF(this.m.getDeclaringClass().getName());
out.writeUTF(this.m.getName());
out.writeObject(ReflectionUtil.toTypeNameArray(this.m
.getParameterTypes()));
}
/*
* (non-Javadoc)
*
* @see java.io.Externalizable#readExternal(java.io.ObjectInput)
*/
public void readExternal(ObjectInput in) throws IOException,
ClassNotFoundException {
this.prefix = in.readUTF();
if ("".equals(this.prefix)) {
this.prefix = null;
}
this.localName = in.readUTF();
this.owner = in.readUTF();
this.name = in.readUTF();
this.types = (String[]) in.readObject();
}
public Method getMethod() {
if (this.m == null) {
try {
Class t = ReflectionUtil.forName(this.owner);
Class[] p = ReflectionUtil.toTypeArray(this.types);
this.m = t.getMethod(this.name, p);
} catch (Exception e) {
e.printStackTrace();
}
}
return this.m;
}
public boolean matches(String prefix, String localName) {
if (this.prefix != null) {
if (prefix == null) {
return false;
}
if (!this.prefix.equals(prefix)) {
return false;
}
}
return this.localName.equals(localName);
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#equals(java.lang.Object)
*/
public boolean equals(Object obj) {
if (obj instanceof Function) {
return this.hashCode() == obj.hashCode();
}
return false;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#hashCode()
*/
public int hashCode() {
return (this.prefix + this.localName).hashCode();
}
public String toString() {
StringBuffer sb = new StringBuffer(32);
sb.append("Function[");
if (this.prefix != null) {
sb.append(this.prefix).append(':');
}
sb.append(this.name).append("] ");
sb.append(this.m);
return sb.toString();
}
}
}
