NullMemory.java

package php.runtime.memory;

import php.runtime.Memory;
import php.runtime.env.Environment;
import php.runtime.lang.StdClass;

public class NullMemory extends FalseMemory {

    public final static NullMemory INSTANCE = new NullMemory();

    protected NullMemory() {
        super(Type.NULL);
    }

    @Override
    public boolean equals(Object o) {
        return this == o || !(o == null || getClass() != o.getClass());
    }

    @Override
    public boolean identical(Memory memory) {
        return memory.getRealType() == Type.NULL;
    }

    @Override
    public boolean identical(boolean value) {
        return false;
    }

    @Override
    public Memory inc() {
        return CONST_INT_1;
    }

    @Override
    public Memory dec() {
        return CONST_INT_M1;
    }

    @Override
    public Memory toArray() {
        return new ArrayMemory().toConstant();
    }

    @Override
    public Memory toObject(Environment env) {
        return new ObjectMemory(new StdClass(env));
    }
}