org.apache.wicket.validation.CompoundValidator.java Source code

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Here is the source code for org.apache.wicket.validation.CompoundValidator.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.wicket.validation;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.event.IEvent;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.util.lang.Args;

/**
 * A compound {@link IValidator}. Once an error is reported against the {@link IValidatable} being
 * checked, the rest of the validator chain is ignored.
 * 
 * @author Igor Vaynberg (ivaynberg)
 * @param <T>
 *            type of validatable
 * @since 1.2.6
 */
public class CompoundValidator<T> extends Behavior implements IValidator<T> {
    private static final long serialVersionUID = 1L;

    private final List<IValidator<T>> validators = new ArrayList<IValidator<T>>(2);

    /**
     * Constructor.
     */
    public CompoundValidator() {
    }

    /**
     * Adds an <code>IValidator</code> to the chain of validators.
     * 
     * @param validator
     *            an <code>IValidator</code> to be added
     * @return this <code>ValidationError</code> for chaining purposes
     */
    public final CompoundValidator<T> add(IValidator<T> validator) {
        Args.notNull(validator, "validator");

        validators.add(validator);
        return this;
    }

    /**
     * @see IValidator#validate(IValidatable)
     */
    @Override
    public final void validate(IValidatable<T> validatable) {
        Iterator<IValidator<T>> it = validators.iterator();
        while (it.hasNext() && validatable.isValid()) {
            it.next().validate(validatable);
        }
    }

    /**
     * Gets an unmodifiable list of the registered validators.
     * 
     * @return unmodifiable list of delegate {@link IValidator}s inside this one
     */
    public final List<IValidator<T>> getValidators() {
        return Collections.unmodifiableList(validators);
    }

    @Override
    public void beforeRender(Component component) {
        for (IValidator<T> validator : validators) {
            if (validator instanceof Behavior) {
                ((Behavior) validator).beforeRender(component);
            }
        }
    }

    @Override
    public void afterRender(Component component) {
        for (IValidator<T> validator : validators) {
            if (validator instanceof Behavior) {
                ((Behavior) validator).afterRender(component);
            }
        }
    }

    @Override
    public void bind(Component component) {
        for (IValidator<T> validator : validators) {
            if (validator instanceof Behavior) {
                ((Behavior) validator).bind(component);
            }
        }
    }

    @Override
    public void unbind(Component component) {
        for (IValidator<T> validator : validators) {
            if (validator instanceof Behavior) {
                ((Behavior) validator).unbind(component);
            }
        }
    }

    @Override
    public void detach(Component component) {
        for (IValidator<T> validator : validators) {
            if (validator instanceof Behavior) {
                ((Behavior) validator).detach(component);
            }
        }
    }

    @Override
    public void onException(Component component, RuntimeException exception) {
        for (IValidator<T> validator : validators) {
            if (validator instanceof Behavior) {
                ((Behavior) validator).onException(component, exception);
            }
        }
    }

    public boolean getStatelessHint(Component component) {
        for (IValidator<T> validator : validators) {
            if (validator instanceof Behavior && ((Behavior) validator).getStatelessHint(component) == false) {
                return false;
            }
        }
        return super.getStatelessHint(component);
    }

    @Override
    public void onComponentTag(Component component, ComponentTag tag) {
        for (IValidator<T> validator : validators) {
            if (validator instanceof Behavior) {
                ((Behavior) validator).onComponentTag(component, tag);
            }
        }
    }

    @Override
    public void renderHead(Component component, IHeaderResponse response) {
        for (IValidator<T> validator : validators) {
            if (validator instanceof Behavior) {
                ((Behavior) validator).renderHead(component, response);
            }
        }
    }

    @Override
    public void onConfigure(Component component) {
        for (IValidator<T> validator : validators) {
            if (validator instanceof Behavior) {
                ((Behavior) validator).onConfigure(component);
            }
        }
    }

    @Override
    public void onEvent(Component component, IEvent<?> event) {
        for (IValidator<T> validator : validators) {
            if (validator instanceof Behavior) {
                ((Behavior) validator).onEvent(component, event);
            }
        }
    }

    @Override
    public void onRemove(Component component) {
        for (IValidator<T> validator : validators) {
            if (validator instanceof Behavior) {
                ((Behavior) validator).onRemove(component);
            }
        }
    }
}