Quelle JspValueExpression.java Sprache: JAVA

/*
* 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.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;

import jakarta.el.ELContext;
import jakarta.el.ELException;
import jakarta.el.PropertyNotFoundException;
import jakarta.el.PropertyNotWritableException;
import jakarta.el.ValueExpression;

/**
* Wrapper for providing context to ValueExpressions
*
* @author Jacob Hookom
*/
public final class JspValueExpression extends ValueExpression implements
        Externalizable {

    private ValueExpression target;

    private String mark;

    public JspValueExpression() {
        super();
    }

    public JspValueExpression(String mark, ValueExpression target) {
        this.target = target;
        this.mark = mark;
    }

    @Override
    public Class<?> getExpectedType() {
        return this.target.getExpectedType();
    }

    @Override
    public Class<?> getType(ELContext context) throws NullPointerException,
            PropertyNotFoundException, ELException {
        context.notifyBeforeEvaluation(getExpressionString());
        try {
            Class<?> result = this.target.getType(context);
            context.notifyAfterEvaluation(getExpressionString());
            return result;
        } catch (PropertyNotFoundException e) {
            if (e instanceof JspPropertyNotFoundException) {
                throw e;
            }
            throw new JspPropertyNotFoundException(this.mark, e);
        } catch (ELException e) {
            if (e instanceof JspELException) {
                throw e;
            }
            throw new JspELException(this.mark, e);
        }
    }

    @Override
    public boolean isReadOnly(ELContext context) throws NullPointerException,
            PropertyNotFoundException, ELException {
        context.notifyBeforeEvaluation(getExpressionString());
        try {
            boolean result = this.target.isReadOnly(context);
            context.notifyAfterEvaluation(getExpressionString());
            return result;
        } catch (PropertyNotFoundException e) {
            if (e instanceof JspPropertyNotFoundException) {
                throw e;
            }
            throw new JspPropertyNotFoundException(this.mark, e);
        } catch (ELException e) {
            if (e instanceof JspELException) {
                throw e;
            }
            throw new JspELException(this.mark, e);
        }
    }

    @Override
    public void setValue(ELContext context, Object value)
            throws NullPointerException, PropertyNotFoundException,
            PropertyNotWritableException, ELException {
        context.notifyBeforeEvaluation(getExpressionString());
        try {
            this.target.setValue(context, value);
            context.notifyAfterEvaluation(getExpressionString());
        } catch (PropertyNotWritableException e) {
            if (e instanceof JspPropertyNotWritableException) {
                throw e;
            }
            throw new JspPropertyNotWritableException(this.mark, e);
        } catch (PropertyNotFoundException e) {
            if (e instanceof JspPropertyNotFoundException) {
                throw e;
            }
            throw new JspPropertyNotFoundException(this.mark, e);
        } catch (ELException e) {
            if (e instanceof JspELException) {
                throw e;
            }
            throw new JspELException(this.mark, e);
        }
    }

    @Override
    public <T> T getValue(ELContext context) throws NullPointerException,
            PropertyNotFoundException, ELException {
        context.notifyBeforeEvaluation(getExpressionString());
        try {
            T result = this.target.getValue(context);
            context.notifyAfterEvaluation(getExpressionString());
            return result;
        } catch (PropertyNotFoundException e) {
            if (e instanceof JspPropertyNotFoundException) {
                throw e;
            }
            throw new JspPropertyNotFoundException(this.mark, e);
        } catch (ELException e) {
            if (e instanceof JspELException) {
                throw e;
            }
            throw new JspELException(this.mark, e);
        }
    }

    @Override
    public boolean equals(Object obj) {
        return this.target.equals(obj);
    }

    @Override
    public int hashCode() {
        return this.target.hashCode();
    }

    @Override
    public String getExpressionString() {
        return this.target.getExpressionString();
    }

    @Override
    public boolean isLiteralText() {
        return this.target.isLiteralText();
    }

    @Override
    public void writeExternal(ObjectOutput out) throws IOException {
        out.writeUTF(this.mark);
        out.writeObject(this.target);
    }

    @Override
    public void readExternal(ObjectInput in) throws IOException,
            ClassNotFoundException {
        this.mark = in.readUTF();
        this.target = (ValueExpression) in.readObject();
    }
}

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